AT Commands for SmartSCM,
SmartACF, and SmartACFL
Modems
Reference Manual
Conexant Proprietary Information
Doc. No. 100722A
November 2, 2000
Command Reference Manual
Revision Date Comments
A 11/2/2000 Initial release.
© 2000,
All Rights Reserved.
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Contents
1. INTRODUCTION ............................................................................................................................................................... 1-1
1.1 OVERVIEW ............................................................................................................................................................ 1-1
1.1.1 Command Syntax....................................................................................................................................... 1-1
1.1.2 Command Descriptions.............................................................................................................................. 1-1
1.1.3 Call Progress and Blacklisting Parameters ................................................................................................ 1-1
1.1.4 ConfigurACE II for Windows Utility Program.............................................................................................. 1-2
1.2 REFERENCE DOCUMENTATION......................................................................................................................... 1-2
2. SYNTAX AND PROCEDURES ......................................................................................................................................... 2-1
2.1 Alphabet ................................................................................................................................................................. 2-1
2.2 DTE Commands Lines ........................................................................................................................................... 2-1
2.2.1 Command Line General Format................................................................................................................. 2-1
2.2.2 Command Line Editing............................................................................................................................... 2-1
2.2.3 Command Line Echo.................................................................................................................................. 2-1
2.2.4 Repeating a Command Line ...................................................................................................................... 2-2
2.2.5 Types of DTE Commands .......................................................................................................................... 2-2
2.3 Basic Syntax Commands ....................................................................................................................................... 2-2
2.3.1 Basic Syntax Command Format................................................................................................................. 2-2
2.3.2 S-Parameters ............................................................................................................................................. 2-2
2.4 Extended Syntax Commands................................................................................................................................. 2-3
2.4.1 Command Naming Rules ........................................................................................................................... 2-3
2.4.2 Values ........................................................................................................................................................ 2-3
2.4.2.1 Numeric Constants .................................................................................................................... 2-3
2.4.2.2 String Constants ........................................................................................................................ 2-3
2.4.2.3 Compound Values ..................................................................................................................... 2-4
2.4.3 Action Commands...................................................................................................................................... 2-4
2.4.3.1 Action Execution Command Syntax........................................................................................... 2-4
2.4.3.2 Action Test Command Syntax.................................................................................................... 2-4
2.4.4 Parameter Commands ............................................................................................................................... 2-4
2.4.4.1 Parameter Types........................................................................................................................ 2-4
2.4.4.2 Parameter Set Command Syntax .............................................................................................. 2-5
2.4.4.3 Parameter Read Command Syntax ........................................................................................... 2-5
2.4.4.4 Parameter Test Command Syntax............................................................................................. 2-5
2.4.5 Additional Syntax Rules ............................................................................................................................. 2-5
2.4.5.1 Concatenating Commands after Extended Syntax Commands................................................. 2-5
2.4.5.2 Concatenating Commands after Basic Format Commands....................................................... 2-5
2.5 Issuing Commands................................................................................................................................................. 2-6
2.6 Executing Commands ............................................................................................................................................ 2-6
2.6.1 Aborting Commands .................................................................................................................................. 2-6
2.6.2 Handling of Invalid Numbers and S-Parameter Values.............................................................................. 2-6
2.7 Modem Responses................................................................................................................................................. 2-6
2.7.1 Responses ................................................................................................................................................. 2-7
2.7.2 Extended Syntax Result Codes.................................................................................................................. 2-7
2.7.3 +<name>: <compound_value>Information Text Formats for Test Commands.......................................... 2-8
2.7.3.1 Range of Values ........................................................................................................................ 2-8
2.7.3.2 Compound Range of Values...................................................................................................... 2-8
3. DATA COMMAND SET..................................................................................................................................................... 3-1
3.1 COMMAND GUIDELINES...................................................................................................................................... 3-1
3.1.1 Escape Code Sequence ............................................................................................................................ 3-1
3.2 DATA COMMANDS................................................................................................................................................ 3-1
3.2.1 Generic Modem Control ............................................................................................................................. 3-1
3.2.1.1 Z - Soft Reset and Restore Profile ............................................................................................. 3-1
3.2.1.2 +FCLASS - Select Active Service Class ....................................................................................3-2
3.2.1.3 +VCID - Caller ID (CID).............................................................................................................. 3-2
3.2.1.4 +VRID - Report Retrieved Caller ID (CID).................................................................................. 3-3
3.2.1.5 \N - Operating Mode................................................................................................................... 3-3
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3.2.1.6 -SMS= - Select Mode................................................................................................................. 3-4
3.2.1.7 I - Identification........................................................................................................................... 3-5
3.2.1.8 +GMI - Request Manufacturer Identification .............................................................................. 3-5
3.2.1.9 +GMI9 - Request Conexant Identification ..................................................................................3-6
3.2.1.10 +GMM - Request Model Identification........................................................................................ 3-6
3.2.1.11 +GMR - Request Revision Identification .................................................................................... 3-6
3.2.1.12 +GCAP - Request Complete Capabilities List............................................................................ 3-7
3.2.1.13 +GCI - Country of Installation..................................................................................................... 3-8
3.2.1.14 &F - Restore Factory Configuration (Profile).............................................................................. 3-9
3.2.1.15 &T - Local Analog Loopback Test.............................................................................................. 3-9
3.2.1.16 &Y - Designate a Default Reset Profile...................................................................................... 3-9
3.2.1.17 &W - Store Current Configuration ............................................................................................ 3-10
3.2.1.18 &Zn=x - Store Telephone Number ........................................................................................... 3-10
3.2.1.19 %7 - Plug and Play Serial Number........................................................................................... 3-10
3.2.1.20 %8 - Plug and Play Vendor ID and Product Number ............................................................... 3-11
3.2.1.21 **- Load Flash Memory ............................................................................................................ 3-11
3.2.2 DTE-Modem Interface commands ........................................................................................................... 3-12
3.2.2.1 E - Command Echo.................................................................................................................. 3-12
3.2.2.2 Q - Quiet Results Codes Control.............................................................................................. 3-13
3.2.2.3 V - Result Code Form .............................................................................................................. 3-13
3.2.2.4 W - Connect Message Control................................................................................................. 3-13
3.2.2.5 X - Extended Result Codes...................................................................................................... 3-14
3.2.2.6 &C - RLSD (DCD) Option......................................................................................................... 3-18
3.2.2.7 &D - DTR Option ...................................................................................................................... 3-18
3.2.2.8 &K - Flow Control..................................................................................................................... 3-19
3.2.2.9 &M - Asynchronous/Synchronous Mode Selection.................................................................. 3-19
3.2.2.10 &Q - Sync/Async Mode............................................................................................................ 3-20
3.2.2.11 &R - RTS/CTS Option .............................................................................................................. 3-20
3.2.2.12 &S - DSR Override................................................................................................................... 3-21
3.2.2.13 &X - Select Synchronous Clock Source................................................................................... 3-21
3.2.2.14 +IPR - Fixed DTE Rate ............................................................................................................ 3-22
3.2.2.15 +IFC - DTE-Modem Local Flow Control................................................................................... 3-23
3.2.2.16 +ILRR - DTE-Modem Local Rate Reporting............................................................................. 3-23
3.2.3 Call Control .............................................................................................................................................. 3-24
3.2.3.1 D - Dial ..................................................................................................................................... 3-24
3.2.3.2 T - Set Tone Dial Default.......................................................................................................... 3-26
3.2.3.3 P - Set Pulse Dial Default......................................................................................................... 3-26
3.2.3.4 A - Answer................................................................................................................................ 3-26
3.2.3.5 H - Disconnect (Hang-Up)........................................................................................................ 3-26
3.2.3.6 O - Return to On-Line Data Mode ............................................................................................ 3-27
3.2.3.7 L - Speaker Volume ................................................................................................................. 3-27
3.2.3.8 M - Speaker Control................................................................................................................. 3-28
3.2.3.9 &G - Select Guard Tone........................................................................................................... 3-28
3.2.3.10 &P - Select Pulse Dial Make/Break Ratio ................................................................................ 3-29
3.2.3.11 &V - Display Current Configuration and Stored Profiles .......................................................... 3-29
3.2.3.12 &V1 - Display Last Connection Statistics................................................................................. 3-30
3.2.3.13 \V - Single Line Connect Message Enable............................................................................... 3-31
3.2.3.14 %L - Report Line Signal Level.................................................................................................. 3-31
3.2.3.15 %Q - Report Line Signal Quality .............................................................................................. 3-32
3.2.3.16 *B - Display Blacklisted Numbers............................................................................................. 3-32
3.2.3.17 *D - Display Delayed Numbers ................................................................................................ 3-32
3.2.3.18 –PPD= - Extension Pickup Notification through 16550 UART ................................................. 3-33
3.2.3.19 –STE= - Set Telephony Extension........................................................................................... 3-33
3.2.4 Modulation Control Commands................................................................................................................ 3-37
3.2.4.1 +MS - Modulation Selection ..................................................................................................... 3-37
3.2.4.2 +MR - Modulation Reporting Control........................................................................................ 3-38
3.2.4.3 %E - Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward............ 3-39
3.2.4.4 %U - Select µ-Law or A-Law Codec Type................................................................................ 3-40
3.2.4.5 B - CCITT or Bell...................................................................................................................... 3-40
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3.2.5 Error Control Commands ......................................................................................................................... 3-41
3.2.5.1 +ES - Error Control and Synchronous Mode Selection............................................................ 3-41
3.2.5.2 +EB - Break Handling in Error Control Operation .................................................................... 3-42
3.2.5.3 +ESR - Selective Repeat ......................................................................................................... 3-43
3.2.5.4 +EFCS - 32-bit Frame Check Sequence ................................................................................. 3-43
3.2.5.5 +ER - Error Control Reporting.................................................................................................. 3-44
3.2.5.6 +ETBM - Call Termination Buffer Management ....................................................................... 3-45
3.2.5.7 \B - Transmit Break to Remote................................................................................................. 3-45
3.2.5.8 \K - Break Control..................................................................................................................... 3-46
3.2.5.9 -K - MNP Extended Services.................................................................................................... 3-47
3.2.6 Data Compression Commands ................................................................................................................ 3-47
3.2.6.1 +DS - Data Compression ......................................................................................................... 3-47
3.2.6.2 +DR - Data Compression Reporting ........................................................................................ 3-48
3.2.6.3 %C - Enable/Disable Data Compression ................................................................................. 3-49
3.2.7 V.8/V.8bis Commands ............................................................................................................................. 3-50
3.2.7.1 +A8E - V.8 and V.8bis Operation Controls .............................................................................. 3-50
3.2.7.2 +A8I: - CI Signal Indication ...................................................................................................... 3-51
3.2.8 Synchronous Access Mode Commands .................................................................................................. 3-51
3.2.8.1 +ESA - Configure Synchronous Access Submode .................................................................. 3-52
3.2.8.2 +H - Enable/Disable RPI and Host DSVD................................................................................ 3-53
3.2.8.3 +ITF - Transmit Flow Control Thresholds................................................................................. 3-54
3.2.9 Diagnostic Commands ............................................................................................................................. 3-55
3.2.9.1 #UD – Last Call Status Report................................................................................................. 3-55
3.2.10 Compatibility Commands ......................................................................................................................... 3-62
3.2.10.1 &L - Leased Line Operation ..................................................................................................... 3-62
3.2.10.2 )M - Enable Cellular Power Level Adjustment.......................................................................... 3-62
3.2.10.3 @M - Initial Cellular Power Level Setting................................................................................. 3-62
3.2.10.4 :E - Compromise Equalizer Enable Command ........................................................................ 3-63
3.2.11 FastConnect Commands ......................................................................................................................... 3-63
3.2.11.1 $F – FastConnect Control........................................................................................................ 3-63
3.3 S-PARAMETERS ................................................................................................................................................. 3-64
3.3.1.1 S - Read/Write S-Parameter .................................................................................................... 3-64
3.3.2 FACTORY DEFAULTS............................................................................................................................. 3-64
3.3.3 S-PARAMETER DEFINITIONS................................................................................................................ 3-66
3.3.3.1 S0 - Number of Rings to Auto-Answer ..................................................................................... 3-66
3.3.3.2 S1 - Ring Counter .................................................................................................................... 3-66
3.3.3.3 S2 - Escape Character............................................................................................................. 3-66
3.3.3.4 S3 - Carriage Return Character ............................................................................................... 3-66
3.3.3.5 S4 - Line Feed Character......................................................................................................... 3-66
3.3.3.6 S5 - Backspace Character ....................................................................................................... 3-66
3.3.3.7 S6 - Wait Time before Blind Dialing or for Dial Tone ............................................................... 3-67
3.3.3.8 S7 - Wait Time for Carrier, Silence, or Dial Tone..................................................................... 3-67
3.3.3.9 S8 - Pause Time For Dial Delay............................................................................................... 3-67
3.3.3.10 S9 - Carrier Detect Response Time......................................................................................... 3-67
3.3.3.11 S10 - Lost Carrier To Hang Up Delay ...................................................................................... 3-67
3.3.3.12 S11 - DTMF Tone Duration...................................................................................................... 3-68
3.3.3.13 S12 - Escape Prompt Delay (EPD) .......................................................................................... 3-68
3.3.3.14 S14 - General Bit Mapped Options Status............................................................................... 3-68
3.3.3.15 S16 - Test Mode Bit Mapped Options Status........................................................................... 3-69
3.3.3.16 S19 - Reserved ........................................................................................................................ 3-69
3.3.3.17 S20 - Reserved ........................................................................................................................ 3-69
3.3.3.18 S21 - V.24/General Bit Mapped Options Status....................................................................... 3-69
3.3.3.19 S22 - Speaker/Results Bit Mapped Options Status ................................................................. 3-70
3.3.3.20 S23 - General Bit Mapped Options Status............................................................................... 3-70
3.3.3.21 S24 - Sleep Inactivity Timer ..................................................................................................... 3-70
3.3.3.22 S25 - Delay To DTR Off ........................................................................................................... 3-70
3.3.3.23 S26 - RTS to CTS Delay .......................................................................................................... 3-71
3.3.3.24 S27 - Bit Mapped Options Status............................................................................................. 3-71
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3.3.3.25 S28 - Bit Mapped Options Status............................................................................................. 3-71
3.3.3.26 S29 - Flash Dial Modifier Time................................................................................................. 3-72
3.3.3.27 S30 - Disconnect Inactivity Timer............................................................................................. 3-72
3.3.3.28 S31 - Bit Mapped Options Status............................................................................................. 3-72
3.3.3.29 S36 - LAPM Failure Control ..................................................................................................... 3-72
3.3.3.30 S38 - Delay Before Forced Hang Up .......................................................................................3-73
3.3.3.31 S39 - Flow Control Bit Mapped Options Status........................................................................ 3-73
3.3.3.32 S40 - General Bit Mapped Options Status............................................................................... 3-73
3.3.3.33 S41 - General Bit Mapped Options Status............................................................................... 3-74
3.3.3.34 S46 - Data Compression Control ............................................................................................. 3-74
3.3.3.35 S48 - V.42 Negotiation Control ................................................................................................ 3-74
3.3.3.36 S86 - Call Failure Reason Code .............................................................................................. 3-75
3.3.3.37 S91 - PSTN Transmit Attenuation Level .................................................................................. 3-76
3.3.3.38 S92 - Fax Transmit Attenuation Level...................................................................................... 3-76
3.3.3.39 S95 - Extended Result Codes Control .....................................................................................3-76
3.3.3.40 S210 – V.34 Symbol Rates...................................................................................................... 3-77
3.4 CELLULAR COMMANDS..................................................................................................................................... 3-78
3.4.1 Cellular Phone Drivers ............................................................................................................................. 3-78
3.4.2 Cellular Commands.................................................................................................................................. 3-78
3.4.2.1 ^C2 - Download Cellular Phone Driver.....................................................................................3-78
3.4.2.2 ^I - Identify Cellular Phone Driver............................................................................................. 3-78
3.4.2.3 ^T6 - Indicate Status of Cellular Phone.................................................................................... 3-79
3.4.3 Operation ................................................................................................................................................. 3-79
3.4.3.1 Modem Configuration............................................................................................................... 3-79
3.4.3.2 Fax Configuration..................................................................................................................... 3-80
3.4.3.3 Cellular Phone Configuration ................................................................................................... 3-80
3.5 RESULT CODES.................................................................................................................................................. 3-82
4. FAX CLASS 1 AND FAX CLASS 1.0 COMMANDS......................................................................................................... 4-1
4.1 FAX I/O PROCESSING.......................................................................................................................................... 4-1
4.1.1 DTE-to-Modem Transmit Data Stream....................................................................................................... 4-1
4.1.2 Modem-to-DTE Receive Data Stream........................................................................................................ 4-1
4.1.3 Fax Mode Selection.................................................................................................................................... 4-1
4.1.4 Fax Origination........................................................................................................................................... 4-2
4.1.5 Fax Answering............................................................................................................................................ 4-2
4.1.6 Fax Control Transmission .......................................................................................................................... 4-2
4.1.7 Fax Control Reception................................................................................................................................ 4-2
4.1.8 Fax Data Transmission .............................................................................................................................. 4-3
4.1.9 Fax Data Reception.................................................................................................................................... 4-3
4.2 COMMANDS AND PARAMETERS ........................................................................................................................ 4-4
4.2.1 Mode Entry Commands.............................................................................................................................. 4-4
4.2.1.1 +FCLASS=1 - Select Facsimile Class 1 Mode........................................................................... 4-4
4.2.1.2 +FCLASS=1.0 - Select Facsimile Class 1.0 Mode..................................................................... 4-4
4.2.2 Mode Commands ....................................................................................................................................... 4-4
4.2.2.1 +FAA - Auto Answer Enable ...................................................................................................... 4-4
4.2.2.2 +FAE - Auto Answer Enable ...................................................................................................... 4-4
4.2.2.3 +FTS - Transmit Silence ............................................................................................................ 4-5
4.2.2.4 +FRS - Receive Silence............................................................................................................. 4-5
4.2.2.5 +FTM - Transmit Facsimile ........................................................................................................ 4-6
4.2.2.6 +FRM - Receive Facsimile......................................................................................................... 4-7
4.2.2.7 +FTH - Transmit Data with HDLC Framing................................................................................ 4-8
4.2.2.8 +FRH - Receive Data with HDLC Framing................................................................................. 4-9
4.2.3 Service Class 1 Parameters..................................................................................................................... 4-10
4.2.3.1 +FAR - Adaptive Reception Control......................................................................................... 4-10
4.2.3.2 +FCL - Carrier Loss Timeout ................................................................................................... 4-10
4.2.3.3 +FDD - Double Escape Character Replacement ..................................................................... 4-10
4.2.3.4 +FIT - DTE Inactivity Timeout .................................................................................................. 4-12
4.2.3.5 +FPR - Fixed DTE Rate ........................................................................................................... 4-13
4.2.3.6 +FMI? - Request Manufacturer Identification........................................................................... 4-13
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4.2.3.7 +FMM? - Request Model Identification .................................................................................... 4-13
4.2.3.8 +FMR? - Request Revision Identification................................................................................. 4-14
4.2.3.9 +FLO - Flow Control................................................................................................................. 4-14
4.3 EXAMPLES .......................................................................................................................................................... 4-14
5. FAX CLASS 2 COMMANDS............................................................................................................................................. 5-1
5.1 COMMAND SYNTAX AND GUIDELINES............................................................................................................... 5-1
5.1.1 Mode Entry Commands.............................................................................................................................. 5-1
5.1.1.1 +FCLASS=2 - Select Facsimile Class 2 Mode........................................................................... 5-1
5.1.2 DTE Commands......................................................................................................................................... 5-1
5.1.2.1 DTE Command Lines................................................................................................................. 5-1
5.1.2.2 Facsimile Command Syntax ...................................................................................................... 5-1
5.1.3 Serial Port Speed and Flow Control ........................................................................................................... 5-3
5.1.3.1 Data Stream Termination........................................................................................................... 5-3
5.1.3.2 DTE to DCE Streams ................................................................................................................. 5-3
5.1.3.3 DCE to DTE Streams ................................................................................................................. 5-3
5.1.4 Auto Answer ............................................................................................................................................... 5-3
5.1.5 Identification of T.30 Options ..................................................................................................................... 5-4
5.1.6 Session Status Reporting........................................................................................................................... 5-4
5.1.7 Procedure Interrupt Negotiation ................................................................................................................. 5-4
5.2 SERVICE CLASS 2 IDENTIFICATION AND SELECTION..................................................................................... 5-4
5.2.1 +FMFR? - Request Manufacturer Identification ......................................................................................... 5-4
5.2.2 +FMDL? - Identify Product Model............................................................................................................... 5-4
5.2.3 +FREV? - Identify Product Revision........................................................................................................... 5-4
5.3 SERVICE CLASS 2 ACTION COMMANDS............................................................................................................ 5-4
5.3.1 ATD - Originate a Call ................................................................................................................................ 5-5
5.3.2 ATA - Answer a Call ................................................................................................................................... 5-5
5.3.2.1 Manual Call Answer ................................................................................................................... 5-5
5.3.2.2 Automatic Answer ...................................................................................................................... 5-5
5.3.2.3 Connection as a Data Modem.................................................................................................... 5-5
5.3.3 +FDT - Data Transmission ......................................................................................................................... 5-6
5.3.3.2 Initiate Page Transmission......................................................................................................... 5-6
5.3.3.3 Continue a Page ........................................................................................................................ 5-6
5.3.3.4 Phase C Data Framing............................................................................................................... 5-6
5.3.3.5 Phase C Data Format ................................................................................................................ 5-6
5.3.3.6 <CAN> - Escape from Transmission.......................................................................................... 5-6
5.3.4 +FET - Transmit Page Punctuation............................................................................................................ 5-8
5.3.4.1 End a Page ................................................................................................................................ 5-8
5.3.5 +FDR - Begin or Continue Phase C Receive Data..................................................................................... 5-9
5.3.5.1 Initiate Document Reception...................................................................................................... 5-9
5.3.5.2 Continue Document Reception ................................................................................................ 5-10
5.3.5.3 Phase C Data Framing............................................................................................................. 5-10
5.3.5.4 Phase C Data Format .............................................................................................................. 5-10
5.3.5.5 <CAN> - Escape from Reception............................................................................................. 5-10
5.3.6 +FK - Session Termination....................................................................................................................... 5-10
5.3.7 +FCIG - Set Polling ID.............................................................................................................................. 5-11
5.3.8 +FLPL - Indicate a Document for Polling ................................................................................................. 5-11
5.3.9 +FSPL - Enable Polling ............................................................................................................................ 5-11
5.4 SERVICE CLASS 2 DCE RESPONSES .............................................................................................................. 5-13
5.4.1 +FCON - Facsimile Connection Response .............................................................................................. 5-13
5.4.2 +FDCS: - Report Current Session Capabilities ........................................................................................ 5-13
5.4.3 +FDIS: - Report Remote Station Capabilities........................................................................................... 5-13
5.4.4 +FCFR - Indicate Confirmation to Receive .............................................................................................. 5-13
5.4.5 +FTSI: - Report the Transmit Station ID................................................................................................... 5-13
5.4.6 +FCSI: - Report the Called Station ID ...................................................................................................... 5-13
5.4.7 +FPTS: - Receive Page Transfer Status.................................................................................................. 5-14
5.4.8 +FET: - Post Page Message Response................................................................................................... 5-14
5.4.9 +FPTS: - Transmit Page Transfer Status................................................................................................. 5-14
5.4.10 +FHNG: - Call Termination with Status .................................................................................................... 5-14
5.4.11 +FCIG: - Report the Polled Station ID...................................................................................................... 5-15
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5.4.12 +FDTC: - Report the Polled Station Capabilities...................................................................................... 5-15
5.4.13 +FPOLL - Indicate Polling Request.......................................................................................................... 5-15
5.5 SERVICE CLASS 2 PARAMETERS..................................................................................................................... 5-16
5.5.1 +FDCC - DCE Capabilities Parameters ................................................................................................... 5-16
5.5.2 +FDIS - Current Sessions Capabilities Parameters ................................................................................. 5-16
5.5.3 +FDCS - Current Session Results Parameters ........................................................................................ 5-17
5.5.4 +FLID= - Local ID String .......................................................................................................................... 5-18
5.5.5 +FCR - Capability to Receive................................................................................................................... 5-18
5.5.6 +FPTS= - Page Transfer Status............................................................................................................... 5-18
5.5.7 +FCQ - Copy Quality Checking................................................................................................................ 5-18
5.5.8 +FPHCTO - DTE Phase C Response Time-out ....................................................................................... 5-18
5.5.9 +FAXERR - T.30 Session Error Report.................................................................................................... 5-19
5.5.10 +FBOR - Data Bit Order ........................................................................................................................... 5-19
5.5.11 +FAA - Answer Parameter ....................................................................................................................... 5-19
5.5.12 +FBUF? - Buffer Size ............................................................................................................................... 5-20
5.6 EXAMPLE SESSIONS ......................................................................................................................................... 5-20
6. VOICE COMMANDS......................................................................................................................................................... 6-1
6.1 Voice Commands Overview ................................................................................................................................... 6-1
6.1.1 <DLE> Shielded Event Codes Sent to the DTE ......................................................................................... 6-2
6.1.2 <DLE> Shielded Codes Sent to the Modem (DCE) ................................................................................... 6-3
6.2 Voice Commands ................................................................................................................................................... 6-4
6.2.1 Configuration Commands .......................................................................................................................... 6-4
6.2.1.1 +FCLASS=8 - Select Voice Mode.............................................................................................. 6-4
6.2.1.2 +VNH - Automatic Hang-up Control........................................................................................... 6-4
6.2.2 Voice Commands....................................................................................................................................... 6-5
6.2.2.1 +VIP - Voice Initialize All Parameters ........................................................................................ 6-5
6.2.2.2 +VRX - Start Modem Receive (Record)..................................................................................... 6-5
6.2.2.3 +VTS - Send Voice Tone(s) ....................................................................................................... 6-6
6.2.2.4 +VTX - Start Modem Transmit (Playback).................................................................................. 6-8
6.2.2.5 +VGR - Voice Gain Receive (Record Gain)............................................................................... 6-8
6.2.2.6 +VGT - Voice Gain Transmit (Playback Volume)....................................................................... 6-8
6.2.2.7 +VIT - Voice Inactivity Timer (DTE/Modem)............................................................................... 6-9
6.2.2.8 +VLS - Analog Source/Destination Selection........................................................................... 6-10
6.2.2.9 +VRA - Ringback Goes Away Timer........................................................................................ 6-13
6.2.2.10 +VRN - Ringback Never Appeared Timer................................................................................ 6-13
6.2.2.11 +VSD - Silence Detection (Quiet and Silence)......................................................................... 6-14
6.2.2.12 +VSM - Compression Method Selection .................................................................................. 6-15
6.2.2.13 +VTD - Beep Tone Duration Timer .......................................................................................... 6-16
6.2.2.14 +VDR - Distinctive Ring ........................................................................................................... 6-17
6.2.2.15 +VDT - Control Tone Cadence Reporting***............................................................................ 6-18
6.2.2.16 +VPR - Select DTE/Modem Interface Rate (Turn Off Autobaud)............................................. 6-19
6.2.3 Speakerphone Commands ...................................................................................................................... 6-20
6.2.3.1 +VSP - Speakerphone ON/OFF...............................................................................................6-20
6.2.3.2 +VDX - Speakerphone Duplex Mode....................................................................................... 6-20
6.2.3.3 +VGM - Microphone Gain ........................................................................................................ 6-21
6.2.3.4 +VGS - Speaker Gain .............................................................................................................. 6-21
7. INDEX ............................................................................................................................................................................. 7-23
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Tables
Table 3-1. Result Codes......................................................................................................................................................... 3-15
Table 3-2. +MS Command Supported Rates ......................................................................................................................... 3-37
Table 3-3. AT#UD Last Call Status Report Format ................................................................................................................ 3-57
Table 3-4. Call Setup Result Codes ....................................................................................................................................... 3-58
Table 3-5. Multimedia Modes ................................................................................................................................................. 3-58
Table 3-6. DTE-DCE modes................................................................................................................................................... 3-58
Table 3-7. V.34 INFO bit report .............................................................................................................................................. 3-58
Table 3-8. gstnModulationSchemeActive from 3.7.2/V.58 ..................................................................................................... 3-59
Table 3-9. errorControl Active from 3.5.2/V.58....................................................................................................................... 3-59
Table 3-10. compressionActive from 3.2.2/V.58..................................................................................................................... 3-59
Table 3-11. callCleared codes from 3.6.4/V.58-1994............................................................................................................. 3-60
Table 3-12. Completed Data Call, with some errors and rate retrain during the call.............................................................. 3-61
Table 3-13. S-Parameter Summary........................................................................................................................................ 3-65
Table 3-14. Remote Modem Configuration and Resulting Transmit Levels ........................................................................... 3-81
Table 3-15. Result Code Definitions....................................................................................................................................... 3-83
Table 4-1. Fax Class 1 and Fax Class 1.0 Commands............................................................................................................ 4-1
Table 4-2. Fax Class 1 and Fax Class 1.0 Modulation Modes and Rates................................................................................ 4-6
Table 4-3. Inactivity Timer Start and Stop Events .................................................................................................................. 4-12
Table 4-4. Fax Class 1 Calling Sequence (Transmitting a Single Page)................................................................................ 4-15
Table 4-5. Fax Class 1 Answering Sequence (Receiving a Single Page).............................................................................. 4-16
Table 5-1. Fax Class 2 Commands.......................................................................................................................................... 5-2
Table 5-2. T.30 Session Subparameter Codes ........................................................................................................................ 5-7
Table 5-3. T.30 Post Page Message Codes............................................................................................................................. 5-8
Table 5-4. T.30 Post Page Response Messages..................................................................................................................... 5-8
Table 5-5. Hang Up Status Codes.......................................................................................................................................... 5-12
Table 5-6. Send Two Pages, 1-D, No Errors.......................................................................................................................... 5-21
Table 5-7. Receive Two Pages, 1-D Data, No Errors............................................................................................................. 5-22
Table 6-1. Voice Commands.................................................................................................................................................... 6-1
Table 6-2. Supported <DLE> Shielded Codes Sent to the DTE............................................................................................... 6-2
Table 6-3. Supported <DLE> Shielded Codes Sent to the Modem (DCE)............................................................................... 6-3
Table 6-4. +VNH Command Behavior...................................................................................................................................... 6-4
Table 6-5. +VLS Command Options....................................................................................................................................... 6-11
Table 6-6. Events Detectable in the Voice Mode per V.253................................................................................................... 6-12
Figures
Figure 5-1. T.30 Session Parameter Relationships................................................................................................................ 5-16
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1. INTRODUCTION
1.1 OVERVIEW
This manual describes the host command and responses for the following Conexant modem families:
SmartSCM™ Modem Device Set
SmartACF™ Modem Device Set
SmartACFL™ Modem Device Set
The commands and responses are implemented in controller firmware for specific modem models. Additional configuration
and implementation information is available in release notes and/or readme files that accompany product firmware release.
The descriptions in this manual apply to all commands and parameters that may be supported by different modem models.
Refer to Modem Firmware Release notes for commands applicable to specific modem models.
1.1.1 Command Syntax
The fundamental DTE interface command syntax is described in Section 2.
1.1.2 Command Descriptions
Commands are grouped into the following categories:
Syntax and procedures Section 2
Data commands Section 3
Fax Class 1 and Fax Class 1.0 commands Section 5
Fax Class 2 commands Section 6
Voice/Audio commands Section 7
1.1.3 Call Progress and Blacklisting Parameters
The SmartACF and SmartACFL modem MCU firmware may be provided either in reconfigurable form or preconfigured form.
Consult the specific firmware release notes for exact configuration information.
Reconfigurable Form.
ConfigurACE II program. The call progress and blacklisting parameters described in the ConfigurACE II User's Manual can be
altered and loaded for a number of countries by this program.
Preconfigured Form.
the use of ConfigurACE II.
The modem MCU firmware can be configured for operation in specific countries by the PC-compatible
Specific MCU firmware configurations may be released that can be directly installed without requiring
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1.1.4 ConfigurACE II for Windows Utility Program
The PC-based ConfigurACE II for Windows utility program allows the OEM to customize SmartACF and SmartACFL modem
firmware to suit specific application and country requirements. ConfigurACE II for Windows allows programming of functions
such as:
Loading of multiple sets of country parameters
•
Loading of NVRAM factory profiles
•
Call progress and blacklisting parameters
•
Entry of S parameter maximum/minimum/default values
•
Limitation of transmit levels
•
Modification of factory default values
•
Customization of the ATI4 response
•
Customization of fax OEM messages
•
Enabling of Telephony Extension features
•
Direct Mode
•
This program modifies the hex object code which can be programmed directly into the system Flash ROM. Lists of the
generated parameters can be displayed or printed.
Conexant-provided country parameter files allow a complete set of country-specific call progress and blacklisting parameters
to be selected.
Refer to the ConfigurACE II for Windows software for a detailed description of capabilities and the operating procedure.
1.2 REFERENCE DOCUMENTATION
Document Title Document No.
SmartSCM Modem, V.90/K56flex/V.34/V.32bis CX88168 Single Chip Modem with CX20463
SmartDAA and Optional CX20437 Voice Codec for Embedded Applications Designer's Guide
SmartACF Modem, V.90/K56flex/V.34/V.32bis Modem Device Set with CX02200 Modem
Controller and DSP, CX20463 SmartDAA and Optional CX20437 Voice Codec Designer's Guide
SmartACFL Modem, V.90/K56flex/V.34/V.32bis Modem Device Set with L2702 Microcontroller,
P9373 Modem Data Pump, CX20463 SmartDAA, and Optional CX20437 Voice Codec for Low
Power Applications Designer's Guide
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100498
100444
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2. SYNTAX AND PROCEDURES
The command and response syntax and procedures generally conform to referenced recommendations and standards. Since
these recommendations and standards describe characteristics universal to a large installed base of modems to a maximum
degree, there may be syntax and procedural differences due to extensions and behavioral differences in implemented
commands, parameters, and responses beyond that described in these recommendations and standards.
The syntax and procedures described in this section are based on V.250 and V.253 with additional information included for
implemented extensions, behavioral differences beyond V.250, and legacy commands.
2.1 Alphabet
The T.50 International Alphabet 5 (IA5) is used in this document. Only the low-order seven bits of each character are
significant to the modem; any eighth or higher-order bit(s), if present, are ignored for the purpose of identifying commands
and parameters. Lower-case characters are considered identical to their upper-case equivalents when received by the
modem from the DTE. Result codes from the modem are in upper case.
2.2 DTE Commands Lines
Words enclosed in <angle brackets> are references to syntactical elements. The brackets are not used when the words
appear in a command line, the brackets are not used. Words enclosed in [square brackets] represent optional items which
may be omitted from the command line at the specified point. The square brackets are not used when the words appear in
the command line. Other characters that appear in syntax descriptions must as included as shown.
Any modem responses are mentioned in terms of their alphabetic format; the actual response issued will depend on the
setting of parameters that affect response formats, e.g., Q and V commands (see 2.7).
2.2.1 Command Line General Format
A command line is made up of three elements: the prefix, the body, and the termination character.
The command line prefix consists of the characters "AT" or "at" or, to repeat the execution of the previous command line, the
characters "A/" or "a/".
The body is made up of individual commands described in this document. Space characters (IA5 2/0) are ignored and may be
used freely for formatting purposes, unless they are embedded in numeric or string constants. The termination character may
not appear in the body. The modem can accept at least 50 characters in the body.
The termination character may be selected by a user option (parameter S3), the default being CR.
2.2.2 Command Line Editing
The character defined by parameter S5 (default, BS) is interpreted as a request from the DTE to the modem to delete the
previous character. Any control characters (IA5 0/0 through 1/15, inclusive) that remain in the command line after receipt of
the termination character are ignored by the modem.
The modem checks characters from the DTE first to see if they match the termination character (S3), then the editing
character (S5), before checking for other characters. This ensures that these characters will be properly recognized even if
they are set to values that the modem uses for other purposes. If S3 and S5 are set to the same value, a matching character
will be treated as matching S3 (S3 is checked before S5).
2.2.3 Command Line Echo
The modem may echo characters received from the DTE during command state and online command state back to the DTE,
depending on the setting of the E command. If enabled, characters received from the DTE are echoed in the same format as
received. Invalid characters in the command line or incomplete or improperly-formed command line prefixes may not be
echoed.
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2.2.4 Repeating a Command Line
If the prefix "A/" or "a/" is received, the modem immediately executes once again the body of the preceding command line. No
editing is possible, and no termination character is necessary. A command line may be repeated multiple times in this
manner. Responses to the repeated command line are issued using format of the original command line. If "A/" is received
before any command line has been executed, the preceding command line is assumed to have been empty (that results in an
OK result code).
2.2.5 Types of DTE Commands
There are two types of commands: action commands and parameter commands. Commands of either type may be included
in command lines, in any order.
Action commands may be "executed" (to invoke a particular function of the equipment, which generally involves more than
the simple storage of a value for later use), or "tested" (to determine whether or not the equipment implements the action
command, and, if subparameters are associated with the action, the ranges of subparameter values that are supported).
Parameters may be "set" (to store a value or values for later use), "read" (to determine the current value or values stored), or
"tested" (to determine whether or not the equipment implements the parameter, and the ranges of values supported).
2.3 Basic Syntax Commands
2.3.1 Basic Syntax Command Format
The format of Basic Syntax commands, except for the D and S commands, is as follows:
<command>[<number>]
where <command> is either a single character, or the "&" character followed by a single character per V.250. In addition,
<command> can be the "%" character followed by a single character, the "*" character followed by a single character, or the
"^" character followed by a single character.
<number> may be a string of one or more characters from "0" through "9" representing a decimal integer value. Commands
that expect a <number> are noted in the description of the command. If a command expects <number> and it is missing
(<command> is immediately followed in the command line by another <command> or the termination character), the value "0"
is assumed. If a command does not expect a <number> and a number is present, an ERROR is generated. All leading "0"s in
<number> are ignored by the modem.
Additional commands may follow a command (and associated parameter, if any) on the same command line without any
character required for separation. The actions of some commands cause the remainder of the command line to be ignored
(e.g., A).
See the D command for details on the format of the information that follows it.
2.3.2 S-Parameters
Commands that begin with the letter "S" are known as "S-parameters". The number following the "S" indicates the "parameter
number" being referenced. If the number is not recognized as a valid parameter number, an ERROR result code is issued.
Immediately following this number, either a "?" or "=" character must appear. "?" is used to read the current value of the
indicated S-parameter; "=" is used to set the S-parameter to a new value.
S<parameter_number>?
S<parameter_number>=[<value>]
If the "=" is used, the new value to be stored in the S-parameter is specified in decimal following the "=". If no value is given
(i.e., the end of the command line occurs or the next command follows immediately), the S-parameter specified may be set to
0, or an ERROR result code issued and the stored value left unchanged. The ranges of acceptable values are given in the
description of each S-parameter.
If the "?" is used, the modem transmits a single line of information text to the DTE. The text portion of this information text
consists of exactly three characters, giving the value of the S-parameter in decimal, with leading zeroes included.
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2.4 Extended Syntax Commands
2.4.1 Command Naming Rules
Both actions and parameters have names, which are used in the related commands. Names always begin with the character
"+". Following the "+", from one to 16 additional characters appear in the command name. These characters will be selected
from the following set:
A through Z (IA5 4/1 through 5/10)
0 through 9 (IA5 3/0 through 3/9)
! (IA5 2/1)
% (IA5 2/5)
- (IA5 2/13)
. (IA5 2/14)
/ (IA5 2/15)
: (IA5 3/10)
_ (IA5 5/15)
The first character following the "+" is an alphabetic character in the range of "A" through "Z". This first character generally
implies the application in which a command is used (e.g., F for Fax or V for voice).
The modem considers lower-case characters to be the same as their upper-case equivalents.
2.4.2 Values
When subparameters are associated with the execution of an action, or when setting a parameter, the command may include
specification of values. This is indicated by the appearance of <value> in the descriptions below.
<value> consists of either a numeric constant or a string constant.
2.4.2.1 Numeric Constants
Numeric constants are expressed in decimal, hexadecimal, or binary.
Decimal numeric constants consist of a sequence of one or more of the characters "0" through "9", inclusive.
Hexadecimal numeric constants consist of a sequence of one or more of the characters "0" through "9", inclusive, and "A"
through "F" inclusive. The characters "A" through "F" represent the equivalent decimal values 10 through 15.
Binary numeric constants consist of a sequence of one or more of the characters "0" and "1".
In all numeric constants, the most significant digit is specified first. Leading "0" characters are ignored by the modem. No
spaces, hyphens, periods, commas, parentheses, or other generally-accepted numeric formatting characters are permitted in
numeric constants; note in particular that no "H" suffix is appended to the end of hexadecimal constants.
2.4.2.2 String Constants
String constants consist of a sequence of displayable IA5 characters, each in the range from 2/0 to 7/15, inclusive, except for
the characters ‘"’ (IA5 2/2) and "\" (IA5 5/12). String constants are bounded at the beginning and end by the double-quote
character (‘"’, IA5 2/2).
Any character value may be included in the string by representing it as a backslash ("\") character followed by two
hexadecimal digits. For example, "\0D" is a string consisting of the single character <CR> (IA5 0/13). If the "\" character itself
is to be represented in a string, it is encoded as "\5C". The double-quote character, used as the beginning and ending string
delimiter, is represented within a string constant as "\22".
A "null" string constant, or a string constant of zero length, is represented by two adjacent delimiters ("").
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2.4.2.3 Compound Values
Actions may have more than one subparameter associated with them, and parameters may have more than one value. These
are known as "compound values", and their treatment is the same in both actions and parameters.
A compound value consists of any combination of numeric and string values (as defined in the description of the action or
parameter). The comma character must be included as a separator, before the second and all subsequent values in the
compound value. If a value is not specified (i.e., defaults assumed), the required comma separator must be specified;
however, trailing comma characters may be omitted if all associated values are also omitted.
2.4.3 Action Commands
2.4.3.1 Action Execution Command Syntax
There are two general types of action commands: those that have associated subparameter values that affect only that
invocation of the command, and those that have no subparameters.
If subparameters are associated with a command, the definition of the action command indicates, for each subparameter,
whether the specification of a value for that subparameter is mandatory or optional. For optional subparameters, the definition
indicates the assumed (default) value for the subparameter if no value is specified for that subparameter; the assumed value
may be either a previous value (i.e., the value of an omitted subparameter remains the same as the previous invocation of the
same command, or is determined by a separate parameter or other mechanism), or a fixed value (e.g., the value of an
omitted subparameter is assumed to be zero). Generally, the default value for numeric subparameters is 0, and the default
value for string subparameters is "" (empty string).
The following syntax is used for actions that have no subparameters:
+<name>
The following syntax is used for actions that have one subparameter:
+<name>[=<value>]
The following syntax is used for actions that have two or more subparameters:
+<name>[=<compound_value>]
For actions that accept subparameters, if all subparameters are defined as being optional, and the default values for all
subparameters are satisfactory, the data terminal equipment (DTE) may use the first syntax above (i.e., omit the "=" from the
action execution command as well as all of the subparameter value string).
If all other relevant criteria are met (e.g., the modem is in the proper state), the command is executed with any indicated
subparameters. If <name> is not recognized, the modem issues the ERROR result code and terminates processing of the
command line. An ERROR is also generated if a subparameter is specified for an action that does not accept subparameters,
if too many subparameters are specified, if a mandatory subparameter is not specified, if a value is specified of the wrong
type, or if a value is specified that is not within the supported range.
2.4.3.2 Action Test Command Syntax
The DTE may test if an action command is implemented in the modem by using the syntax:
+<name>=?
If the modem does not recognize the indicated name, it returns an ERROR result code and terminates processing of the
command line. If the modem does recognize the action name, it returns an OK result code. If the named action accepts one
or more subparameters, the modem sends an information text response to the DTE, prior to the OK result code, specifying
the values supported by the modem for each such subparameter, and possibly additional information. The format of this
information text is defined for each action command.
2.4.4 Parameter Commands
2.4.4.1 Parameter Types
Parameters may be defined as "read-only" or "read-write". "Read-only" parameters are used to provide status or identifying
information to the DTE, but cannot be set by the DTE; attempting to set their value is an error. In some cases (specified in the
description of the individual parameter), the modem may ignore attempts to set the value of such parameters rather than
respond with an ERROR result code, if the continued correct operation of the interface between the modem and DTE will not
be affected by such action. Read-only parameters may be read and tested.
"Read-write" parameters may be set by the DTE, to store a value or values for later use. Read-write parameters may be set,
read, and tested.
Parameters may take either a single value, or multiple (compound) values. Each value may be either numeric or string; the
definition of the parameter will specify the type of value for each subparameter. Attempting to store a string value in a numeric
parameter, or a numeric value in a string parameter, is an error.
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2.4.4.2 Parameter Set Command Syntax
The definition of the parameter indicates, for each value, whether the specification of that value is mandatory or optional. For
optional values, the definition indicates the assumed (default) value if none is specified; the assumed value may be either a
previous value (i.e., the value of an omitted subparameter retains its previous value), or a fixed value (e.g., the value of an
omitted subparameter is assumed to be zero). Generally, the default value for numeric parameters is 0, and the default value
for string parameters is "" (empty string).
The following syntax is used for parameters that accept a single value:
+<name>=[<value>]
The following syntax is used for parameters that accept more than one value:
+<name>=[<compound_value>]
For each implemented parameter, if all mandatory values are specified, and all values are valid according to the definition of
the parameter, the specified values are stored. If <name> is not recognized, one or more mandatory values are omitted, or
one or more values are of the wrong type or outside the permitted range, the modem issues the ERROR result code and
terminates processing of the command line. An ERROR is also generated if too many values are specified. In case of an
error, all previous values of the parameter are unaffected.
2.4.4.3 Parameter Read Command Syntax
The DTE may determine the current value or values stored in a parameter by using the following syntax:
+<name>?
The modem responds by sending the current values stored for the parameter to the DTE in an information text response. The
format of this response is described in the definition of the parameter. Generally, the values are sent in the same form in
which they would be issued by the DTE in a parameter setting command; if multiple values are supported, they will generally
be separated by commas, as in a parameter setting command.
2.4.4.4 Parameter Test Command Syntax
The DTE may test if a parameter is implemented in the modem, and determine the supported values, by using the syntax:
+<name>=?
If the modem does not recognize the indicated name, it returns an ERROR result code and terminates processing of the
command line. If the modem does recognize the parameter name, it returns an information text response to the DTE, followed
by an OK result code. The information text response indicates the values supported by the modem for each such
subparameter, and possibly additional information. The format of this information text is defined for each parameter.
2.4.5 Additional Syntax Rules
2.4.5.1 Concatenating Commands after Extended Syntax Commands
Additional commands may follow an extended-syntax command on the same command line if a semicolon (";") is inserted
after the preceding extended command as a separator. The semicolon is not necessary when the extended syntax command
is the last command on the command line.
2.4.5.2 Concatenating Commands after Basic Format Commands
Extended syntax commands may appear on the same command line after a basic syntax command without a separator, in
the same manner as concatenation of basic syntax commands.
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2.5 Issuing Commands
All characters in a command line must be issued at the same data rate, and with the same parity and format.
The modem will ignore any command line that is not properly terminated. The modem may consider 30 seconds of mark idle
time between any two characters as an improperly terminated command line. In this case the modem may or may not
generate an ERROR message. The modem will ignore any characters received from the DTE that are not part of a properlyformatted command line.
If the maximum number of characters that the modem can accept in the body is exceeded, an ERROR result code is
generated after the command line is terminated.
The DTE will not begin issuing a subsequent command line until at least one-tenth of a second has elapsed after receipt of
the entire result code issued by the modem in response to the preceding command line.
2.6 Executing Commands
Upon receipt of the termination character, the modem commences execution of the commands in the command line in the
order received from the DTE. Should execution of a command result in an error, or a character be not recognized as a valid
command, execution is terminated, the remainder of the command line is ignored, and the ERROR result code is issued.
Otherwise, if all commands execute correctly, only the result code associated with the last command is issued; result codes
for preceding commands are suppressed. If no commands appear in the command line, the OK result code is issued.
2.6.1 Aborting Commands
Some action commands that require time to execute may be aborted while in progress; these are explicitly noted in the
description of the command. Aborting of commands is accomplished by the transmission from the DTE to the modem of any
character. A single character is sufficient to abort the command in progress; however, characters transmitted during the first
125 milliseconds after transmission of the termination character are ignored (to allow for the DTE to append additional control
characters such as line feed after the command line termination character).
recognized by the modem, it should be sent at the same rate as the preceding command line; the modem may ignore
characters sent at other rates.
command in progress and returns an appropriate result code to the DTE, as specified for the particular command.
When such an aborting event is recognized by the modem, the modem terminates the
To ensure that the aborting character is
2.6.2 Handling of Invalid Numbers and S-Parameter Values
The modem reacts to undefined numbers and S-parameter values in one of three ways:
1. Issue the ERROR result code, and leave the previous value of the parameter unchanged;
2. Issue the OK result code, and leave the previous value of the parameter unchanged; or,
3. Issue the OK result code, and set the parameter value to the valid value nearest to that specified in the command line.
The description of each command specifies which of these three techniques is used to handle invalid parameter values for
that command or parameter.
2.7 Modem Responses
While in command state and online command state, the modem will issue responses using the same rate, word length, and
parity as the most recently received DTE command line. In the event that no DTE command has yet been received, rate, word
length, and parity used will depend on the capabilities of the modem.
When the modem transitions from the command state or online command state to the online data state, the result code
CONNECT
online data state to the command state or online command state, the result codes should be issued at the bit rate used during
the online data state. Thereafter, any unsolicited result codes should use the bit rate and parity of the last command line
issued by the DTE to the modem.
The characters of a response will be contiguous, with no more than 100 milliseconds of mark idle issued between characters
in addition to stop elements.
should be issued at the bit rate and parity used during the command state. When the modem transitions from the
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2.7.1 Responses
There are two types of responses that may be issued by the modem: information text and result codes.
Information Text.
1. The characters transmitted for the header are determined by the V command.
2. The trailer consists of two characters, being the character having the ordinal value of parameter S3 followed by the
character having the ordinal value of parameter S4.
3. Information text usually consists of a single line; information text returned in response to some commands may contain
multiple lines, and the text may therefore include CR, LF, and other formatting characters to improve readability.
Result Code Parts.
1. The characters transmitted for the header and trailer are determined by the V command setting.
2. The result text may be transmitted as a number or as a string, also depending on a the V command setting.
Result Code Types.
Section 3.5.
1. A final result code indicates the completion of a full modem action and a ability to accept new commands from the DTE.
2. An intermediate result code is a report of the progress of an modem action. The CONNECT result code is an
intermediate result code. In the case of a dialing or answering command, the modem switches from command state to
online data state, and issues a CONNECT result code. This is an intermediate result code for the modem because it
cannot accept commands from the DTE while in online data state. When the modem switches back to the command
state it then issues a final result code (such as OK or NO CARRIER).
3. Unsolicited result codes (such as RING) indicate the occurrence of an event not directly associated with the issuance of
a command from the DTE.
Information text responses consist of three parts: a header, information text, and a trailer:
Result codes consist of three parts: a header, the result text, and a trailer.
There are three types of result codes: final, intermediate, and unsolicited. Result codes are described in
2.7.2 Extended Syntax Result Codes
Extended syntax result codes may be issued in response to either basic or extended commands, or both. The appropriate
responses are specified in the definitions of the commands, the responses, or both.
The general format of extended syntax result codes is the same as result codes defined in TIA-602 with regard to headers
and trailers. The characters specified in S-parameters S3 and S4 are used in headers and trailers of extended syntax result
codes as they are in basic format result codes. The setting of the V command affects the headers and trailers associated with
extended syntax result codes in the same manner as basic format result codes; however, unlike basic format result codes,
extended syntax result codes have no numeric equivalent, and are always issued in alphabetic form.
Extended syntax result codes are subject to suppression by the Q1 command, as with basic format result codes. The
issuance of extended syntax result codes are not be affected by the setting of the X command.
Extended syntax result codes may be either final, intermediate, or unsolicited; the type being indicated in the definition of the
result code.
Extended syntax result codes are prefixed by the "+" character to avoid duplication of basic format result codes specified in
TIA-602. Following the "+" character, the name of the result code appears; result code names follow the same rules as
command names.
Extended syntax result codes may include the reporting of values. The definition of the result code specifies whether or not
values are appended to the result code, and, if so, how many, their types, and their assumed default values if omitted.
Data/voice Modes.
+<name>
If a single value is to be reported, the form of the result code is:
+<name>: <value>
A single space character separates the colon character from the <value>; no space appears between the result code name
and the colon. If multiple values are to be reported with the result code, the form is:
+<name>: <compound_value>
Fax Modes.
<value> or (<value>)
When no values are to be reported, the result code appears in the simplest form:
If a single value is to be reported, the form of the result code is:
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2.7.3 +<name>: <compound_value>Information Text Formats for Test Commands
In general, the format of information text returned by extended syntax commands is described in the definition of the
command.
The modem may insert intermediate <CR> characters in very long information text responses in order to avoid overrunning
DTE receive buffers. If intermediate <CR> characters are included, the modem does not include the character sequences "0
<CR>"or "OK<CR>", so that DTE can avoid false detection of the end of these information text responses.
2.7.3.1 Range of Values
When the action accepts a single numeric subparameter, or the parameter accepts only one numeric value, the set of
supported values may be presented in the information text as an ordered list of values. The list is preceded by a left
parenthesis (() , and is followed by a right parenthesis ()). If only a single value is supported, it appears between the
parentheses. If more than one value is supported, then the values may be listed individually, separated by comma characters,
or, when a continuous range of values is supported, by the first value in the range, followed by a hyphen character (-),
followed by the last value in the range. The specification of single values and ranges of values may be intermixed within a
single information text. In all cases, the supported values are indicated in ascending order.
For example, the following are some examples of value range indications:
(0) Only the value 0 is supported.
(1,2,3) The values 1, 2, and 3 are supported.
(1-3) The values 1 through 3 are supported.
(0,4,5,6,9,11,12) The several listed values are supported.
(0,4-6,9,11-12) An alternative expression of the above list.
2.7.3.2 Compound Range of Values
When the action accepts more than one subparameter, or the parameter accepts more than one value, the set of supported
values is presented as a list of the parenthetically-enclosed value range strings described above, separated by commas. For
example, the information text in response to testing an action that accepts three subparameters, and supports various ranges
for each of them, could appear as follows:
(0),(1-3),(0,4-6,9,11-12)
This indicates that the first subparameter accepts only the value 0, the second accepts any value from 1 through 3 inclusive,
and the third subparameter accepts any of the values 0, 4, 5, 6, 9, 11, or 12.
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3. DATA COMMAND SET
3.1 COMMAND GUIDELINES
The commands used to control and report modem operation in data modem mode are defined in this section.
The Data Modem Mode commands and responses described in this section are applicable when command +FCLASS=0.
(See Section 3.2.1.2 for the definition of the FCLASS command.)
The default values are typical of a fully configured modem supporting all data rates and options. The actual default value is
dependent upon installed modem firmware and country specific parameters.
Commands are accepted by the modem once the previous command has been fully executed, which is normally indicated by
the return of an appropriate result code. Execution of commands D and A, either as a result of a direct command or a reexecute command, will be aborted if another character is entered before completion of the handshake.
3.1.1 Escape Code Sequence
When the modem has established a connection and has entered on-line data mode, it is possible to break into the data
transmission in order to issue further commands to the modem in an on-line command mode. This is achieved by the DTE
sending to the modem a sequence of three ASCII characters specified by register S2. The default character is '+'. The
maximum time allowed between receipt of the last character of the three escape character sequence from the DTE and
sending of the OK result code to the DTE is controlled by the S12 register.
3.2 DATA COMMANDS
The modem will respond to the commands detailed below. Parameters applicable to each command are listed with the
command description. The defaults shown for each configuration command are those used in the Conexant factory profile 0.
3.2.1 Generic Modem Control
3.2.1.1 Z - Soft Reset and Restore Profile
This command causes the modem to perform a soft reset and restore (recall) the configuration profile. If no <value> is
specified, zero is assumed.
Syntax
Z<value>
Defined Values
<value> Decimal number corresponding to the selected profile.
0 Soft reset and restore stored profile 0.
1 Soft reset and restore stored profile 1.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
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3.2.1.2 +FCLASS - Select Active Service Class
This command selects the active service class (mode).
Syntax
+FCLASS=<mode>
Defined Values
<mode> Decimal number which corresponds to the selected service class.
0 Select Data Mode (see Section 1). (Default.)
1 Select Facsimile Class 1 Mode. (See Section 3.)
1.0 Select Facsimile Class 1.0 Mode. (See Section 3.)
2 Select Facsimile Class 2 Mode. (See Section 1.)
8 Select Voice Mode. (See Section 5.)
10 Select DataDome. (Fax for Japan.)
Result Codes
OK For <mode> = 0, 1, 1.0, 2, 8, and 10.
ERROR Otherwise.
Reporting Current or Selected Values
Command: +FCLASS?
Response: +FCLASS: <mode>
Example: +FCLASS: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +FCLASS=?
Response: +FCLASS: (<mode> range)
Example: +FCLASS: (0,1,1.0,2,8,10)
3.2.1.3 +VCID - Caller ID (CID)
This command controls the reporting and presentation of data associated with the Caller ID services in the Incoming Call Line
ID (ICLID) data format for the next call.
Syntax
+VCID=<pmode>
Defined Values
<pmode> Decimal number corresponding to the selected option.
0 Disable Caller ID reporting. (Default.)
1 Enables Caller ID with formatted presentation to the DTE. The modem presents
the data items in a <Tag><Value> pair format. The expected pairs are date, time,
name, and caller code (telephone number),
2 Enables Caller ID with unformatted presentation to the DTE.
Reporting Current or Selected Values
Command: +VCID?
Response: +VCID: <pmode>
Example: +VCID: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VCID=?
Response: +VCID: (<pmode> range)
Example: +VCID: (0-2)
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3.2.1.4 +VRID - Report Retrieved Caller ID (CID)
This command reports the data associated with the Caller ID services in the Incoming Call Line ID (ICLID) data format for the
last received call.
Syntax
+VRID=<pmode>
Defined Values
<pmode> Decimal number corresponding to the selected option.
0 Reports Caller ID with formatted presentation to the DTE. The modem presents the
data items in a <Tag><Value> pair format. The expected pairs are date, time,
name, and caller code (telephone number),
1 Reports Caller ID with unformatted presentation to the DTE.
Reporting Supported Range of Parameter Values
Command: +VRID=?
Response: +VRID: (<pmode> range)
Example: +VRID: (0,1)
3.2.1.5 \N - Operating Mode
This command controls the preferred error correcting mode to be negotiated in a subsequent data connection. This command
is affected by the OEM firmware configuration.
Syntax
\N<mode>
Defined Values
<mode> Decimal number which corresponds to the selected mode.
0 Selects normal speed buffered mode (disables error-correction mode). (Forces
&Q6.)
1 Serial interface selected - Selects direct mode and is equivalent to &M0, &Q0
mode of operation. (Forces &Q0.)
Parallel interface selected - Same as \N0.
2 Selects reliable (error-correction) mode. The modem will first attempt a LAPM
connection and then an MNP connection. Failure to make a reliable connection
results in the modem hanging up. (Forces &Q5, S36=4, and S48=7.)
3 Selects auto reliable mode. This operates the same as \N2 except failure to make
a reliable connection results in the modem falling back to the speed buffered
normal mode. (Forces &Q5, S36=7, and S48=7.)
4 Selects LAPM error-correction mode. Failure to make an LAPM error-correction
connection results in the modem hanging up. (Forces &Q5 and S48=0.) Note: The
-K1 command can override the \N4 command.
5 Selects MNP error-correction mode. Failure to make an MNP error-correction
connection results in the modem hanging up. (Forces &Q5, S36=4, and S48=128.)
Result Codes
OK <mode> = 0 to 5.
ERROR Otherwise.
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3.2.1.6 -SMS= - Select Mode
Selects Data mode, DSVD (digital simultaneous voice and data) mode, or enables automatic mode selection.
Syntax
-SMS<mode>
Defined Values
<mode> Decimal number corresponding to the selected mode or automatic mode select enable.
0 Data mode. (Default.)
1 DSVD mode (a modem not supporting DSVD will respond with ERROR).
2 Reserved (will respond with ERROR).
3 Automatic modem select (DSVD mode/Data mode).
Notes
DSVD is a technology that allows simultaneous voice and data operation using a Conexant modem connected to a telephone
line. Voice and data channels are combined in the digital domain for DSVD.
Establishing a DSVD connection is analogous to establishing a regular data modem connection. Initiate the call using normal
dialing (ATD) and answering (ATA) procedures. The modem can switch from a regular phone conversation into DSVD mode
and back to phone conversation. A handset, headset, or microphone/speaker can be used for voice communication during
DSVD mode.
DSVD requires a V.34 mode or faster connection.
Reporting Selected Options
The modem reports the selected options in response to the following command:
-SMS?
The response is:
<mode>
Example:
-SMS?
0
Reporting Supported Options
The modem reports the supported options in response to the following command:
-SMS=?
The response is:
(list of<mode> values)
Example:
-SMS=?
(0 or 1)
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3.2.1.7 I - Identification
This command causes the modem to reports the requested result according to the command parameter.
Syntax
I<value>
Defined Values
<value> Decimal number corresponding to the selected information.
0 Reports product code, e.g., “56000”.
1 Reports the least significant byte of the stored checksum in decimal (see firmware
release notes). Reports 255 if the prestored checksum value is FFh.
2 Reports "OK".
3 Reports identification codes in the form RevisionName-Modulation_Model, where:
RevisionName = Product family name_firmware version. The product family
name is ACF3 for SmartSCM, SmartACFL, and SmartSCM.
The firmware version is in the form VX.XXX. For example:
ACF3_V1.200
Modulation = V90, V34, or V32 for V.90, V.34, or V.32bis, respectively
Model = Typical models are:
2M_SCF Serial and parallel interface in ROM
2M_RAM_SCF Serial and parallel interface in RAM.
1M_RAM_SCF Serial and parallel interface in 1M RAM
Examples: ACF3_V1.200-V90_2M_SCF
ACF3_V1.200-V34_1M_RAM_SCF
NOTE:
4 Reports OEM defined identifier string in either Hayes-compatible binary format
(default) or ASCII format (selectable by ConfigurACE), e.g.:
5 Reports Country Code parameter (see +GCI command), e.g., B5.
6 Reports modem data pump model and internal code revision, e.g.,
“RCV56DPF-PLL L8773A Rev 14.00/34.00”.
7 Reports “OK”.
If RPI+ is enabled (see +Hn command),
“ROCKWELL RPI (TM)+01” is appended.
a007040284C6002F
bC60000000
r1005111151012000
r3000111170000000
Result Codes
OK <value> = 0 - 7.
ERROR Otherwise.
3.2.1.8 +GMI - Request Manufacturer Identification
This command causes the modem to report the modem product manufacturer.
Syntax
+GMI
Typical Response
+GMI: CONEXANT
OK
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3.2.1.9 +GMI9 - Request Conexant Identification
This command causes the modem to report CONEXANT ACF identification. The response cannot be modified using
ConfigurACE.
Syntax
+GMI9
Response
+GMI9: CONEXANT ACF
OK
3.2.1.10 +GMM - Request Model Identification
This command causes the modem to report the modem product.
Syntax
+GMM
Typical Response
+GMM: V90
3.2.1.11 +GMR - Request Revision Identification
This command causes the modem to report the modem version, revision level or date. This is the same as the I3 command.
Syntax
+GMR
Typical Response
+GMR: P2109-V90
OK
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3.2.1.12 +GCAP - Request Complete Capabilities List
This extended-format command causes the modem to transmit one or more lines of information text listing additional
capabilities command +<name>s , which is intended to permit the user to identify the overall capabilities of the modem. In
particular, if the modem implements a particular modem control standard that uses Extended Syntax Commands, and if that
modem control standard includes command(s) that indicate general capabilities, the +<names>(s) of those commands will be
reported to the modem in response to a +GCAP command.
Syntax
+GCAP
Example Responses
+GCAP: +FCLASS, +MS, +ES, +DS, for a data modem that supports all capabilities listed
Where:
+FCLASS T.class1, +F (Class 1 Facsimile modem Control)
+MS +M commands (Modulation Control: +MS and +MR commands)
+ES +E commands (Error Control: +ES, +EB, +ER, +EFCS, +ETBM)
+DS +D commands (Data Compression: +DS and +DR)
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3.2.1.13 +GCI - Country of Installation
This extended syntax command selects and indicates the country of installation for the modem. This parameter selects the
settings for any operational parameters that need to be adjusted for national regulations or telephone networks.
Syntax
+GCI=<country_code>
Defined Values
<country_code> 8-bit country code from Annex A of T.35. The value is the hexadecimal equivalent of the T.35
code, with bit 8 treated as the most significant bit and bit 1 treated as the least significant bit.
The supported countries are:
Country Code Country Code Country Code
Australia 09 Hong Kong 50 Norway 82
Austria 0A Hungary 51 Philippines 89
Belgium 0F India 53 Poland 8A
Brazil 16 Ireland 57 Portugal 8B
Bulgaria 1B Israel 58 Russia B8
Canada 20 Italy 59 Singapore 9C
China 26 Japan 00 South Africa 9F
Czech and Slovak
Federal Republic
Denmark 31 Luxembourg 69 Sweden A5
Finland 3C Malaysia 6C Switzerland A6
France 3D Mexico 73 Taiwan FE
Germany 42 Netherlands 7B United Kingdom B4
Greece 46 New Zealand 7E United States B5
2E Korea 61 Spain A0
Default
If the modem is specified for use in only one country, that country code is the default. Otherwise, the default is defined by the
OEM. Factory default is B5 (United States).
Reporting Current or Selected Values
Command: +GCI?
Response: +GCI: <current country_code>
Example: +GCI: 3D indicates that the modem is set for France.
Reporting Supported Range of Parameter Values
Command: +GCI=?
Response: +GCI: (<country_code>[,<country_code>[,<country_code].......]]
Example: +GCI: (20,73,B5) The modem can be set for Canada, Mexico or the United States.
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3.2.1.14 &F - Restore Factory Configuration (Profile)
The modem loads the factory default configuration (profile). The factory defaults are identified for each command and in the
S-Parameter descriptions. A configuration (profile) consists of a subset of S-Parameters.
Syntax
&F[<value>]
Defined Values
<value> Decimal number corresponding to the selected configuration.
0 Restore factory configuration 0.
1 Restore factory configuration 1.
Result Codes
OK
ERROR If the modem is connected.
3.2.1.15 &T - Local Analog Loopback Test
The modem will perform the local analog loopback test if &T1 is selected. The test can be run only when in an asynchronous
operation in non-error-correction mode (normal), e.g., AT&Q6. To terminate the test in progress, the escape sequence must
be entered first (see Section 3.1.1).
Syntax
&T[<value>]
Defined Values
<value> Decimal number corresponding to the selected option.
0 Terminates test in progress. Clears S16.
1 Initiates local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a connection exists
when this command is issued, the modem hangs up. The CONNECT XXXX
message is displayed upon the start of the test.
3.2.1.16 &Y - Designate a Default Reset Profile
This command selects which user profile will be used after a hard reset.
Syntax
&Y<value>
Defined Values
<value> Decimal number corresponding to the selected profile.
0 The modem will use profile 0.
1 The modem will use profile 1.
Result Codes
OK <value> = 0 to 1.
ERROR If <value> > 1, or if NVRAM is not installed or is not operational.
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3.2.1.17 &W - Store Current Configuration
Saves the current (active) configuration (profile), including S-Parameters, in one of the two user profiles in NVRAM as
denoted by the parameter value. This command will yield an ERROR message if the NVRAM is not installed or is not
operational as detected by the NVRAM test.
The current configuration is comprised of a list of storable parameters illustrated in the &V command. These settings are
restored to the active configuration upon receiving a Zn command or at power up (see &Yn command).
Syntax
&W<value>
Defined Values
<value> Decimal number corresponding to the selected profile.
0 Store the current configuration as profile 0.
1 Store the current configuration as profile 1.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
3.2.1.18 &Zn=x - Store Telephone Number
The modem can store up to four telephone numbers and each telephone number dial string can contain up to 31 digits.
(Requires 256-byte NVRAM installed.)
Syntax
&Z<value>
Defined Values
<value> Decimal number from 0 to 3 corresponding to the selected telephone number.
<string> Dial string from 0 to 31 characters.
Result Codes
OK For <value> ≤ 3, and <string> ≤ 31 digits.
ERROR If <value> > 3, <string> > 31 digits, or if NVRAM is not installed or is not operational.
3.2.1.19 %7 - Plug and Play Serial Number
Sets and stores eight serial numbers in hex format used for serial Plug and Play and for ISA Plug and Play which use the
Conexant 11596 Plug and Play device. Applicable to Desktop configuration only.
Syntax
%7<8 hex numbers><same 8 hex numbers>
Example
%7<8 hex numbers><same 8 hex numbers>
Result Codes
OK <8 hex numbers><same 8 hex numbers>
ERROR Otherwise
To display the stored serial number, issue AT"?<cr>.
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3.2.1.20 %8 - Plug and Play Vendor ID and Product Number
Sets and stores Vendor ID and product number for serial Plug and Play and for ISA Plug and Play which use the Conexant
11596 Plug and Play device. Applicable to Desktop configuration only.
Syntax
&8<3 ASCII characters><4 hex numbers><same 3 ASCII characters><same 4 hex numbers><cr>
Example
%8<3 ASCII characters><4 hex numbers><same 3 ASCII characters><same 4 hex numbers><cr>
Result Codes
OK <3 ASCII characters><4 hex numbers><same 3 ASCII characters><same 4 hex numbers>
ERROR Otherwise
3.2.1.21 **- Load Flash Memory
The linear flash memory uploader allows flash memory connected to the modem external memory bus to be upgraded with
revised modem firmware. This process transfers (uploads) the upgraded modem firmware (data) from the host computer to
the modem which transfers the data to the flash memory device. The linear flash memory downloader allows the flash
memory connected to the modem external memory bus to read and saved. This process transfers (downloads) the current
modem firmware (data) to the host computer. Uploading new firmware to the flash memory or downloading existing firmware
from the flash memory device is a two-step process.
1. When the AT** command is issued, the modem firmware boot loader is invoked and the user will first load a flash load
module (FLM) into the modem's RAM. If the user wishes to upload new firmware to the modem, he should load the
uploader FLM. If the user wishes to download existing firmware from the modem, he should load the downloader FLM. In
either case, the data transfer is done via an ASCII transfer. The FLM contains the programming algorithm for the flash
memory device being programmed and any messages that may be sent during the load process.
2. If the user wishes to upload new firmware to the modem, then he will then load the new modem firmware which the
uploader FLM will then program into the flash memory device. This transfer is done via XMODEM transfer. If the user
wishes to download existing firmware from the modem, then he will set up the host PC for XMODEM receive and the
downloader FLM will begin to send the existing firmware from the flash memory to the host PC.
Procedure:
1. Install in the modem a flash memory programmed with the modem firmware or a blank flash memory.
2. Put the uploader FLM and downloader FLM files and the new modem firmware file (e.g., XmUL003.s37, XmDL003.s37,
and 206s4712.S37) in an appropriate directory on the computer's hard disk.
3. Configure the communications application program for a DTE rate of between 9600 bps and 115200 bps and RTS/CTS
flow control.
4. Check the modem for response by typing AT.
5. Initiate the download process using the AT** command. The "Download flash code…" message appears upon issuing the
AT** command.
6. Perform an ASCII transfer of the FLM file (e.g., XmUL003.s37 for uploading new firmware to the modem or XmDL003.s37
for downloading existing firmware from the modem) from the host computer to the modem RAM using an industry
standard communications software or an equivalent process (ensure that all ASCII translation or pacing is turned off).
7. After the FLM has been loaded, if uploading new firmware to the modem, perform an XMODEM upload of the new
modem firmware hex file (e.g., 206s4712.S37) from the host computer to the modem RAM using an industry standard
communications software or an equivalent process. If downloading existing firmware from the modem, using an industry
standard communications software or equivalent, put the host PC in XMODEM receive mode.
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8. The following messages may occur during the uploading process:
Message Description
Device not supported Displayed if the FLM used does not support the flash memory that is installed on the board.
Wrong S37 format Displayed if the modem firmware being uploaded is not in Motorola S3 format.
Record error Displayed if there is an error while either uploading or downloading. If this occurs, the
transfer should be aborted, and the user should restart at step 5.
Download abort Displayed if the transfer is aborted before it is finished. If this occurs, the user should restart
at step 5.
Erase fail Displayed if the FLM is unable to erase the flash memory. If this occurs, the user should
restart at step 5.
Download error, Re-Load Displayed if there was an error when uploading or downloading. If this occurs, the user
should restart at step 5.
Error, No H/W flow ctl Displayed if RTS-CTS flow control is not set. If this occurs, the user should restart at step 3.
DTE timeout Displayed if the DTE has stopped the XMODEM transfer process before it is finished. If this
occurs, the user should restart at step 5.
Code doesn’t match
hardware
Device successfully
programmed
Displayed if the user is attempting to upload a firmware that either not the same model
(parallel, serial, etc.), crystal frequency, or size (1Mbit, 2Mbit, etc.) as the firmware that is
currently on the board. If this occurs, the FLM will abort and not allow the user to continue.
Displayed by the FLM at the completion of a successful upload or download then the modem
will do a cold start.
The uploader and downloader flash load modules (FLM) have several built in safety mechanisms to reduce the risk of a failed
flash upload/download. The FLM will not allow a user to upload a firmware of different model (serial, parallel, etc.) or crystal
speed than what is currently in the flash memory. Also, it will not allow the user to upload a firmware that is larger in size than
the flash memory itself (e.g., a 2Mbit firmware onto a 1Mbit flash memory). It will, however, allow the user to upload a
firmware that is smaller in size than the flash memory, and it will program the firmware with the appropriate offset in order for
the firmware to function properly. In the instance that there is a failure during the download or upload process, the modem will
be in a “flash rescue mode”. In this mode, the modem will respond “OK” to all AT commands, but will only take action on the
AT** command, so a new attempt to upload or download can be initiated. When the modem is in the “flash rescue mode” it
will only be able to respond to AT commands if the DTE rate has not been changed since the last AT** command was
successfully issued, even if the modem is powered off and on.
3.2.2 DTE-Modem Interface commands
The parameters defined in this section control the operation of the interface between the DTE and modem.
3.2.2.1 E - Command Echo
The modem enables or disables the echo of characters to the DTE. The parameter value, if valid, is written to S14 bit 1.
Syntax
E<value>
Defined Values
<value> Decimal number corresponding to the option.
0 Disables command echo.
1 Enables command echo. (Default.)
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
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3.2.2.2 Q - Quiet Results Codes Control
The command enables or disables the sending of result codes to the DTE. The parameter value, if valid, is written to S14 bit
2.
Syntax
Q<value>
Defined Values
<value> Decimal number corresponding to the option.
0 Enables result codes to the DTE. (Default.)
1 Disables result codes to the DTE.
Result Codes
OK <value>= 0 or 1.
ERROR Otherwise.
3.2.2.3 V - Result Code Form
This command selects the sending of short-form or long-form result codes to the DTE. The parameter, if valid, is written to
S14 bit 3.
Syntax
V<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Enables short-form (terse) result codes. Line feed is not issued before a short-form
result code.
1 Enables long-form (verbose) result codes. (Default.)
Result Codes
OK <value>= 0 or 1.
ERROR Otherwise.
3.2.2.4 W - Connect Message Control
This command, in conjunction with S95 bits 0, 2, 3, and 5 (bits 2, 3, and 5 can be written directly by the host or by the +MR,
+ER, and +DR commands, respectively), control the format of CONNECT messages (see Section 3.5 and Table 3-15). The
actual result code messages reported reflect the W command setting and the S95 bit settings. (Also see +MR, +ER, and +DR
commands.)
The W parameter value, if valid, is written to S31 bits 2 and 3.
Syntax
W<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Upon connection, the modem reports only the DTE speed (e.g., CONNECT
19200). Subsequent responses are disabled. (Default.)
1 Upon connection, the modem reports the modulation, line speed, the error
correction protocol, and the DTE speed, respectively. Subsequent responses are
disabled.
2 Upon connection, the modem reports the DCE speed (e.g., CONNECT 14400).
Subsequent responses are disabled.
Result Codes
OK <value> = 0, 1, or 2.
ERROR Otherwise.
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3.2.2.5 X - Extended Result Codes
This command selects the subset of the result code messages used by the modem to inform the DTE of the results of
commands.
Blind dialing is enabled or disabled by country parameters. If the user wishes to enforce dial tone detection, a "W" can be
placed in the dial string (see D command). The information below is based upon the default implementation of the X results
table. Table 3-1 indicates the messages which are enabled for each X value.
If the modem is in facsimile mode (+FCLASS=1, 1.0, or 2), the only message sent to indicate a connection is CONNECT
without a speed indication.
Syntax
X<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disables reporting of busy tones unless forced otherwise by country requirements;
send only OK, CONNECT, RING, NO CARRIER, ERROR, and NO ANSWER
result codes. Blind dialing is enabled/disabled by country parameters. If busy tone
detection is enforced and busy tone is detected, NO CARRIER will be reported. If
dial tone detection is enforced or selected and dial tone is not detected, NO
CARRIER will be reported instead of NO DIAL TONE. The value 000b is written to
S22 bits 6, 5, and 4, respectively.
1 Disables reporting of busy tones unless forced otherwise by country requirements;
send only OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, and
CONNECT XXXX (XXXX = rate). Blind dialing enabled/disabled by country
parameters. If busy tone detection is enforced and busy tone is detected, NO
CARRIER will be reported instead of BUSY. If dial tone detection is enforced or
selected and dial tone is not detected, NO CARRIER will be reported instead of NO
DIAL TONE. The value 100b is written to S22 bits 6, 5, and 4, respectively.
2 Disables reporting of busy tones unless forced otherwise by country requirements;
send only OK, CONNECT, RING, NO CARRIER, ERROR, NO DIAL TONE, NO
ANSWER, and CONNECT XXXX. If busy tone detection is enforced and busy tone
is detected, NO CARRIER will be reported instead of BUSY. If dial tone detection
is enforced or selected and dial tone is not detected, NO DIAL TONE will be
reported instead of NO CARRIER. The value 101b is written to S22 bits 6, 5, and
4, respectively.
3 Enables reporting of busy tones; send only OK, CONNECT, RING, NO CARRIER,
ERROR, NO ANSWER, and CONNECT XXXX. Blind dialing is enabled/disabled by
country parameters. If dial tone detection is enforced and dial tone is not detected,
NO CARRIER will be reported. The value 110b is written to S22 bits 6, 5, and 4,
respectively.
4 Enables reporting of busy tones; send all messages. The value 111b is written to
S22 bits 6, 5, and 4, respectively. (Default.)
Result Codes
OK <value> = 0 to 4.
ERROR Otherwise.
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Table 3-1. Result Codes
Short Form Long Form n Value in ATXn Command Notes
01234
+F4+FCERROR xxxxx
0 OK xxxxx
1 CONNECT xxxxx
2 RING xxxxx
3 NO CARRIER xxxxx
4 ERROR xxxxx
5 CONNECT 1200 1 xxxx
6 NO DIAL TONE 33xxx
7 BUSY 333xx
8 NO ANSWER xxxxx
9 CONNECT 600 1xxxx
10 CONNECT 2400 1 xxxx
11 CONNECT 4800 1 xxxx
12 CONNECT 9600 1 xxxx
13 CONNECT 7200 1 xxxx
14 CONNECT 12000 1 xxxx
15 CONNECT 14400 1 xxxx
16 CONNECT 19200 1 xxxx
17 CONNECT 38400 1 xxxx
18 CONNECT 57600 1 xxxx
19 CONNECT 115200 1 xxxx
20 CONNECT 230400 xxxxx
22 CONNECT 75TX/1200RX 1 xxxx
23 CONNECT 1200TX/75RX 1 xxxx
24 DELAYED 4444x
32BLACKLISTED 4444x
33FAX xxxxx
35DATA xxxxx
40+MRR: 300 xxxxx
44 +MRR: 1200/75 xxxxx
45 +MRR: 75/1200 xxxxx
46 +MRR: 1200 xxxxx
47 +MRR: 2400 xxxxx
48 +MRR: 4800 xxxxx
49 +MRR: 7200 xxxxx
50 +MRR: 9600 xxxxx
51 +MRR: 12000 xxxxx
52 +MRR: 14400 xxxxx
53 +MRR: 16800 xxxxxNote 2
54 +MRR: 19200 xxxxxNote 2
55 +MRR: 21600 xxxxxNote 2
56 +MRR: 24000 xxxxxNote 2
57 +MRR: 26400 xxxxxNote 2
58 +MRR: 28800 xxxxxNote 2
59 CONNECT 16800 1 xxxxNote 2
61 CONNECT 21600 1 xxxxNote 2
62 CONNECT 24000 1 xxxxNote 2
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Table 3-1. Result Codes (Continued)
Short Form Long Form n Value in ATXn Command Notes
01234
63 CONNECT 26400 1 x x x x Note 2
64 CONNECT 28800 1 x x x x Note 2
66+DR: ALT xxxxx
67+DR: V42B xxxxx
69+DR: NONE xxxxx
70+ER: NONE xxxxx
77+ER: LAPM xxxxx
78 +MRR: 31200 xxxxxNote 2
79 +MRR: 33600 xxxxxNote 2
80+ER: ALT xxxxx
81+ER: ALT-CELLULAR xxxxx
83LINE-IN-USE xxxxx
84 CONNECT 33600 1 x x x x Note 2
91 CONNECT 31200 1 x x x x Note 2
134+MCR: B103 xxxxx
135+MCR: B212 xxxxx
136+MCR: V21 xxxxx
137+MCR: V22 xxxxx
138+MCR: V22B xxxxx
139+MCR: V23 xxxxx
140+MCR: V32 xxxxx
141+MCR: V32B xxxxx
142+MCR: V34 xxxxxNote 3
144+MCR: K56 xxxxxNote 3
145+MCR: V90 xxxxxNote 3
150 +MRR: 32000 xxxxxNote 3
151 +MRR: 34000 xxxxxNote 3
152 +MRR: 36000 xxxxxNote 3
153 +MRR: 38000 xxxxxNote 3
154 +MRR: 40000 xxxxxNote 3
155 +MRR: 42000 xxxxxNote 3
156 +MRR: 44000 xxxxxNote 3
157 +MRR: 46000 xxxxxNote 3
158 +MRR: 48000 xxxxxNote 3
159 +MRR: 50000 xxxxxNote 3
160 +MRR: 52000 xxxxxNote 3
161 +MRR: 54000 xxxxxNote 3
162 +MRR: 56000 xxxxxNote 3
165 CONNECT 32000 xxxxxNote 3
166 CONNECT 34000 xxxxxNote 3
167 CONNECT 36000 xxxxxNote 3
168 CONNECT 38000 xxxxxNote 3
169 CONNECT 40000 xxxxxNote 3
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Table 3-1. Result Codes (Continued)
Short Form Long Form n Value in ATXn Command Notes
01234
170 CONNECT 42000 xxxxxNote 3
171 CONNECT 44000 xxxxxNote 3
172 CONNECT 46000 xxxxxNote 3
173 CONNECT 48000 xxxxxNote 3
174 CONNECT 50000 xxxxxNote 3
175 CONNECT 52000 xxxxxNote 3
176 CONNECT 54000 xxxxxNote 3
177 CONNECT 56000 xxxxxNote 3
178 CONNECT 230400 xxxxx
180 CONNECT 28000 xxxxxNote 3
181 CONNECT 29333 xxxxxNote 3
182 CONNECT 30667 xxxxxNote 3
183 CONNECT 33333 xxxxxNote 3
184 CONNECT 34667 xxxxxNote 3
185 CONNECT 37333 xxxxxNote 3
186 CONNECT 38667 xxxxxNote 3
187 CONNECT 41333 xxxxxNote 3
188 CONNECT 42667 xxxxxNote 3
189 CONNECT 45333 xxxxxNote 3
190 CONNECT 46667 xxxxxNote 3
191 CONNECT 49333 xxxxxNote 3
192 CONNECT 50667 xxxxxNote 3
193 CONNECT 53333 xxxxxNote 3
194 CONNECT 54667 xxxxxNote 3
195 +MRR: 28000 xxxxxNote 3
196 +MRR: 29333 xxxxxNote 3
197 +MRR: 30667 xxxxxNote 3
198 +MRR: 33333 xxxxxNote 3
199 +MRR: 34667 xxxxxNote 3
200 +MRR: 37333 xxxxxNote 3
201 +MRR: 38667 xxxxxNote 3
202 +MRR: 41333 xxxxxNote 3
203 +MRR: 42667 xxxxxNote 3
204 +MRR: 45333 xxxxxNote 3
205 +MRR: 46667 xxxxxNote 3
206 +MRR: 49333 xxxxxNote 3
207 +MRR: 50667 xxxxxNote 3
208 +MRR: 53333 xxxxxNote 3
209 +MRR: 54667 xxxxxNote 3
Notes:
1. An 'x' in a column indicates that the message (either the long form if verbose, or the value only for short form) will be
generated when that particular value of 'n' (shown at the top of the column) has been selected by the use of ATXn. If
the column is blank, then no message will be generated for that x option. A numeral indicates which less explicit
message (verbose or short form) will be output for that X option. (Also, see Section 3.3).
2. RC336 and RC56 modems only.
3. RC56 modems only.
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3.2.2.6 &C - RLSD (DCD) Option
The modem controls the RLSD output in accordance with the parameter supplied. The parameter value, if valid, is written to
S21 bit 5.
Syntax
&C<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 RLSD remains ON at all times.
1 RLSD follows the state of the carrier. (Default.)
Result Codes
OK 0 or 1.
ERROR Otherwise.
3.2.2.7 &D - DTR Option
This command interprets the ON to OFF transition of the DTR signal from the DTE in accordance with the parameter
supplied. The parameter value, if valid, is written to S21 bits 3 and 4. Also, see S25.
Syntax
&D<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 - DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q5, &Q6 DTR is ignored (assumed ON). Allows operation with
DTEs which do not provide DTR.
&Q1 DTR drop causes the modem to hang up. Auto-
answer is not affected.
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-
answer is inhibited.
1 DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q1, &Q5, &Q6 DTR drop is interpreted by the modem as if the
asynchronous escape sequence had been entered.
The modem returns to asynchronous command
state without disconnecting.
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-
answer is inhibited.
2 DTR drop is interpreted according to the current &Qn setting as follows:
&Q0 through &Q6 DTR drop causes the modem to hang up. Auto-
answer is inhibited. (Default.)
3 DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q1, &Q5, &Q6 DTR drop causes the modem to perform a soft reset
as if the Z command were received. The &Y setting
determines which profile is loaded.
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-
answer is inhibited.
If &Q5, &Q6, +FCLASS=1 or +FCLASS=2 is in effect, the action taken is the same as for &Q0.
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3.2.2.8 &K - Flow Control
This command defines the DTE/DCE (terminal/modem) flow control mechanism. The parameter value, if valid, is written to
S39 bits 0, 1, and 2.
Syntax
&K<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disables flow control.
3 Enables RTS/CTS flow control. (Default for data modem modes.)
4 Enables XON/XOFF flow control.
5 Enables transparent XON/XOFF flow control.
Note:
Upon reset, both RTS/CTS and XON/XOFF flow control is enabled for fax modem and voice modes.
Result Codes
OK <value> = 0, 3, 4, or 5.
ERROR Otherwise.
3.2.2.9 &M - Asynchronous/Synchronous Mode Selection
This command determines the DTR operating mode. The modem treats the &M command as a subset of the &Q command.
Syntax
&M<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Selects direct asynchronous operation. The command sequence &M0\N0 selects
normal buffered mode, but the command sequence \N0&M0 selects direct mode.
This is because the \N0 command is analogous to the &Q6 command. The value
000b is written to S27 bits 3, 1, and 0, respectively. (See &Q).
1 Selects synchronous connect mode with async off-line command mode. The value
001b is written to S27 bits 3, 1, and 0, respectively. (Serial interface operation
only.) (SmartACF and SmartACFL only.)
2 Selects synchronous connect mode with async off-line command mode. Same as
&M1 except that &M2 enables DTR dialing of directory slot 0. The modem will
disconnect if DTR is OFF for more than the period in S25 (in units of hundredths of
a second): the data connection will be synchronous. The value 010b is written to
S27 bits 3, 1, and 0, respectively. (Serial interface operation only.) (SmartACF and
SmartACFL only.)
3 Selects synchronous connect mode. This mode allows DTR to act as a talk/data
switch. The call is manually initiated while DTR is inactive. When DTR becomes
active, the handshake proceeds in originate or answer mode according to S14 bit
7. The value 011b is written to S27 bits 3, 1, and 0, respectively. (Serial interface
operation only.) (SmartACF and SmartACFL only.)
Result Codes
OK <value> = 0 to 3 (SmartACF and SmartACFL)
OK <value> = 0 (SmartSCM)
ERROR Otherwise.
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3.2.2.10 &Q - Sync/Async Mode
This command is an extension of the &M command and is used to control the connection modes permitted. It is used in
conjunction with S36 and S48. (Also, see \N.)
NOTE:
When the &Q0 to &Q3 command is issued to select the mode, the subsequent connect message will report the DCE
speed regardless of the W command and S95 settings.
Syntax
&Q<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Selects direct asynchronous operation. The value 000b is written to S27 bits 3, 1,
and 0, respectively. See &M0.
1 Selects synchronous connect mode with async off-line command mode. The value
001b is written to S27 bits 3, 1, and 0, respectively. See &M1. (Serial interface
operation only.) (SmartACF and SmartACFL only.)
2 Selects synchronous connect mode with async off-line command mode and
enables DTR dialing of directory 0. The value 010b is written to S27 bits 3, 1, and
0, respectively. See &M2. (Serial interface operation only.) (SmartACF and
SmartACFL only.)
3 Selects synchronous connect mode with async off-line command mode and
enables DTR to act as Talk/Data switch. The value 011b is written to S27 bits 3, 1,
and 0, respectively. See &M3. (Serial interface operation only.) (SmartACF and
SmartACFL only.)
5 The modem will try to negotiate an error-corrected link. The modem can be
configured using S36 to determine whether a failure will result in the modem
returning on-hook or will result in fallback to an asynchronous connection. The
value 101b is written to S27 bits 3, 1, and 0, respectively. (Default.)
6 Selects asynchronous operation in normal mode (speed buffering). The value 110b
is written to S27 bits 3, 1, and 0, respectively.
Result Codes
OK <value> = 0 to 3, 5, or 6 (SmartACF and SmartACFL only)
OK <value> = 0, 5, or 6 (SmartSCM only)
ERROR Otherwise.
3.2.2.11 &R - RTS/CTS Option
This selects how the modem controls CTS. CTS operation is modified if hardware flow control is selected (see &K command).
The parameter value, if valid, is written to S21 bit 2.
Syntax
&R<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 In sync mode, CTS tracks the state of RTS; the RTS-to-CTS delay is defined by
S26. In async mode, CTS is normally ON and will turn OFF only if required by flow
control.
1 In sync mode, CTS is always ON (RTS transitions are ignored). tracks the state of
RTS; In async mode, CTS is normally ON and will turn OFF only if required by flow
control.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
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3.2.2.12 &S - DSR Override
This command selects how the modem will control DSR. The parameter value, if valid, is written to S21 bit 6.
Syntax
&S<value>
Defined Values
<value> Decimal number corresponding to the selected option.
&0 DSR will remain ON at all times. (Default.)
&1 DSR will become active after answer tone has been detected and inactive after the
carrier has been lost.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
3.2.2.13 &X - Select Synchronous Clock Source
Selects the source of the transmit clock for the synchronous mode of operation. The parameter value, if valid, is written to
S27 bits 4 and 5.
In asynchronous mode, the transmit and receive clocks are turned OFF. In synchronous mode, the clocks are turned ON with
the frequency of 1200 Hz or faster corresponding to the speed that is selected for modem operation.
Syntax
&X<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Selects internal timing. The modem generates the transmit clock signal and
applies it to the TXCLK output at the serial interface.
1 Selects external timing. The local DTE sources the transmit clock signal on the
XTCLK input of the serial interface. The modem applies this clock to the TXCLK
output at the serial interface.
2 Selects slave receive timing. The modem derives the transmit clock signal from the
incoming carrier and applies it to the TXCLK output at the serial interface.
Result Codes
OK <value> = 0 to 2.
ERROR Otherwise.
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3.2.2.14 +IPR - Fixed DTE Rate
This numeric extended-format parameter specifies the data rate at which the modem will accept commands during online
operation. It may be used to select operation at rates at which the modem is not capable of automatically detecting the data
rate being used by the DTE. Specifying a value of 0 disables the function and allows operation only at rates automatically
detectable by the modem. The specified rate takes effect following the issuance of any result code(s) associated with the
current command line.
The <rate> specified does not apply in OnLine Data State if Normal Mode (Direct Mode) of operation is selected.
Syntax
+IPR=<rate>
Defined Values
<rate> Specifies the DTE-modem interface operation rate in bits/s. The available rates are:
0, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, or 230400
If unspecified or set to 0, automatic detection is selected and the character format is also forced to
autodetect, +ICF=0.
If the rate specified is not supported by the modem, an ERROR result code will be returned
Reporting Current or Selected Values
Command: +IPR?
Response: +IPR: <rate>
Example 1: +IPR: 0 for automatic rate detection.
Example 2: +IPR: 115200 For 115200 bps.
Reporting Supported Range of Parameter Values
Command: +IPR=?
Response: +IPR (<rate> range)
Example: +IPR: (0,300,1200,2400,4800,9600,19200,38400,57600,115200, 230400)
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3.2.2.15 +IFC - DTE-Modem Local Flow Control
This extended-format compound parameter controls the operation of local flow control between the DTE and the modem
during the data state when V.42 error control is used, or when fallback to non-error control mode is specified to include
buffering and flow control. It accepts two numeric subparameters.
Syntax
+IFC=[<modem_by_DTE>[,<DTE_by_modem>]]
Defined Values
<modem_by_DTE> Specifies the method to be used by the DTE to control the flow of received data from the modem.
0 None.
1 XON/XOFF on transmitted data (XON/XOFF on transmit data); do not pass
XON/XOFF characters to the remote modem.
2 Circuit 133 (Ready for Receiving). (Default.)
3 DC1/DC3 on circuit 103 (Transmitted Data) with DC1/DC3 characters being
passed through to the remote DCE in addition to being acted upon for local flow
control
<DTE_by_modem> Specifies the method to be used by the modem to control the flow of transmitted data from the
DTE.
0 None.
1 XON/XOFF on received data.
2 CTS/RTS. (Default.)
Reporting Current or Selected Values
Command: +IFC?
Response: +IFC: <modem_by_DTE>,<DTE_by_modem>
Example: +IFC: 2,2 for the defaults.
Reporting Supported Range of Parameter Values
Command: +IFC=?
Response: +IFC: (<modem_by_DTE> range),(<DTE_by_modem> range)
Example: +IFC: (0-3),(0-2)
3.2.2.16 +ILRR - DTE-Modem Local Rate Reporting
This extended-format numeric parameter controls whether or not the extended-format +ILRR:<rate> information text is
transmitted from the modem to the DTE.
Syntax
+ILRR=<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disables reporting of local port rate (+ILRR: is not transmitted). (Default.)
1 Enables reporting of local port rate (+ILRR: is transmitted).
Reporting Current or Selected Values
Command: +ILRR?
Response: +ILRR: <current value>
Example: +ILRR: 0 For the default setting
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Reporting Supported Range of Parameter Values
Command: +ILRR=?
Response: +ILRR: (<value> range)
Example: +ILRR: (0,1)
Reported Rate
The <rate> reported represents the current (negotiated or renegotiated) DTE-modem rate. If enabled, the intermediate result
code is transmitted after any modulation, error control or data compression reports are transmitted, and before any final result
code (e.g., CONNECT) is transmitted. The <rate> is applied after the final result code is transmitted.
The DTE-modem port rate will change only if neither buffered mode nor error controlled means are enabled (+ES=x,0) and if
the negotiated carrier rate (+MRR) does not match the current DTE-modem port rate (autodetected from the previous
command line).
Syntax
+ILRR: <rate>[,<rx_rate>]
Defined Values
<rate> Decimal value representing the current (negotiated or renegotiated) DTE-modem rate:
0, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, or 230400
<rx_rate> Optional decimal value reporting the RXD rate, if it is different from the TXD rate:
0, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, or 230400
Example
+ILRR: 19200
3.2.3 Call Control
3.2.3.1 D - Dial
This command directs the modem to go on-line, dial according to the string entered and attempt to establish a connection. If
no dial string is supplied, the modem will go on-line and attempt the handshake in originate mode.
NOTE:
If the ATD command is issued before the S1 register has cleared, the modem will respond with the NO CARRIER
result code.
If +FCLASS=0 is selected, the modem will behave as a data modem and will attempt to connect to another data modem. The
modem will have up to the period of time specified by register S6 or S7 to wait for carrier and complete the handshake. If this
time expires before the modem can complete the handshake, the modem will go on-hook with the NO CARRIER response.
This command will be aborted in progress upon receipt of any DTE character before completion of the handshake.
If +FCLASS=1, 1.0, or 2 is selected, the modem will behave as a facsimile modem and attempt to connect to a facsimile
machine (or modem) by entering the HDLC V.21 channel 2 receive state (as if +FRH=3 had been issued). This command will
be aborted upon receipt of any DTE character if the modem has not finished dialing. In this case, the modem will go on-hook
and return to command mode after displaying the NO CARRIER message. If the modem has finished dialing, it proceeds as if
the +FRH=3 command has been issued. (Refer to the +FRH command to determine how the modem behaves following this
stage.)
Dial Modifiers
The valid dial string parameters are described below. Punctuation characters may be used for clarity, with parentheses,
hyphen, and spaces being ignored.
Syntax
D<string>
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Defined Values
<string> Character string corresponding to the selected option(s).
0-9 DTMF digits 0 to 9.
* The 'star' digit (tone dialing only).
# The 'gate' digit (tone dialing only).
A-D DTMF digits A, B, C, and D. Some countries may prohibit sending of these digits
during dialing.
L Re-dial last number: the modem will re-dial the last valid telephone number. The L
must be immediately after the D with all the following characters ignored).
P Select pulse dialing: pulse dial the numbers that follow until a "T" is encountered.
Affects current and subsequent dialing. Some countries prevent changing dialing
modes after the first digit is dialed.
T Select tone dialing: tone dial the numbers that follow until a "P" is encountered.
Affects current and subsequent dialing. Some countries prevent changing dialing
modes after the first digit is dialed.
R This command will be accepted, but not acted on.
S=n Dial the number stored in the directory (n = 0 to 3). (See &Z.)
! Flash: the modem will go on-hook for a time defined by the value of S29. Country
requirements may limit the time imposed.
W Wait for dial tone: the modem will wait for dial tone before dialing the digits
following "W". If dial tone is not detected within the time specified by S7 (US) or S6
(W-class), the modem will abort the rest of the sequence, return on-hook, and
generate an error message.
@ Wait for silence: the modem will wait for at least 5 seconds of silence in the call
progress frequency band before continuing with the next dial string parameter. If
the modem does not detect these 5 seconds of silence before the expiration of the
call abort timer (S7), the modem will terminate the call attempt with a NO
ANSWER message. If busy detection is enabled, the modem may terminate the
call with the BUSY result code. If answer tone arrives during execution of this
parameter, the modem handshakes.
& Wait for credit card dialing tone before continuing with the dial string. If the tone is
not detected within the time specified by S7 (US models) or S6 (W-class models),
the modem will abort the rest of the sequence, return on-hook, and generate an
error message.
, Dial pause: the modem will pause for a time specified by S8 before dialing the
digits following ",".
; Return to command state. Added to the end of a dial string, this causes the
modem to return to the command state after it processes the portion of the dial
string preceding the ";". This allows the user to issue additional AT commands
while remaining off-hook. The additional AT commands may be placed in the
original command line following the ";" and/or may be entered on subsequent
command lines. The modem will enter call progress only after an additional dial
command is issued without the ";" terminator. Use "H" to abort the dial in progress,
and go back on-hook.
^ Toggles calling tone enable/disable: applicable to current dial attempt only.
( ) Ignored: may be used to format the dial string.
- Ignored: may be used to format the dial string.
<space> Ignored: may be used to format the dial string.
<i> Invalid character: will be ignored.
> If enabled by country specific parameter, the modem will generate a grounding
pulse on the EARTH relay output.
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3.2.3.2 T - Set Tone Dial Default
This command forces DTMF dialing until the next P dial modifier or P command is received. The modem will set an SParameter bit to indicate that all subsequent dialing should be conducted in tone mode. The DP command will override this
command. Clears S14 bit 5.
This command may not be permitted in some countries. (See P.)
Result Code
OK
3.2.3.3 P - Set Pulse Dial Default
This command forces pulse dialing until the next T dial modifier or T command is received. Sets S14 bit 5.
As soon as a dial command is executed which explicitly specifies the dialing mode for that particular call (e.g., ATDT...), this
command is overridden so that all future dialing will be tone dialed. (See T command.)
This command may not be permitted in some countries.
Result Code
OK
3.2.3.4 A - Answer
The modem will go off-hook and attempt to answer an incoming call if correct conditions are met. Upon successful completion
of answer handshake, the modem will go on-line in answer mode. This command may be affected by the state of Line Current
Sense, if enabled. (Most countries do not require Line Current Sense.) Operation is also dependent upon +FCLASS
command and country-specific requirements.
If +FCLASS=0 is selected, the modem will enter the connect state after exchanging carrier with the remote modem. If no
carrier is detected within a period specified in register S7, the modem hangs up. Any character entered during the connect
sequence will abort the connection attempt.
If +FCLASS=1, 1.0, or 2 is selected, the modem will go off-hook in V.21 answer mode. It will generate the V.21 2100 Hz
answer tone for 3 ± 0.5 seconds and, following a delay of 70 ms, will proceed as if the +FTH=3 command were issued. At any
stage up to (but excluding) the +FTH=3 command state, any character will abort the communication. (See the description of
the +FTH command for details.)
3.2.3.5 H - Disconnect (Hang-Up)
This command initiates a hang up sequence.
This command may not be available for some countries due to PTT restrictions.
Syntax
H<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 The modem will release the line if the modem is currently on-line, and will
terminate any test (AT&T) that is in progress. Country specific, modulation specific,
and error correction protocol specific (S38) processing is handled outside of the H0
command.
1 If on-hook, the modem will go off-hook and enter command mode. For US models,
the modem will remain off-hook. For W-class models, the modem will return onhook after a period of time determined by S7.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
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3.2.3.6 O - Return to On-Line Data Mode
This command determines how the modem will enter the on-line data mode. If in the on-line command mode, the modem
enters the on-line data mode with or without a retrain. If in the off-line command mode (no connection), the modem reports
ERROR.
Syntax
O<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Enters on-line data mode without a retrain. Handling is determined by the Call
Establishment task. Generally, if a connection exists, this command connects the
DTE back to the remote modem after an escape (+++).
1 Enters on-line data mode with a retrain before returning to on-line data mode.
2 Fast retrain without speed change (used for diagnostic purpose only).
3 Renegotiate rate without speed change (used for diagnostic purpose only.
4 Renegotiate rate down one speed (used for diagnostic purpose only).
5 Renegotiate rate up one speed (used for diagnostic purpose only).
Result Codes
OK <value> = 0 to 5 and a connection exists.
ERROR Otherwise or if not connected.
3.2.3.7 L - Speaker Volume
This command sets the speaker volume control. The parameter value, if valid, is written to S22 bits 0 and 1.
Syntax
L<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Low volume.
1 Low volume. (Default.)
2 Medium volume.
3 High volume.
Result Codes
OK <value> = 0 to 3.
ERROR Otherwise.
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3.2.3.8 M - Speaker Control
This command selects when the speaker will be on or off. The parameter value, if valid, is written to S22 bits 2 and 3.
Syntax
M<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Speaker is always off.
1 Speaker is on during call establishment, but off when receiving carrier. (Default.)
2 Speaker is always on.
3 Speaker is off when receiving carrier and during dialing, but on during answering.
Result Codes
OK <value> = 0 to 3.
ERROR Otherwise.
3.2.3.9 &G - Select Guard Tone
This command causes the modem to generate the guard tone selected by this command (DPSK modulation modes only).
The parameter value, if valid, is written to S23 bits 6 and 7.
Syntax
&G<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disables guard tone. (Default.)
1 Disables guard tone.
2 Selects 1800 Hz guard tone.
This command may not be permitted in some countries.
Result Codes
OK <value> = 0 to 2.
ERROR Otherwise.
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3.2.3.10 &P - Select Pulse Dial Make/Break Ratio
This command determines the make/break ratio used during pulse dialing. It is only effective if the appropriate bit to enable
this command is set through the ConfigurACE program. If enabled, it will override the make/break ratios in the OEM
parameters in ConfigurACE. The default is country-dependent. The parameter value, if valid, is written to S28 bits 3 and 4.
Syntax
&P<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Selects 39%-61% make/break ratio at 10 pulses per second. (Default.)
1 Selects 33%-67% make/break ratio at 10 pulses per second.
2 Selects 39%-61% make/break ratio at 20 pulses per second.
3 Selects 33%-67% make/break ratio at 20 pulses per second.
Result Codes
OK <value> = 0 to 3.
ERROR Otherwise.
3.2.3.11 &V - Display Current Configuration and Stored Profiles
This command reports the current (active) configuration, the stored (user) profiles, and the first four stored telephone
numbers. The stored profiles and telephone numbers are not displayed if the NVRAM is not installed or is not operational as
detected by the NVRAM test during reset processing.
Result Code
OK
Example:
AT&V
ACTIVE PROFILE:
B1 E1 L1 M1 N0 QO T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3 &Q5 &R1 &S0 &T5 &X0
S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:050 S08:002 S09:006
S10:014 S11:095 S12:050 S18:000 S25:005 S26:001 S36:007 S38:020 S46:138
S48:007 S95:000
STORED PROFILE 0:
B1 E1 L1 M1 N0 QO T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3 &Q5 &R1 &S0 &T5 &X0
S00:000 S02:043 S06:002 S07:050 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000
S36:007 S40:104 S41:195 S46:138 S95:000
STORED PROFILE 1:
B1 E1 L1 M1 N0 QO T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3 &Q5 &R1 &S0 &T5 &X0
S00:000 S02:043 S06:002 S07:050 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000
S36:007 S40:168 S41:195 S46:138 S95:000
TELEPHONE NUMBERS:
0 = 1 =
2 = 3 =
OK
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3.2.3.12 &V1 - Display Last Connection Statistics
Displays the last connection statistics in the following format (shown with typical results):
TERMINATION REASON.......... LOCAL REQUEST
LAST TX rate................ 26400 BPS
HIGHEST TX rate............. 26400 BPS
LAST RX rate................ 49333 BPS
HIGHEST RX rate............. 49333 BPS
PROTOCOL.................... LAPM
COMPRESSION................. V42Bis
Line QUALITY................ 038
Rx LEVEL.................... 015
Highest Rx State............ 67
Highest TX State............ 67
EQM Sum..................... 00B4
Min Distance................ 0000
RBS Pattern................. 00
Rate Drop................... 00
Digital Loss................ 2000
Local Rtrn Count............ 00
Remote Rtrn Count........... 00
Flex 9481814347C4
RBS Pattern:
positions 0 and 1.
Digital Loss:
Flex:
Shows V.8bis information as follows:
Shows which bits are being robbed in the least significant 6 bytes, e.g., 03 indicates 2 robbed bits in bit
Shows if a pad was encountered and if so, what was the digital loss. 2000 means 0dB.
First byte: Octet 13 (second byte of manufacturer id, 94 = K56flex)
Second byte: Octet 14 (Licensee code: 81 = Conexant)
Third byte: Octet 15 (manufacturer's product capabilities)
Fourth byte: Octet 16 (K56flex version number)
Fifth byte: Octet 17 (Conexant pump code version number)
Sixth byte: Octet 18 (x-law and controller version number)
Bit 6 Forced/Not forced A-Law/µ-Law
Bit 5 Select A-Law or µ-Law
Bit 4:0 Controller version
0 = Forced A-Law/µ-Law.
1 = Not forced A-Law/µ-Law.
0 = Select A-Law.
1 = Select µ-Law.
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3.2.3.13 \V - Single Line Connect Message Enable
This command enables or disables the single line connect message format as follows:
Syntax
\V<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Connect messages are controlled by the command settings X, W, and S95.
1 Connect messages are displayed in the single line format described below subject
to the command settings V (Verbose) and Q (Quiet). In Non-Verbose mode (V0),
single line connect messages are disabled and a single numeric result code is
generated for CONNECT DTE.
When single line connect messages are enabled, there are no CARRIER, PROTOCOL (+ER:), or COMPRESSION (+DR:)
messages apart from the fields described below.
The single line connect message format is:
CONNECT <DTE Speed>/<Modulation>/<Protocol>/<Compression>/<Line Speed>/<Voice and Data>
Where:
DTE Speed = DTE speed, e.g., 57600.
Modulation = “V90” for V.90 modulation.
“K56” for K56flex modulation.
“V34” for V.34 modulation.
“V32” for V.32 or V.32bis modulation.
Note: Modulation is omitted for all other modulations.
Protocol = “NONE” for no protocol.
“ALT” for Microcom Network Protocol.
“LAPM” for LAP-M protocol.
Compression = “ALT” for Microcom MNP5 compression.
“V42B” for V.42bis compression.
Note: Compression is omitted if protocol is NONE.
Line Speed = Asymmetric rates are displayed as /rate:TX/rate:RX, e.g., /1200 TX/75 RX.
Symmetric rates are displayed as a single DCE rate, e.g., 14400.
Voice and Data = Blank for Data mode only.
“SVD” for AudioSpan analog simultaneous audio/voice and data.
“DSVD” for digital simultaneous voice and data.
“V70” for G.729A digital simultaneous voice and data.
3.2.3.14 %L - Report Line Signal Level
Returns a value which indicates the received signal level. The value returned is a direct indication (DAA dependent) of the
receive level at the MDP,
Result Codes
OK
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at the telephone line connector. For example, 009 = -9 dBm, 043 = -43 dBm, and so on.
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3.2.3.15 %Q - Report Line Signal Quality
Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM value. Based on the EQM value,
retrain or fallback/fall forward may be initiated if enabled by %E1 or %E2.
Example:
AT%Q
015
Result Codes
OK If connected.
ERROR If not connected, or connected in 300 bps, V.23, or fax modes.
3.2.3.16 *B - Display Blacklisted Numbers
This command requests the modem to return a list of blacklisted numbers to the DTE. The format of the response is shown by
the example below. Permanently forbidden numbers as defined by country requirements will not appear on this list. If no
numbers are blacklisted, only the OK result code is issued.
Syntax
*B
Example
NO. - PHONE NUMBER -
------ ------------------------------
1; 4175537660
2; 8288924961
3; 3887278862
4; 3124839442
5; 6284664
OK
3.2.3.17 *D - Display Delayed Numbers
This command causes the modem to send a list of the delayed numbers together with the delay associated with each. The
modem will return a list of delayed telephone numbers as defined in the *B command. The format of the response is shown by
the example below (delay times are shown as hours:minutes:seconds). If no numbers are delayed, only the OK result code is
issued.
Syntax
*D
Example
NO. - PHONE NUMBER -DELAY
------ -------------------------------------------
1; 8264734660 2:00:00
2; 7532634661 2:00:00
3; 2587334662 0:02:00
4; 7532651663 0:03:25
5; 7459931664 0:01:45
OK
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3.2.3.18 –PPD= - Extension Pickup Notification through 16550 UART
The –PPD=1 command allows setting of the DDSR (bit 1 of register 6) when an extension pick-up is detected, and disables all
DSR notification. The –PPD=0 command disables this feature.
This feature is available only on a SmartSCM that is configured for parallel operation.
3.2.3.19 –STE= - Set Telephony Extension
The –STE command enables/disables Line-In-Use, Extension Pickup, and Remote Hangup detection features.
NOTE: This command is supported only if enabled through firmware configuration (see product release notes).
Syntax
-STE=<value>
Defined Values
<value> Decimal number corresponding to the selected bit-mapped options. The bit field are defined as
follows:
Bit 0 = Line-In-Use detection enable/disable.
Bit 1 = Extension Pickup detection enable/disable.
Bit 2 = Remote Hangup detection enable/disable.
<value> (Dec.) Remote Hangup Extension Pickup Line-In-Use
0 (default) Disabled Disabled Disabled
1 Disabled Disabled Enabled
2 Disabled Enabled Disabled
3 Disabled Enabled Enabled
4 Enabled Disabled Disabled
5 Enabled Disabled Enabled
6 Enabled Enabled Disabled
7 Enabled Enabled Enabled
Reporting Current or Selected Values
Command: -STE?
Response: -STE: <value>
Example: -STE: 4 Remote Hangup enabled, Extension Pickup disabled, and Line-In-Use disabled
Reporting Supported Range of Parameter Values
Command: -STE=? Show available options
Response: -STE: 0-7
Result Codes
OK <value> = 0-7
ERROR Otherwise.
Behavior in Data Mode (+FCLASS=0)
When on-hook, if the line is in use and an ATDT is issued, the modem will not go off-hook and will return with the message
LINE-IN-USE.
When off-hook and either an extension is picked up or a line reversal is detected, the modem will drop the connection. The
disconnect reason in register S86=25 (this is also defined for #UD). The user must flash the hook in order to get a dial tone
due because the remote server will be retraining.
If the local handset is picked up while the modem is off-hook, the modem will do a link-disconnect, flash the hook for 1.5
seconds, then connect the local handset to the line. At this point, the user dial tone should be on the local handset. The
disconnect reason in S86=25.
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Behavior in Voice Mode (+FCLASS=8)
When in voice mode and an extension is picked-up, a <DLE>P is sent to the DTE. When the modem is off-hook , a line
reversal may also be detected in which case a <DLE>l is sent to the DTE.
In voice mode, there is no blocking of ATDT when the line is in use. Also, there is no automatic hang-up in voice mode as in
data mode. There is only the above stated <DLE> shielding event reporting.
Operation in Data Mode
Line-In-Use (Enabled by AT-STE=1, AT-STE=3, AT-STE=5, or AT-STE=7)
Case 1: Telephone Line is in Use
If an ATDT, ATDP or ATDL is issued while Line-In-Use detection is enabled and the telephone line is in use, the modem will
immediately return the message LINE-IN-USE to the DTE without going off-hook, and then return to command mode.
Case 2: Telephone Line is in Use But Disconnected
If an ATDT, ATDP or ATDL is issued while Line-In-Use detection is enabled and the telephone line is NOT in use, the modem
will go off-hook after a short pause, then respond with CONNECT or NO CARRIER message.
Case 3: Telephone Line is Not Connected to Modem
If an ATDT, ATDP or ATDL is issued while Line-In-Use detection is enabled and the telephone line is not connected, the
modem will go off-hook momentarily, go back on-hook, then respond with NO DIAL TONE message.
Extension Pick-up (Enabled by AT-STE=2, AT-STE=3, AT-STE=6, or AT-STE=7):
Case 1: Modem off-hook, Local Handset Goes Off-Hook
If the local handset goes off-hook while the modem is in a data connection, the local handset will be muted. The modem will
then send a GSTN Cleardown to the remote modem and then go on-hook. The modem will then send a NO CARRIER
message to the DTE. A result code of 25 will be left in S86 register. After 2 seconds, the local handset will be connected to
the telephone line so the user hears the dial tone.
Case 2: Modem off-hook, Extension Pick-up
If the modem is connected and another extension goes off-hook, the modem will send a GSTN Cleardown to the remote
modem and then immediately hang-up. Due to the noise possibly being added to the line when a telephone extension is
picked-up, a GSTN Cleardown may or may not successfully be received by the remote mode. If the GSTN Cleardown is not
received successfully by the remote modem, the remote modem may attempt a retrain until the retrain fails and the remote
modem drops the line. In any case, the modem will send a NO CARRIER message to the DTE immediately after sending the
GSTN Cleardown. A result code of 25 will be left in the S86 register.
Because the extension is off-hook, the modem cannot flash the hook for the central office to generate a dial tone. In this
case, the user must flash the extension handset to obtain a dial tone.
Remote Hang-up (enabled by AT-STE=4, AT-STE=5, AT-STE=6, or AT-STE=7):
Case 1: Modem off-hook, Remote Hang-up
If the modem is connected (off-hook) and the remote modem/server goes hangs up, the central office may issue a line
polarity reversal. If a line polarity reversal is detected, the modem will drop the call and respond with NO CARRIER. The
reason for hang-up can be determined by #UD or by S86=25. A line reversal can also be simulated by simply pulling out the
telephone line during a connection.
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Operation in Voice Mode
Line-In-Use (enabled by AT-STE=1, AT-STE=3, AT-STE=5, or AT-STE=7):
This feature does not apply in voice mode.
Extension Pickup (Enabled by AT-STE=2, AT-STE=3, AT-STE=6, or AT-STE=7)
If the modem is off-hook and an extension goes off-hook, the modem issues a <DLE>P to the DTE. The application software
should then hang up the line (VLS=0).
Remote Hang-up (Enabled by AT-STE=4, AT-STE=5, AT-STE=6, or AT-STE=7)
If the modem is off-hook and the remote user goes on-hook, the modem issues a <DLE>P to the DTE. The application
software should then hang up the line (VLS=0).
Examples
User is talking on an extension and the modem tries to dial
AT-STE=7
ATDT555-1212
LINE-IN-USE
The line is not in use and the modem tries to dial
AT-STE=7
ATDT555-1212
Modem goes off-hook
CONNECT
An extension is off-hook but there is silence on the line and the modem tries to dial
AT-STE=3
ATDT555-1212
Modem goes off-hook
NO DIAL TONE
Modem is connected in data mode and an extension goes off-hook
AT-STE=2
ATDT555-1212
CONNECT
NO CARRIER Extension is picked up, GSTN Cleardown sent
ATS86=?
025
Modem is connected in data mode and remote modem goes on-hook
AT-STE=4
ATDT555-1212
CONNECT
NO CARRIER Remote modem drops line
ATS86=?
025
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Modem is connected in data mode and the LOCAL HANDSET goes off-hook
AT-STE=7
ATDT555-1212 5 sec delay
CONNECT
NO CARRIER Local handset goes off-hook, GSTN Cleardown sent, and remote modem goes
on-hook
ATS86=?
025
500ms after no carrier a dial tone is heard on the local handset
Modem is in answer machine mode and an extension goes off-hook
AT-STE=2
AT+FCLASS=8
OK
<DLE>h Local handset on-hook
<DLE>R Ring
AT+VLS=1
OK
AT+VSM=1,7200,0,0
AT+VTX Starts to play greeting message
<DLE>P User picks up extension
<DLE>! DTE send abort to end playback
AT+VLS=0 DTE hangs up
Automated system that needs to periodically use the line while giving the voice user the highest priority
A common use for these features would be an automated system that needs to periodically use the line while giving the voice
user the highest priority.
The automated system would make a connection when the line is free. It would do this without disturbing the line if the line is
in use. The automated system would periodically retry the connection until the line is free. Once the line is free it would dial
and make its connection. If a voice user wishes to use the line while the modem is connected. The modem will drop the line
and give the line to the user. The modem will then try to regain control of the line by once again periodically retrying to
establish a connection.
AT-STE=7
OK
ATDT5551212
CONNECT
Sometime later, the user picks up phone
NO CARRIER
ATS86?
25
OK
Delay 30 seconds
ATDT5551212
LINE-IN-USE
Try again some time later user hangs up the phone
CONNECT
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3.2.4 Modulation Control Commands
3.2.4.1 +MS - Modulation Selection
This extended-format compound parameter controls the manner of operation of the modulation capabilities in the modem. It
accepts six subparameters:
Syntax
+MS=[<carrier>[,<automode>[,<min_tx_rate>[,<max_tx_rate>[,<min_rx_rate>[,<max_rx_rate>]]]]]]
Where: Possible <carrier>, <min_tx_rate>, <max_tx_rate>, <min_rx_rate>, and <max_rx_rate values are
listed in are Table 3-2 (see definitions below).
Table 3-2. +MS Command Supported Rates
Modulation <carrier> Possible (<min_rx_rate>, <min_rx_rate>, (<min_tx_rate>), and <max_tx_rate>) Rates (bps)
Bell 103 B103 300
Bell 212 B212 1200 Rx/75 Tx or 75 Rx/1200 Tx
V.21 V21 300
V.22 V22 1200
V.22 bis V22B 2400 or 1200
V.23 V23C 1200
V.32 V32 9600 or 4800
V.32 bis V32B 14400, 12000, 9600, 7200, or 4800
V.34 V34 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, or 2400
V.90 V90 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 42667, 41333, 40000, 38667, 37333,
K56flex K56 56000, 54000, 52000, 50000, 48000, 46000, 44000, 42000, 40000, 38000, 36000, 34000, 32000
36000, 34667, 33333, 32000, 30667, 29333, 28000
Defined Values
<carrier> A string which specifies the preferred modem carrier to use in originating or answering a
connection. <carrier> values are strings of up to eight characters, consisting only of numeric digits
and upper case letters. <carrier> values for ITU standard modulations take the form: <letter><1-4
digits><other letters as needed>. Defined values are listed in Table 3-2.
<automode> A numeric value which enables or disables automatic modulation negotiation (e.g., ITU-T V.32
Annex A or V.8).
0 = Automode disabled.
1 = Automode enabled. (Default.)
<min_rx_rate> and
<max_rx_rate> Numeric values which specify the lowest (<min_rx_rate>) and highest (<max_rx_rate>) rate at
which the modem may establish a receive connection. May be used to condition distinct limits for
the receive direction as distinct from the transmit direction. Values for this subparameter are
decimal encoded, in units of bit/s. The possible values for each modulation are listed in Table 3-2.
Actual values will be limited to possible values corresponding to the entered <carrier> and fallback <carrier> as determined during operation. (Default = lowest (<min_rx_rate>) and highest
(<max_rx_rate>) rate supported by the selected carrier.)
<min_tx_rate> and
<max_tx_rate> Numeric values which specify the lowest (<min_tx_rate>) and highest (<max_tx_rate>) rate at
which the modem may establish a transmit connection. Non-zero values for this subparameter are
decimal encoded, in units of bit/s. The possible values for each modulation are listed in Table 3-2.
Actual values will be limited to possible values corresponding to the entered <carrier> and fallback <carrier> as determined during operation. (Default = lowest (<min_tx_rate>) and highest
(<max_tx_rate>) rate supported by the selected carrier.)
bis
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Reporting Current or Selected Values
Command: +MS?
Response: +MS: <carrier>,<automode>,<min_tx_rate>,<max_tx_rate>,<min_rx_rate>,<max_rx_rate>
Note:
The current active settings are reported under control of the +MR parameter.
Example: +MS: K56, 1,300,33600,300,56000 For default values. This example allows maximum system flexibility
to determine optimal receive and transmit rates during operation.
Reporting Supported Range of Parameter Values
Command: +MS=?
Response: +MS: (< carrier> range),(<automode> range),(<min_tx_rate> range),(<max_tx_rate> range),
(<min_rx_rate> range), (<max_rx_rate> range)
Example: +MS: (B103,B212,V21,V22,V22B,V23C,V32,V32B,V34,K56,V90),(0,1),(300-33600),(300-33600),
(300-56000),(300-56000)
Result Code
OK Valid subparameter string
ERROR Otherwise.
3.2.4.2 +MR - Modulation Reporting Control
This extended-format numeric parameter controls whether or not the extended-format +MCR:<carrier> and +MRR:<rate>
intermediate result codes are transmitted from the modem to the DTE. If enabled, +MCR:<carrier> and +MRR:<rate>
intermediate result codes represent the current (negotiated or renegotiated) modulation <carrier> and <rate> that are
transmitted at the point during connect negotiation (handshaking) at which the modem has determined which modulation and
rate will be used, i.e., before any Error Control or Data Compression reports are transmitted, and before any final result code
(e.g., CONNECT) is transmitted.
S95 bit 2 is reset to 0 for +MR=0 and is set to a 1 for +MR=1 or +MR=2. The more recent setting of +MR or S95 bit 2, and the
W command setting, determines modulation result code reporting (see S95 Parameter and W Command).
Syntax
+MR=[<value>]
Defined Values
<value> A decimal number corresponding to the selected option:
0 Disables reporting of modulation connection (+MCR: and +MRR: are not
transmitted). (Default.)
1 Enables reporting of modulation connection (+MCR: and +MRR: are transmitted
with tx rate, rx rate).
2 Enables reporting of modulation connection (+MCR: and +MRR: are transmitted
with rx rate only).
Reporting Current or Selected Values
Command: +MR?
Response: +MR: <current value>
Example: +MR: 0 For default setting
Reporting Supported Range of Parameter Values
Command: +MR=?
Response: +MR: (<value>range)
Example: +MR: (0-2)
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+MCR: Report Syntax
Response: +MCR: <carrier>
<carrier> Alphanumeric code corresponding to the reported carrier. Defined values are:
B103 For Bell 103
B212 For Bell 212
V21 For V.21
V22 For V.22
V22B For V.22bis
V23C For V.23
V32 For V.32
V32B For V.32bis
V34 For V.34
V90 For V.90
K56 For K56flex
+MRR: Report Syntax
Response: +MRR: <tx_rate>,<rx_rate>
<tx_rate> Decimal transmit rate in bits/s.
<rx_rate> Decimal receive rate in bits/s.
Example: +MRR: 28800, 48000
3.2.4.3 %E - Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward
Controls whether or not the modem will automatically monitor the line quality and request a retrain (%E1) or fall back when
line quality is insufficient or fall forward when line quality is sufficient (%E2). The parameter value, if valid, is written to S41
bits 2 and 6.
If enabled, the modem attempts to retrain for a maximum of 30 seconds.
Syntax
%E<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disable line quality monitor and auto-retrain.
1 Enable line quality monitor and auto-retrain.
2 Enable line quality monitor and fallback/fall forward. (Default.)
Result Codes
OK <value> = 0, 1, or 2.
ERROR Otherwise.
Fallback/Fall Forward.
modem will initiate a rate renegotiation to a lower speed within the V.34/V.32 bis/V.32 (RC336) modulation speeds. The
modem will keep falling back within the current modulation if necessary until the speed reaches 2400 bps (V.34) or 4800 bps
(V.32). Below this rate, the modem will only do retrains if EQM thresholds are exceeded. If the EQM is sufficient for at least
one minute, the modem will initiate a rate renegotiation to a higher speed within the current modulation speeds. The rate
renegotiations will be done without a retrain if a V.32 bis connection is established.
Speeds attempted during fallback/fall forward are those shown to be available in the rate sequences exchanged during the
initial connection. Fallback/fall forward is available in error correction and normal modes, but not in direct mode or
synchronous mode with external clocks.
When %E2 is active, the modem monitors the line quality (EQM). When line quality is insufficient, the
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3.2.4.4 %U - Select µ-Law or A-Law Codec Type
This command selects µ-Law or A-Law codec type for V.90 and K56flex modulation. This command also stores the selected
setting directly to NVRAM. The default value is country specific.
Syntax
%U<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Selects µ-Law.
1 Selects A-Law.
Result Codes
OK <value> = 0 or 1
ERROR Otherwise.
3.2.4.5 B - CCITT or Bell
When the modem is configured to allow either option, the modem will select Bell or CCITT modulation for a line speed
connection of 300 or 1200 bps. Any other line speed will use a CCITT modulation standard. The parameter value, if valid, is
written to S27 bit 6.
Syntax
B<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Selects CCITT operation at 300 or 1200 bps during Call Establishment and a
subsequent connection. (Default.)
1 Selects BELL operation at 300 or 1200 bps during Call Establishment and a
subsequent connection.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
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3.2.5 Error Control Commands
3.2.5.1 +ES - Error Control and Synchronous Mode Selection
This extended-format command specifies the initial requested mode of operation when the modem is operating as the
originator, optionally specifies the acceptable fallback mode of operation when the modem is operating as the originator, and
optionally specifies the acceptable fallback mode of operation when the modem is operating as the answerer. It accepts three
numeric subparameters:
Syntax
+ES=[<orig_rqst>[,<orig_fbk>[,<ans_fbk>]]]
Defined Values
<orig_rqst> Decimal number which specifies the initial requested mode of operation when the modem is
operating as the originator. The options are:
0 Initiate call with Direct Mode.
1 Initiate call with Normal Mode (also referred to as Buffered Mode) only.
2 Initiate V.42 without Detection Phase. If V.8 is in use, disable V.42 Detection
Phase.
3 Initiate V.42 with Detection Phase. (Default.)
4 Initiate MNP.
6 Initiate V.80 Synchronous Access Mode when connection is completed, and Data
State is entered. (See +ESA and +ITF commands.)
7 Initiate Frame Tunneling Mode when connection is complete, and Data Mode is
entered.
<orig_fbk> Decimal number which specifies the acceptable fallback mode of operation when the modem is
operating as the originator.
0 LAPM, MNP, or Normal Mode error control optional. (Default.)
1 LAPM, MNP, or Direct Mode error control optional.
2 LAPM or MNP error control required; disconnect if error control is not established.
3 LAPM error control required; disconnect if error control is not established.
4 MNP error control required; disconnect if error control is not established.
<ans_fbk> Decimal number which specifies the acceptable fallback mode of operation when the modem is
operating as the answerer or specifies V.80 Synchronous Access Mode.
0 Direct Mode.
1 Error control disabled, use Normal Mode.
2 LAPM, MNP, or Normal Mode error control optional. (Default.)
3 LAPM, MNP, or Direct Mode error control optional.
4 LAPM or MNP error control required; disconnect if error control is not established.
5 LAPM error control required; disconnect if error control is not established.
6 MNP error control required; disconnect if error control is not established.
8 Initiate V.80 Synchronous Access Mode when connection is completed, and Data
State is entered (see +ESA and +ITF commands).
9 Initiate Frame Tunneling Mode when connection is complete, and Data Mode is
entered.
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Examples
+ES=6 Enable V.80 Synchronous Access Mode originator.
+ES=,,8 Enable V.80 Synchronous Access Mode answerer.
+ES=6,,8 Enable V.80 Synchronous Access Mode originator and answerer.
+ES=3 Enable V.42 with Detection Phase originator. Disable V.80 Synchronous Access Mode originator.
+ES=,,2 Allow LAPM, MNP, or Normal Mode connection answerer. Disable V.80 Synchronous Access
Mode answerer.
+ES=3,,2 Enable V.42 with Detection Phase originator, allow LAPM, MNP, or Normal Mode connection
answer. Disable Synchronous Access Mode originator and answerer.
Reporting Current or Selected Values
Command: +ES?
Response: +ES: <orig_rqst>,<orig_fbk>,<ans_fbk>
Example: +ES: 3,0,2 For default settings.
+ES: 6,0,8 For V.80 Synchronous Access Mode originator and answerer.
Reporting Supported Range of Parameter Values
Command: +ES=?
Response: +ES: (<orig_rqst> range),( <orig_fbk> range), (<ans_fbk> range)
Example: +ES: (0-4,6,7),(0-4),(0-6,8,9)
3.2.5.2 +EB - Break Handling in Error Control Operation
This extended-format compound parameter controls the break handling in V.42 operation. It accepts three numeric
subparameters:
Syntax
+EB=[<break_selection>[,<timed>[,<default_length>]]]
Defined Values
<break_selection> Decimal number 0 specifying that break is to be ignored, i.e., not signaled to remote DCE.
<timed> Decimal number 0 specifying that any transmitted V.42 L-SIGNAL will not indicate break signal
length
<default_length> Decimal number 0 specifying that break is not delivered to the DTE.
Reporting Current or Selected Values
Command: +EB?
Response: +EB: <break_selection>,<timed>,<default_length><CR>
Example: +EB: 0,0,0 For default settings.
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Reporting Supported Range of Parameter Values
Command: +EB=?
Response: +EB: (<break_selection> range),(<timed> range), (default_length> range)
Example: +EB: (0),(0),(0)
3.2.5.3 +ESR - Selective Repeat
This extended-format numeric parameter controls the use of the selective repeat (SREJ) option in V.42.
Syntax
+ESR=[<value>] Decimal number 0 specifying that SREJ is not used.
Reporting Current or Selected Values:
Command: +ESR?
Response: +ESR: <value>
Example: +ESR: 0 For default setting
Reporting Supported Range of Parameter Values:
Command: +ESR=?
Response: +ESR: (<value>)
Example: +ESR: (0)
3.2.5.4 +EFCS - 32-bit Frame Check Sequence
This extended-format numeric parameter controls the use of the 16-bit or 32-bit frame check sequence (FCS) option in V.42.
Syntax
+EFCS=[<value>]
Defined Values
<value> Decimal number 0 specifying the use of the 16-bit FCS specified in V.42.
Reporting Current or Selected Values
Command: +EFCS?
Response: +EFCS: <value>
Example: +EFCS: 0 For default setting.
Reporting Supported Range of Parameter Values
Command: +EFCS=?
Response: +EFCS: (<value> range)
Example: +EFCS: (0)
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3.2.5.5 +ER - Error Control Reporting
This extended-format numeric parameter controls whether or not the extended-format +ER: intermediate result code is
transmitted from the modem to the DTE.
S95 bit 3 is reset to 0 for +ER=0 and is set to a 1 for +ER=1. The more recent setting of +ER or S95 bit 3, and the W
command setting, determines the actual error control result code reporting (see S95 Parameter and W Command).
+ER=[<value>]
Syntax
+ER=[<value>]
Defined Values
<value> A decimal number corresponding to the selected error control option:
0 = Error control reporting disabled (no +ER intermediate result code transmitted).
(Default.)
1 = Error control reporting enabled (+ER intermediate result code transmitted).
Reporting Current or Selected Values
Command: +ER?
Response: +ER: <current value>
Example: +ER: 0 for the default setting
Reporting Supported Range of Parameter Values
Command: +ER=?
Response: +ER: (<value> range)
Example: +ER: (0,1)
+ER: <type>
The +ER: <type> reported represents the current (negotiated or renegotiated) modem-modem error control type. If enabled,
the intermediate result code is transmitted at the point during error control negotiation (handshaking) at which the modem has
determined which error control protocol will be used (if any), before the final result code (e.g., CONNECT) is transmitted. The
format of this result code is:
The +ER intermediate result code, if enabled, is issued after the Modulation report (+MCR and +MRR) and before the Data
Compression Report (+DR).
Syntax
+ER: <type>
Defined Values
<type> An alphanumeric code corresponding to the selected protocol.
NONE Error control is not in use.
LAPM V.42 LAPM protocol is in use.
ALT MNP is in use.
Example
+ER: LAPM
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3.2.5.6 +ETBM - Call Termination Buffer Management
This extended-format compound parameter controls the handling of data remaining in modem buffers upon call termination. It
accepts three numeric subparameters:
Syntax
+ETBM=[<pending_TD>[,<pending_RD>[,<timer>]]]
Defined Values
<pending_TD> Decimal number 0 specifying that disconnect will occur immediately and all buffered transmit data
will be discarded when the local DTE requests call disconnection.
<pending_RD> Decimal number 0 specifying that disconnect will occur immediately and all buffered receive data
will be discarded when the local DTE requests call disconnection.
<timer> Decimal number 0 specifying that the modem will not attempt to deliver the buffered data before
abandoning the attempt and discarding remaining data.
Reporting Current or Selected Values
Command: +ETBM?
Response: +ETBM: <pending_TD>,<pending_RD>,<timer>
Example: +ETBM: 0,0,0
Reporting Supported Range of Parameter Values
Command: +ETBM=?
Response: +ETBM: (<pending_TD> range),(<pending_RD> range), (<timer> range)
Example: +ETBM: (0),(0),(0)
3.2.5.7 \B - Transmit Break to Remote
In non-error correction mode, the modem will transmit a break signal to the remote modem with a length in multiples of 100
ms according to parameter specified. If a number in excess of 9 is entered, 9 is used. The command works in conjunction
with the \K command.
In error correction mode, the modem will signal a break through the active error correction protocol, giving no indication of the
length.
Syntax
\B<value>
Defined Values
<value> Decimal number corresponding to the selected option.
1-9 Break length in 100 ms units. (Default = 3.) (Non-error corrected mode only.)
Result Codes
OK If connected in data modem mode.
NO CARRIER If not connected or connected in fax modem mode.
Note:
When the modem receives a break from the remote modem, break is passed to the DTE as follows: In non-error
correction mode direct, the break length is passed; in non-error correction mode normal and in error correction mode, a 300
ms break is passed.
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3.2.5.8 \K - Break Control
Controls the response of the modem to a break received from the DTE or the remote modem or the \B command. The
parameter value, if valid, is written to S40 bits 3, 4, and 5.
Syntax
\K<value>
Defined Values
<value> Decimal number corresponding to the selected option.
The response is different in three separate states.
first state
The
in data transfer mode:
0 Enter on-line command mode, no break sent to the remote modem.
1 Clear data buffers and send break to remote modem.
2 Same as 0.
3 Send break to remote modem immediately.
4 Same as 0.
5 Send break to remote modem in sequence with transmitted data. (Default.)
second case
The
during a data connection, and the \B is received in order to send a break to the remote modem:
0 Clear data buffers and send break to remote modem.
1 Clear data buffers and send break to remote modem. (Same as 0.)
2 Send break to remote modem immediately.
3 Send break to remote modem immediately. (Same as 2.)
4 Send break to remote modem in sequence with data.
5 Send break to remote modem in sequence with data. (Same as 4.) (Default.)
third case
The
connection:
0 Clears data buffers and sends break to the DTE.
1 Clears data buffers and sends break to the DTE. (Same as 0.)
2 Send a break immediately to DTE.
3 Send a break immediately to DTE. (Same as 2.)
4 Send a break in sequence with received data to DTE.
5 Send a break in sequence with received data to DTE. (Same as 4.) (Default.)
is where the modem receives a break from the DTE when the modem is operating
is where the modem is in the on-line command state (waiting for AT commands)
is where a break is received from a remote modem during a non-error corrected
Result Codes
OK 0 to 5.
ERROR Otherwise.
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3.2.5.9 -K - MNP Extended Services
Enables or disables conversion of a V.42 LAPM connection to an MNP 10 connection. The parameter value, if valid, is written
to S40 bits 0 and 1.
Syntax
-K<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disables V.42 LAPM to MNP 10 conversion. (Default.)
1 Enables V.42 LAPM to MNP 10 conversion.
2 Enables V.42 LAPM to MNP 10 conversion; inhibits MNP Extended Services
initiation during V.42 LAPM answer mode detection phase.
Result Codes
OK 0 or 2.
ERROR Otherwise.
3.2.6 Data Compression Commands
This section contains parameters to condition modem use of standard ITU-T V.42
3.2.6.1 +DS - Data Compression
This extended-format compound parameter controls the V.42bis data compression function if provided in the modem. It
accepts four numeric subparameters:
Data Compression Procedures.
bis
Syntax
+DS=[<direction>[,<compr_neg>[,<max_dict>[,<max_string>]]]]
Defined Values
<direction> Specifies the desired direction(s) of operation of the data compression function; from the DTE
point of view.
0 Negotiated; no compression (V.42bis P0=0).
3 both directions, accept any direction (V.42bis P0=11). (Default.)
<compr_neg> Specifies whether or not the modem should continue to operate if the desired result is not
obtained.
0 Do not disconnect if V.42bis is not negotiated by the remote modem as specified in
<direction>.
<max_dict> Specifies the maximum number of dictionary entries (2048 entries) which should be negotiated
(may be used by the DTE to limit the codeword size transmitted, based on its knowledge of the
nature of the data to be transmitted).
<max_string> Specifies the maximum string length (32 bytes) to be negotiated (V.42bis P2).
Reporting Current or Selected Values
Command: +DS?
Response: +DS: <direction>,<compr_neg>,<max_dict>,<max_string>
Example: +DS: 3,0,2048,32 for the defaults and 2048 entry max dictionary.
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Reporting Supported Range of Parameter Values
Command: +DS=?
Response: +DS: (<direction> range),(< compr_neg > range),(<max_dict> range),(<max_string> range)
Example: +DS: (0,3),(0),(2048),(32)
3.2.6.2 +DR - Data Compression Reporting
This extended-format numeric parameter controls whether or not the extended-format +DR: intermediate result code is
transmitted from the modem to the DTE.
S95 bit 5 is reset to 0 for +DR=0 and is set to a 1 for +DR=1. The more recent setting of +DR or S95 bit 5, and the W
command setting, determines the actual data compression result code reporting (see S95 Parameter and W Command).
Syntax
+DR=[<value>]
Defined Values
<value> decimal number corresponding to the selected option:
0 Data compression reporting disabled (no +DR result code transmitted).
1 Data compression reporting enabled (+DR result code transmitted). (Default.)
Reporting Current or Selected Values
Command: +DR?
Response: +DR: <current value>
Example: +DR: 1 For the default setting.
Reporting Supported Range of Parameter Values
Command: +DR=?
Response: +DR: (<value> range)
Example: +DR: (0,1)
+DR: <type> Intermediate Result Code
The +DR: <type> reported represents the current (negotiated or renegotiated) modem-modem data compression type. If
enabled, the intermediate result code is transmitted at the point after error control negotiation (handshaking) at which the
modem has determined which data compression technique will be used (if any) and the direction of operation. The +DR
intermediate result code, if enabled, is issued after the Error Control Report (+ER) and before the final result code (e.g.,
CONNECT).
The format of this result code is:
Result Code Syntax
+DR: <type>
Defined Values
<type> An alphanumeric code corresponding to the selected option:
NONE Data compression is not in use.
V42B V.42bis is in use in both directions.
ALT MNP 5 compression.
Example
+DR: V42B
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3.2.6.3 %C - Enable/Disable Data Compression
Enables or disables data compression negotiation. The modem can only perform data compression on an error corrected link.
The parameter value, if valid, is written to S41 bits 0 and 1.
Syntax
%C<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disables data compression. Resets S46 bit 1.
1 Enables MNP 5 data compression negotiation. Resets S46 bit 1.
2 Enables V.42 bis data compression. Sets S46 bit 1.
3 Enables both V.42 bis and MNP 5 data compression. Sets S46 bit 1. (Default.)
Result Codes
OK <value> = 0, 1, 2, or 3.
ERROR Otherwise.
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3.2.7 V.8/V.8bis Commands
3.2.7.1 +A8E - V.8 and V.8bis Operation Controls
This command is defined for two conditions: as a parameter while the modem is on-hook, and as an action command while
the modem is off-hook. If enabled, V.8 negotiation does not preclude simultaneous implementation of other negotiation
means (e.g., V.8bis, V.18, V.32bis Annex A).
This command is a compound parameter if issued while the modem is on-hook, used to precondition V.8 and V.8bis
originating and answering operation. It is issued by the DTE before the Dial (D) or Answer (A) command, regardless of the
state of the +FCLASS parameter.
This command is an action command if issued while the modem is off-hook, to (re)start V.8 or V.8bis negotiation. For
example, if initial V.8 negotiation failed, but subsequent T.30 negotiation indicated V.8 capability, this command may be used
to initiate V.8 negotiation.
Syntax
+A8E=<v8o>,<v8a>,<v8cf>[,<v8b>][,<cfrange>][,<protrange>]
Defined Values
<v8o> Decimal number which enables/disables issuance of +A8x indications during modem-controlled
V.8 origination negotiation.
1 Enable DCE-controlled V.8 origination negotiation without +A8x indications.
(Default.)
6 Enable DCE-controlled V.8 origination negotiation with +A8x indications.
<v8a>= Decimal number which enables/disables issuance of +A8x indications during modem-controlled
V.8 answer negotiation.
1 Enable DCE-controlled V.8 answer negotiation without +A8x indications. (Default.)
5 Enable DCE-controlled V.8 answer negotiation with +A8x indications.
<v8cf>= Set the V.8 CI signal call function to the hexadecimal octet XY.
0 (Default.)
21
C1
<v8b>= Decimal number which enables/disables V.8bis negotiation.
0 Disable V.8bis negotiation.
1 Enable V.8bis negotiation. (Default.)
<cfrange>= “<string of values>“. Applicable only for <v8a>=5. Not supported.
< protrange >= “<string of values>“. Applicable only for <v8a>=5. Not supported.
Default values: 1,1,00,1,0,0
The ATD and ATA commands behave as specified in V.250, and +A8n indications are not generated by the modem.
For subparameter values <v8o>=6 and <v8a>=5, the +A8I indications are issued during the course of the V.8 session to
notify the DTE when the relevant V.8 signals are received.
Reporting Current or Selected Values
Command: +A8E?
Response: +A8E: <v8o>,<v8a>,<v8cf>[,<v8b>][,<cfrange>][,<protrange>]
Example: +A8E: 1,1,00,1,0,0 For the defaults
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Reporting Supported Range of Parameter Values
Command: +A8E=?
Response: +A8E: (<v8o> range),(<v8a> range),(v8cf in octets),(<v8b> range),(<cfrange>),(<protrange>)
Example: +A8E: (1,6),(1,5),(0,21,C1),(0,1),(0),(0)
3.2.7.2 +A8I: - CI Signal Indication
This indication is issued by an answering modem, if +A8E,<v8a> ≠ 0, to indicate detection of a V.8 CI signal, and report the
recovered Call Function octet(s).
Indication Syntax
+A8I:<v8cf><CR>
Defined Values
<v8cf> A hexadecimal code octet representation of those Call Function octet(s). +A8I:0 indicates that the
modem timed out waiting for CI.
Example
+A8I:0 The modem timed out waiting for CI.
+A8I:X YYY
3.2.8 Synchronous Access Mode Commands
Three commands support Synchronous Access Mode:
+ES Enables and disables Synchronous Access Mode in the client or central site modem (see 3.2.5.1)
+ESA Configures the operation of the Synchronous Access Submode
+ITF Selects Transmit Flow Control Thresholds
Enabling Synchronous Access Mode enables the use of the 8-bit command characters defined in Table 9/V.80 of the Draft
ITU-T Recommendation V.80 (DATA COMMUNICATION OVER THE TELEPHONE NETWORK; In-Band DCE Control and
Synchronous Data Modes for Asynchronous DTE).
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3.2.8.1 +ESA - Configure Synchronous Access Submode
The operation of the Synchronous Access sub-Mode is configured by the +ESA parameter.
This extended-format compound parameter is used to control the manner of operation of the Synchronous Access Mode in
the modem. It accepts six numeric subparameters:
Syntax
+ESA=[<trans_idle>[,<framed_idle>[,<framed_un_ov>[,<hd_auto>[,<crc_type>[,<nrzi_en>[,<syn1>[,<syn2>]]]]]]]]
Defined Values
<trans_idle> Specifies the bit sequence transmitted by the modem when a transmit data buffer underrun
condition occurs, while operating in Transparent sub-Mode. The options are:
0 In Transparent sub-Mode, modem transmits 8-bit SYN sequence on idle. Modem receiver
does not hunt for synchronization sequence (default and fixed).
<framed_idle> Specifies the bit sequence transmitted by the modem when a transmit data buffer underrun
condition occurs immediately after a flag, while operating in Framed sub-Mode. The options are:
0 In Framed sub-Mode, modem transmits HDLC flags on idle (default and fixed).
<framed_un_ov> Specifies the actions undertaken by the modem when a transmit data buffer underrun or overrun
condition occurs immediately after a non-flag octet, while operating in Framed sub-Mode.
0 In Framed sub-Mode, modem transmits abort on underrun in middle of frame (default).
1 In Framed sub-Mode, DCE transmits a flag on underrun in middle of frame, and notifies
DTE of underrun or overrun.
<hd_auto> Specifies whether or not, in V.34 half-duplex operation, additional procedures besides those
specified in § 12/V.34 shall be performed by the modem when switching from primary channel to
secondary channel operation, and vice versa. This subparameter should not be commanded.
<crc_type> Specifies the CRC polynomial used while operating in Framed sub-Mode. The options are:
0 CRC generation and checking disabled (default).
1 In Framed sub-Mode, the 16-bit CRC is generated by the modem in the transmit direction,
and checked by the modem in the receive direction.
<nrzi_en> Specifies if Non Return to Zero Inverted (NRZI) encoding is to be used by the modem for transmit
and receive data. The options are:
0 NZRI encoding and decoding disabled (default and fixed).
<syn1>, <syn2> Specifies the octet value(s) to be used while performing character-oriented framing. <syn1> is to
be commanded to 255 (FFh); <syn2> is not to be commanded.
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Reporting Selected Options
The modem reports the selected options in response to the following command:
+ESA?
The response is:
+ESA: <trans_idle>,<framed_idle>,<framed_un_ov>,<hd_auto>,<crc_type>,<nrzi_en>,<syn1>,<syn2>
Example:
+ESA?
+ESA: 0,0,0, ,0,0,255, For the defaults.
Reporting Supported Options
The modem reports the supported options in response to the following command:
+ESA=?
The response is:
+ESA: (list of supported <trans_idle> values), (list of supported <framed_idle> values),
(list of supported <framed_un_ov> values), (list of supported <hd_auto> values),
(list of supported <crc_type> values), (list of supported <nrzi_en> values),
(list of supported <syn1> values), (list of supported <syn2> values)
Example:
+ESA=?
+ESA: (0),(0),(0-1), ,(0-1),(0),(255),
3.2.8.2 +H - Enable/Disable RPI and Host DSVD
This command enables or disables Conexant Protocol Interface (RPI) processing and sets the DTE speed.
Syntax
+H=<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disable protocol interface and video ready mode.
1 Enable RPI mode and set DTE speed to 19200 bps.
2 Enable RPI mode and set DTE speed to 38400 bps.
3 Enable RPI mode and set DTE speed to 57600 bps.
11 Enable RPI+ mode. When in RPI+ mode, a link is established between the modem
and the WinRPI or WinRPI95 host PC software driver to allow the modem to
support protocol (V.42bis/LAP-M/MNP2-5) connections with a remote modem. This
command should only be used when the WinRPI or WinRPI95 driver software is
installed in the PC.
16 Reserved.
17 Reserved.
Result Codes
OK 0 to 3, 11, 16, 17
ERROR Otherwise.
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3.2.8.3 +ITF - Transmit Flow Control Thresholds
The +ITF command determines the flow control thresholds used by the modem for transmit data from the DTE.
This optional compound parameter allows the DTE to determine the input buffer size in the modem for data on circuit 103
(transmit data) from the DTE, to control the thresholds used for flow control of such data, and to control how often the modem
reports to the DTE the number of octets in this buffer. The DTE can adjust its own thresholds for flow control of data on circuit
104 (received data) from the modem.
Syntax
+ITF=[<off>[,<on>[,<report_period>]]]
Defined Values
<off> Determines the threshold, in octets, above which the modem will generate a flow off signal.
Applicable in Synchronous Access and Frame Tunneling modes. Default <off> value is 255.
For the <on> and <off> subparameters, the input buffer is assumed to reside between the
modem’s V.24 interface and the Synchronous Access protocol layer; i.e., the buffer count includes
all octets, including EM codes, received from the DTE, with the exception of DC1 and DC3 if these
are used to signal <modem-by-DTE> flow control.
The modem returns the ERROR result code if the DTE specifies that the <off> subparameter be
set to a value less than or equal to the <on> subparameter; in this case, the current parameter
value settings are not modified.
<on> Determines the threshold, in octets, below which the modem will generate a flow on signal.
Applicable in Synchronous Access and Frame Tunneling modes. Default <on> value is 64.
<report_period> Not supported. A fixed value of zero is used and reported.
Reporting Selected Options
The modem sends a string of information text to the DTE consisting of selected options in response to the following
command:
+ITF?
The response is:
+ITF: <off>,<on>,<report_period>
Example:
+ITF?
+ITF: 255,64,0 Default values
Reporting Supported Options
The modem sends a string of information text to the DTE consisting of supported options in response to the following
command:
+ITF=?
The response is:
+ITF: (list of supported <off> values),(list of supported <on> values),(list of supported <report_period> values)
Example:
+ITF=?
+ITF: (0-255),( 0-255),(0)
The maximum reported <off> value is the input transmit data buffer level at which the modem signals a transmit data overrun
indication to the DTE.
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3.2.9 Diagnostic Commands
3.2.9.1 #UD – Last Call Status Report
#UD is an action command requesting reporting of logged operation events. It does not take parameters and must be the last
command in the command line.
The modem logs aspects of their operation for each call, and saves these results until cleared by one of the following events:
1. Power off.
2. Hard reset (e.g., negate DTR with &D3 set; reset button).
3. Soft reset = ATZ or AT&F.
4. ATD command issued.
5. ATA command issued.
6. Automatic answer (e.g., set register S0>0 and ring detected).
These results are NOT cleared by changing DTR, V.24 circuit 108.2, if &D0, &D1 or &D2.
Data Call State Model
For purposes of this command, there are four data call states, and associated status issues:
Call Setup
•
− Calling DCE: get dial tone, generate dial digits, detect call progress signals.
− Answering DCE: detect ringing, detect CallerID, etc.
Negotiation
•
− V.25 calling tone/answer tone exchanges
− V.8 or V.8bis call function negotiations
− V-series modem carrier detection and training
− Modem-to-modem protocols (e.g., V.42, V.42bis).
Data Transfer
•
− Bit-error rates, for each direction
− Rate renegotiation
− Retraining
Call Termination
•
− protocol disconnect signals
− carrier disconnect signals
− loss of carrier
− excessive error rates
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Command Syntax
In response to this command, the modem will report one or more lines of information text as defined below. Information text
format conforms to V.250; each line is preceded by a <CR><LF> pair, and terminated by <CR><LF>. (CR and LF characters
may be changed by writing new values to the contents of registers S3 and S4, respectively.)
The modem may generate a single line or multiple lines, followed by a standard OK final result code. For example, if call
setup failed, only that result is useful. Each information text line is formatted as follows, including one or more key=value
pairs:
Syntax
#UD
Response
DIAG <token key=value [[key=value] [key=value]] …>
Defined Values
DIAG 5 hexadecimal characters (44h, 49h, 41h, 47h, 20h)
< Left angle bracket (less than sign) (3Ch)
token Unique 32-bit hexadecimal string
space space character (20h)
Key One- or two-digit hexadecimal number (see Key in Table 3-3)
= Equal sign (3Dh)
Value Any string as defined below (Table 3-3 - Table 3-8 as appropriate)
> Right angle bracket (greater than sign) (3Eh)
Unless otherwise noted, all values are hexadecimal numbers. Any numeric values from tables in ITU V.58 are converted to
hexadecimal. Multi-digit values are reported MSD first. Leading 0’s may be deleted. See examples in Table 3-12.
2A4D3263(
32h, 4h1, 34h, 44h, 33h, 32h, 36h, 33h)
Monitoring an active connection
This command is intended for use after call termination. However, codes are defined so that a modem can respond before the
first call is placed, and during a call for live monitoring purposes. For example, key 60, call termination, has value 1 defined,
indicating that the call is still in progress.
There are at least two ways to do this. First, the DTE could switch the modem to On-Line command state, issue the
command, capture the responses and then issue an ATO command. For smoother on-line monitoring, in-band means defined
in ITU V.80 are recommended if available in the modem. If V.80 methods are used, each response line shall be a separate
extended in-band message.
Notes for Tables
1. The modem may insert a delay (e.g., 10 ms) between information text lines.
2. The code tables include values for data and fax calls. Some of the codes are applicable only to data calls (e.g., data
compression), some are applicable only to call origination (e.g., busy, answering signal detection) and some are
applicable only to the answering modem (e.g., calling signal detection).
callCleared codes from 3.6.4/V.58-1994
callCleared: indicates that the DCE has gone on-hook and that the previously existing network connection has been cleared.
These value are hex, converted from decimal in V.58. callCleared codes are described in Table 3-11.
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Table 3-3. AT#UD Last Call Status Report Format
Key Value(s) Definition
0 2 digits Diagnostic Command Specification revision number, digit.digit
1 Table 3-4 Call Setup Result code
2 Table 3-5 Multi-media mode
3 Table 3-6 DTE-DCE interface mode
4 String V.8 CM octet string, same format as V.250, in quotes
5 String V.8 JM octet string, same format as V.250, in quotes
10 0-2F Received signal power level, in –dBm (0-43)
11 0-1F Transmit signal power level, in –dBm (e.g., 0-17)
12 0-64 Estimated noise level, in –dBm (e.g., 10-90)
17 0-FFF Round Trip delay, in units of ms
18 Table 3-7 V.34 INFO bit map
20 Table 3-8 Transmit Carrier Negotiation Result
21 Table 3-8 Receive Carrier Negotiation Result
22 0-1F40 Transmit Carrier symbol rate (0-8000) in symbol/s
23 0-1F40 Receive Carrier symbol rate (0-8000) in symbol/s
24 0-FA0 Transmit Carrier frequency (0-4000) in Hz
25 0-FA0 Receive Carrier frequency (0-4000) in Hz
26 0-FA00 Initial transmit carrier data rate (0-64000) in bit/s
27 0-FA00 Initial receive carrier data rate (0-64000) in bit/s
30 0-FF Temporary carrier loss event count
31 0-FF Carrier Rate re-negotiation event count
32 0-FF Carrier Retrains requested
33 0-FF Carrier Retrain requests granted
34 0-FA00 Final transmit carrier data rate in bit/s
35 0-FA00 Final receive carrier data rate in bit/s
40 Table 3-9 Protocol Negotiation Result
41 0-400 Error Control frame size in bytes
42 0-FF Error control link timeouts in transmission
43 0-FF Error control link NAKs received
44 Table 3-10 Compression Negotiation Result
50 0-2 Transmit flow control: 0 = off; 1 = DC1/DC3; 2 = V.24 circuit 106/133
51 0-2 Receive flow control: 0 = off; 1 = DC1/DC3; 2 = V.24 circuit 106/133
52 0-FFFFFFFF Transmit characters sent from DTE
53 0-FFFFFFFF Received characters sent to DTE
54 0-FFFF Transmit characters lost (data overrun errors from DTE)
55 0-FFFF Received characters lost (data overrun errors to DTE)
56 0-FFFFFFFF Transmit I- Frame count, if error control protocol running
57 0-FFFFFFFF Received I-Frame count, if error control protocol running
58 0-FFFF Transmit I-Frame error count, if error control protocol running
59 0-FFFF Received I- Frame error count, if error control protocol running
60 Table 3-11 Termination Cause
61 0-FF Call Waiting event count
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Table 3-4. Call Setup Result Codes
Code Definition
0 No previous call (modem log has been cleared since any previous calls)
1 No dial tone detected
2 Reorder signal detected, network busy
3 Busy signal detected
4 No recognized signal detected (e.g., no signal, or nothing recognizable)
5 Voice detected * if this is a voice modem (e.g., V.253) operating in voice mode (e.g., +FCLASS=8.0)
7 Data Answering signal detected (e.g., V.25 ANS, V.8 ANSam)
8 Data Calling signal detected (e.g., V.25 CT, V.8 CI)
9 Fax Answering signal detected (e.g., T.30 CED, DIS)
A Fax Calling signal detected (e.g., T.30 CNG)
B V.8bis signal detected
Table 3-5. Multimedia Modes
Code Definition
0 Data Only
1Fax Only
2Voice
3 VoiceView™
4 ASVD, V.61
8DSVD, V.70
9 Video-telephony, H.324
A Other V.80 call
Table 3-6. DTE-DCE modes
Code Definition
0 Async data
1 V.80 transparent synchronous mode
2 V.80 framed synchronous mode
Table 3-7. V.34 INFO bit report
Bits Source bits Definition
31-30 INFO0 bit 20; 0
20-29 INFOc bits 79-88
16-19 INFOc bits 26-29 or 35-38 or 44-47 or 53-56-
or 62-65 or 71-74
12-15 INFOa bits 26-29
10-11 MP bit 50; 0
0-9 INFOa bits 40-49
Pre-emphasis field, selected by the symbol rate chosen
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Table 3-8. gstnModulationSchemeActive from 3.7.2/V.58
Value Description
0 V.17 (G3 Fax call)
1V.21
2V.22
3 V.22bis
4 V.23 Constant Carrier (1200/75)
8 V.27ter (G3 Fax call)
9 V.29 HD (G3 Fax call)
AV.32
B V.32bis
CV.34
EV.90
81
84 Bell 212A
85 Bell 103
Value Description
0 Disable/none
1 V.42 LAPM
2 V.42 Alternative protocol (MNP™)
80 MNP10™
K56flex
Table 3-9. errorControl Active from 3.5.2/V.58
Table 3-10. compressionActive from 3.2.2/V.58
Value Description
0 None
1 V.42bis
80 MNP5™
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Table 3-11. callCleared codes from 3.6.4/V.58-1994
Value Description Notes
0 CauseUnidentified Call setup issues
1 No Previous call Not in V.58
2 Call is still in progress Not in V.58
3 Call Waiting signal detected Not in V.58, only if modem can detect it
4 Delayed Same as value 2A, CallAttemptsLimitExceeded
19 InactivityTimerExpired
1F cct108isOffInhibitsDial DTR low
20 cct108turnedOff DTR drop
29 BlacklistedNumber
2A CallAttemptsLimitExceeded Same as “Delayed”, see ETS 300 001
2B ExtensionPhoneOff-hook If extension detection supported
2C CallSetupFailTimerExpired e.g., S7 timeout
2D IncomingCallDetected If incoming call while sending dial command.
2E LoopCurrentInterrupted
2F NoDial tone
31 ReorderTone Fast busy
33 EngagedTone Busy
34 LongSpaceDisconnect And if modem program to abort on long space
3C CarrierLost Signal Converter
3D TrainingFailed
3E NoModulationinCommon
3F RetrainFailed
40 RetrainAttemptCountExceeded
41 GstnCleardownReceived
42 FaxDetected If this was not a fax call attempt
46 InTestMode Test
50 AnyKeyAbort Call Control
51 DteHangupCommand If ATH was used to terminate the previous call.
52 DteResetCommand If ATZ was used to terminate the previous call.
5A FrameReject Error Control
5B NoErrorControlEstablished Error control was required
5C ProtocolViolation
5D n400exceeded LAPM retransmission Count Timer
5E NegotiationFailed
5F DisconnectFrameReceived
60 SabmeFrameReceived
64 LossOfSynchronization Data Compression
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Example Modem Response and Usage
Example #UD commend response are shown in Table 3-12.
Table 3-12. Completed Data Call, with some errors and rate retrain during the call
Modem Response line Description
DIAG <2A4D3263 0=09> This is version 0.9
DIAG <2A4D3263 1=06 2=0 3=0> Data Answer signal detected; Data only; Character async
DIAG <2A4D3263 5=”C14513902A” 6=”A145”> V.8 Call Menu indicates:
V.8 Joint Menu selects:
DIAG <2A4D3263 10=1F 11=0C 12=52> Receive level = -31 dBm; transmit level = -12 dBm; noise level = -82 dBm
DIAG <2A4D3263 14=03 15=05 16=10> Far end echo delay in milliseconds; Far end echo loss in dB; Near end echo loss
DIAG <2A4D3263 20=C 22=780 24=0C80 26=79E0> Transmitter: V.34 training completed; V.34 carrier frequency = 1920; V.34
DIAG <2A4D3263 21=D 25=1F40 27=DAC0> Receiver: V.90 training completed; V.90 symbol rate = 8000; initial receive rate
DIAG <2A4D3263 30=00 31=03 32=01 33=01> No carrier loss events, 3 carrier rate renegotiations attempted; 1 carrier retrain
DIAG <2A4D3263 34=7080 35=CB20> Final transmit rate is 28800 bit/s; final receive rate is 52000 bit/s
DIAG <2A4D3263 40=1 41=100> LAPM negotiation completed; frame size = 256
DIAG <2A4D3263 42=0 43=0> No error control timeout or link NAKs
DIAG <2A4D3263 44=1 45=400> V.42bis data compression used; dictionary size = 1024
DIAG <2A4D3263 50=2 51=2> Hardware transmit and receive flow control
DIAG <2A4D3263 52=343CC 54=0> 213964 DTE characters transmitted, w/o underrun
DIAG <2A4D3263 53=7230E6 55=47> 7483622 DTE characters received, 71 characters lost due to receive data
DIAG <2A4D3263 56=29D 58=0001> 597 (decimal) frames transmitted, with 1 frame error
DIAG <2A4D3263 58=2A4B 59=0004> 10827 (decimal) frames received, with 4 frame errors
DIAG <2A4D3263 60=51> Local PC initiated hangup
= 16 dB
symbol rate = 3200; initial transmit rate is 31200 bit/s
is 56000 bit/s
requested; 1 carrier retrain granted
overrun
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3.2.10 Compatibility Commands
3.2.10.1 &L - Leased Line Operation
This command requests leased line or dial-up operation. This command is provided for compatibility only; no mode change is
performed, dial-up operation continues. The OK response is returned for a valid parameter, but no other action is performed.
The parameter value, if valid, is written to S27 bit 2.
Syntax
&L<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Requests dial-up operation. Dial-up operation continues.
Result Codes
OK 0.
ERROR Otherwise.
3.2.10.2 )M - Enable Cellular Power Level Adjustment
This command is included for compatibility only and has no effect other than returning a result code.
Syntax
)M<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 )M0 command.
1 )M1 command.
2 )M2 command.
Result Codes
OK 0 to 2.
ERROR Otherwise.
3.2.10.3 @M - Initial Cellular Power Level Setting
This command is included for compatibility only and has no effect other than returning a result code.
Syntax
@M<value>
Defined Values
<value> Decimal number corresponding to the selected power setting.
0 @M0 command.
.
.
30 @M30 command.
Result Codes
OK 0 to 30.
ERROR Otherwise.
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3.2.10.4 :E - Compromise Equalizer Enable Command
This command is included for compatibility only and has no effect other than returning a result code.
Syntax
:E<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 :E0 command.
1 :E1 command.
Result Codes
OK 0 or 1.
ERROR Otherwise.
3.2.11 FastConnect Commands
3.2.11.1 $F – FastConnect Control
This command allows configuring of the client modem to connect to a central site modem that supports non-standard V.22
and V.22 bis FastConnect protocols.
Syntax
$F<n>
Defined Values
<n> Decimal number which specifies the initial requested mode of operation when the modem is
operating as the originator. The options are:
0 Normal connection (Default)
1 FastConnect without answer tone
2 Reserved
3 FastConnect with answer tone
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3.3 S-PARAMETERS
The S-Parameters are summarized in Table 3-13 along with their default values; registers denoted with an '*' may be stored in
one of the two user profiles by entering the &W command. One of these profiles may be loaded at any time by using the Z
command. Registers or register fields quoted as “reserved” are reserved for current or future use by the firmware, or are
permanently overridden by PTT limitations. For the latter, control of the equivalent functionality is available with ConfigurACE
Call Progress and Blacklisting options.
All bit-mapped registers are read-only. The appropriate AT command which controls the relevant bits in the S-Parameter
should be used to change the value.
3.3.1.1 S - Read/Write S-Parameter
The modem selects an S-Parameter, performs an S-Parameter read or write function, or reports the value of an S-Parameter.
n Establishes S-Parameter n as the last register accessed.
n=v Sets S-Parameter n to the value v.
n? Reports the value of S-Parameter n.
The parameter n can be omitted, in which case the last S-Parameter accessed will be assumed. The S can be omitted for
AT= and AT?, in which case the last S-Parameter accessed will be assumed.
For example:
ATS7 establishes S7 as the last accessed register.
AT=40 sets the contents of the last register accessed to 40.
ATS=20 sets the contents of the last register accessed to 20.
If the number "n" is outside the range of the S-Parameters available, the modem will return the ERROR message. If the value
“v” is outside the range permitted for a given S-Parameter, the modem will return the ERROR message. Input and output are
always in decimal format. Note that some S-Parameters are read-only.
In some cases, writing to the S-Parameter will appear to be accepted but the value will not actually be written.
Due to country restrictions, some commands will be accepted, but the value may be limited and replaced by a maximum or
minimum value.
Minimum, maximum, and default values for S-Parameters may be altered with ConfigurACE.
3.3.2 FACTORY DEFAULTS
The factory default values are stored in ROM and are loaded into the active configuration at power up or by the ATZ
command. In addition, the designated default profile is subsequently loaded, and may change some of the factory default
values. The designated default profile can be changed by entering the &Y command where n is one of the two possible user
profiles.
The defaults shown are those used by Conexant in factory profiles zero and one. These may be overwritten by the OEM with
ConfigurACE prior to placing the firmware in PROM. Minimum and maximum values may also be imposed by ConfigurACE in
response to country PTT requirements.
The default values shown in Table 3-13 may vary by modem firmware configuration. Consult the MCU firmware release notes
for exact configuration.
The factory default values may be loaded at any time by entering the &Fn command.
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Table 3-13. S-Parameter Summary
Register Function Range Units Saved Default**
S0 Rings to Auto-Answer 0-255 rings * 0
S1 Ring Counter 0-255 rings 0
S2 Escape Character 0-255 ASCII * 43
S3 Carriage Return Character 0-127 ASCII 13
S4 Line Feed Character 0-127 ASCII 10
S5 Backspace Character 0-255 ASCII 8
S6 Wait Time before Blind Dialing or for Dial Tone 2-255 s * 2
S7 Wait Time for Carrier, Silence, or Dial Tone 1-255 s * 50
S8 Pause Time for Dial Delay Modifier 2-255 s * 2
S9 Carrier Detect Response Time 1-255 0.1 s * 6
S10 Lost Carrier To Hang Up Delay 1-255 0.1 s * 14
S11 DTMF Tone Duration 50-255 0.001 s * 95
S12 Escape Prompt Delay (EPD) 0-255 0.02 s * 50
S14 General Bit Mapped Options Status - - 138 (8Ah)
S16 Test Mode Bit Mapped Options Status - - 0
S19 Reserved - - 0
S20 Reserved - - 0
S21 V.24/General Bit Mapped Options Status - - 52 (34h)
S22 Speaker/Results Bit Mapped Options Status - - 117 (75h)
S23 General Bit Mapped Options Status - 0
S24 Sleep Inactivity Timer 0-255 s 0
S25 Delay to DTR Off 0-255 s or 0.01 s 5
S26 RTS-to-CTS Delay 0-255 0.01 s 1
S27 General Bit Mapped Options Status - - 73 (49h)
S28 General Bit-Mapped Options Status - - 0
S29 Flash Dial Modifier Time 0-255 10 ms 70
S30 Disconnect Inactivity Timer 0-255 10 s 0
S31 General Bit-Mapped Options Status - - 192 (C0h)
S36 LAPM Failure Control - - * 7
S38 Delay Before Forced Hangup 0-255 s 20
S39 Flow Control Bit Mapped Options Status - - 3
S40 General Bit-Mapped Options Status - - * 104 (68h)
S41 General Bit-Mapped Options Status - - * 195 (C3h)
S46 Data Compression Control - - * 138
S48 V.42 Negotiation Control - - 7
S86 Call Failure Indication 0-26 - 21
S91 PSTN Transmit Attenuation Level 0-15 dBm 10 (Country dependent)
S92 Fax Transmit Attenuation Level 0-15 dBm 10 (Country dependent)
S95 Extended Result Codes Control - - * 0
S210 V.34 Symbol Rate 0-255 - 13 (0Dh)
* Register value may be stored in one of two user profiles with the &W command.
** Default values may be modified using ConfigurACE.
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3.3.3 S-PARAMETER DEFINITIONS
3.3.3.1 S0 - Number of Rings to Auto-Answer
S0 sets the number of the rings required before the modem automatically answers a call. Setting this parameter to zero
disables auto-answer mode.
Range: 0-255 rings
Default: 0
3.3.3.2 S1 - Ring Counter
S1 is incremented each time the modem detects a ring signal on the telephone line. S1 is cleared if no rings occur over an
eight second interval.
Range: 0-255 rings
Default: 0
3.3.3.3 S2 - Escape Character
S2 holds the decimal value of the ASCII character used as the escape character. The default value corresponds to an ASCII
'+'. A value over 127 disables the escape process, i.e., no escape character will be recognized.
Range: 0-255, ASCII decimal
Default: 43 (+)
3.3.3.4 S3 - Carriage Return Character
S3 sets the command line and result code terminator character. Pertains to asynchronous operation only.
Range: 0-127, ASCII decimal
Default: 13 (Carriage Return)
3.3.3.5 S4 - Line Feed Character
S4 sets the character recognized as a line feed. Pertains to asynchronous operation only. The Line Feed control character is
output after the Carriage Return control character if verbose result codes are used.
Range: 0-127, ASCII decimal
Default: 10 (Line Feed)
3.3.3.6 S5 - Backspace Character
S5 sets the character recognized as a backspace. Pertains to asynchronous operation only. The modem will not recognize
the Backspace character if it is set to a value that is greater than 32 ASCII. This character can be used to edit a command
line. When the echo command is enabled, the modem echoes back to the local DTE the Backspace character, an ASCII
space character and a second Backspace character; this means a total of three characters are transmitted each time the
modem processes the Backspace character.
Range: 0-32, ASCII decimal
Default: 8 (Backspace)
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3.3.3.7 S6 - Wait Time before Blind Dialing or for Dial Tone
S6 operation is country dependent.
1. Sets the length of time, in seconds, that the modem will wait before starting to dial after going off-hook when blind
dialing. This operation, however, may be affected by some ATX options according to country restrictions. The “Wait for
Dial Tone” call progress feature (W dial modifier in the dial string) will override the value in register S6. (US models.)
2. Sets the length of time, in seconds, that the modem will wait for dial tone when encountering a “W” dial modifier before
returning NO DIAL TONE result code. (W class.)
The modem always pauses for a minimum of 2 seconds, even if the value of S6 is less than 2 seconds.
Range: 2-255 seconds
Default: 2
3.3.3.8 S7 - Wait Time for Carrier, Silence, or Dial Tone
S7operation is country dependent.
1. Sets the length of time, in seconds, that the modem will wait for carrier before hanging up. The timer is started when the
modem finishes dialing (originate), or 2 seconds after going off-hook (answer). In originate mode, the timer is reset upon
detection of answer tone if allowed by country restrictions.
2. Sets the length of time, in seconds, that modem will wait for silence when encountering the @ dial modifier before
continuing with the next dial string parameter.
3. Sets the length of time, in seconds, that the modem will wait for dial tone when encountering a “W” dial modifier before
continuing with the next dial string parameter. (US models.)
Range: 1-255 seconds
Default: 50
3.3.3.9 S8 - Pause Time For Dial Delay
S8 sets the time, in seconds, that the modem must pause when the “,” dial modifier is encountered in the dial string.
Range: 2-255 seconds
Default: 2
3.3.3.10 S9 - Carrier Detect Response Time
S9 is supported for backwards compatibility only. No value can be written. Responds with default value.
Range: 6 tenths of a second
Default: 6 (0.6 second)
3.3.3.11 S10 - Lost Carrier To Hang Up Delay
S10 sets the length of time, in tenths of a second, that the modem waits before hanging up after a loss of carrier. This allows
for a temporary carrier loss without causing the local modem to disconnect. When register S10 is set to 255, the modem
functions as if a carrier is always present.
The actual interval the modem waits before disconnecting is the value in register S10 minus the value in register S9.
Therefore, the S10 value must be greater than the S9 value or else the modem disconnects before it recognizes the carrier.
Range: 1-255 tenths of a second
Default: 14 (1.4 seconds)
Note:
For Call Waiting detection, if the modem is set to US country code and S10 >=16, then the modem will detect the Call
Waiting tone and hang-up the line. If S10 <16, the modem will not detect Call Waiting tone.
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3.3.3.12 S11 - DTMF Tone Duration
S11 operation is country dependent.
1. For US models, S11 sets the duration of tones in DTMF dialing (has no effect on pulse dialing).
2. For W-class models, S11 is a country parameter loaded by ConfigurACE.
Range: 50-255 milliseconds
Default: 95 (95 milliseconds)
3.3.3.13 S12 - Escape Prompt Delay (EPD)
S12 defines the maximum period, in fiftieths of a second, allowed between receipt of the last character of the three escape
character sequence from the DTE and sending of the OK result code to the DTE. If any characters are detected during this
time, the OK will not be sent. Sending of the OK result code does not affect entry into command mode. (See 3.1.3.)
Range: 0-255 1/50 of a second
Default: 50 (1 second)
3.3.3.14 S14 - General Bit Mapped Options Status
S14 indicates the status of command options.
Default: 138 (8Ah) (10001010b)
Bit 0 This bit is ignored.
Bit 1 Command echo (En)
0 = Disabled (E0)
1 = Enabled (E1) (Default.)
Bit 2 Quiet mode (Qn)
0 = Send result codes (Q0) (Default.)
1 = Do not send result codes (Q1)
Bit 3 Result codes (Vn)
0 = Numeric (V0)
1 = Verbose (V1) (Default.)
Bit 4 Reserved
Bit 5 Tone (T)/Pulse (P)
0 = Tone (T) (Default.)
1 = Pulse (P)
Bit 6 Reserved
Bit 7 Originate/Answer
0 = Answer
1 = Originate (Default.)
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3.3.3.15 S16 - Test Mode Bit Mapped Options Status
S16 indicates the test in progress status.
Default: 0
Bit 0 Local analog loopback
0 = Disabled (Default.)
1 = Enabled (&T1)
Bits 1-7 Not used
3.3.3.16 S19 - Reserved
S19 is supported for backwards compatibility only. No value can be written. Responds with default value.
Range: None
Default: 0
3.3.3.17 S20 - Reserved
S20 is supported for backwards compatibility only. No value can be written. Responds with default value.
Range: None
Default: 0
3.3.3.18 S21 - V.24/General Bit Mapped Options Status
S21 indicates the status of command options.
Default: 52 (34h) (00110100b)
Bits 0 - 1 Reserved (0)
Bit 2 CTS behavior (&Rn)
0 = CTS tracks RTS (&R0)
1 = CTS always on (&R1) (Default.)
Bits 3-4 DTR behavior (&Dn)
0 = &D0 selected
1 = &D1 selected
2 = &D2 selected (Default.)
3 = &D3 selected
Bit 5 RLSD (DCD) behavior (&Cn)
0 = &C0 selected
1 = &C1 selected (Default.)
Bit 6 DSR behavior (&Sn)
0 = &S0 selected (Default.)
1 = &S1 selected
Bit 7 Long space disconnect (Yn)
0 = Y0 (Default.)
1 = Y1
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3.3.3.19 S22 - Speaker/Results Bit Mapped Options Status
S22 indicates the status of command options.
Default: 117 (75h) (01110101b)
Bits 0-1 Speaker volume (Ln)
0 = Off (L0)
1 = Low (L1) (Default.)
2 = Medium (L2)
3 = High (L3)
Bits 2-3 Speaker control (Mn)
0 = Disabled (M0)
1 = Off on carrier (M1) (Default.)
2 = Always on (M2)
3 = On during handshake (M3)
Bits 4-6 Limit result codes (Xn)
0 = X0
4 = X1
5 = X2
6 = X3
7 = X4 (Default.)
Bit 7 Reserved
3.3.3.20 S23 - General Bit Mapped Options Status
S23 indicates the status of command options.
Default: 0
Bits 0-6 Not used
Bits 6-7 Guard tone (&Gn)
0 = None (&G0) (Default.)
1 = None (&G1)
2 = 1800 Hz (&G2)
3.3.3.21 S24 - Sleep Inactivity Timer
S24 sets the length of time, in seconds, that the modem will operate in normal mode with no detected telephone line or DTE
line activity before entering low-power sleep mode. The timer is reset upon any DTE line or telephone line activity. If the S24
value is zero, neither DTE line nor telephone inactivity will cause the modem to enter the sleep mode.
Range: 0-255 seconds
Default: 0
3.3.3.22 S25 - Delay To DTR Off
S25 sets the length of time that the modem will ignore DTR for taking the action specified by &Dn. Its units are seconds for
synchronous modes and one hundredths of a second for other modes.
Range: 0-255 (1 second for synchronous modes 1; 0.01 second otherwise)
Default: 5
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3.3.3.23 S26 - RTS to CTS Delay
S26 sets the time delay, in hundredths of a second, before the modem turns CTS ON after detecting an OFF-to-ON transition
on RTS when &R0 is commanded. Pertains to synchronous operation only.
Range: 0-255 hundredths of a second
Default: 1
3.3.3.24 S27 - Bit Mapped Options Status
S27 indicates the status of command options.
Default: 73 (49h) (01001001b)
Bits 0,1,3 Synchronous/asynchronous selection (&Mn/&Qn)
31 0
0 0 0 = &M0 or &Q0
0 0 1 = &M1 or &Q1
0 1 0 = &M2 or &Q2
0 1 1 = &M3 or &Q3
10 0 = Reserved
1 0 1 = &Q5 (Default.)
11 0 = &Q6
Bit 2 Leased line control (&Ln)
0 = Dial up line (&L0) (Default.)
Bits 4 - 5 Internal clock select (&Xn)
0 = Internal clock (&X0) (Default.)
1 = External clock (&X1)
2 = Slave clock (&X2)
Bit 6 CCITT/Bell mode select (Bn)
0 = CCITT mode (B0)
1 = Bell mode (B1) (Default.)
Bit 7 - Reserved
3.3.3.25 S28 - Bit Mapped Options Status
S28 indicates bit mapped options status.
Default: 0
Bits 0 - 1 Reserved
Bit 2 Reserved (always 0).
Bits 3 - 4 Pulse dialing (&Pn)
0 = 39%-61% make/break ratio at 10 pulses per second (&P0) (Default.)
1 = 33%-67% make/break ratio at 10 pulses per second (&P1)
2 = 39%-61% make/break ratio at 20 pulses per second (&P2)
3 = 33%-67% make/break ratio at 20 pulses per second (&P3)
Bit 5-7 Reserved
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3.3.3.26 S29 - Flash Dial Modifier Time
S29 sets the length of time, in units of 10 ms, that the modem will go on-hook when it encounters the flash (!) dial modifier in
the dial string. S29 is a country dependent parameter. The S29 value cannot be changed using S29=XX.
Range: 0-255 10 ms intervals
Default: 70 (700 ms) for U.S.
3.3.3.27 S30 - Disconnect Inactivity Timer
S30 sets the length of time, in tens of seconds, that the modem will stay online before disconnecting when no data is sent or
received. In error-correction mode, any data transmitted or received will reset the timer. In other modes, any data transmitted
will reset the timer. The timer is inoperative in synchronous mode.
Range: 0-255 tens of seconds (0-2550 seconds)
Default: 0 (disabled)
3.3.3.28 S31 - Bit Mapped Options Status
S31 indicates bit mapped options status.
Default: 192 (C0h) (11000000b)
Bit 0 Single line connect message enable/disable (\Vn)
0 = Messages controlled by S95, Wn and Vn (\V0) (Default.)
1 = Single line connect message (\V1)
Bit 1 Reserved (0)
Bits 2-3 Error correction progress messages (Wn)
0 = DTE speed only (W0) (Default.)
1 = Full reporting (W1)
2 = DCE (line) speed only (W2)
Bits 4-5 Caller ID (+VCID)
0 = Caller ID disabled (+VCID=0) (Default.)
1 = Short (formatted) Caller ID enabled (+VCID=1)
2 = Long (unformatted) Caller ID enabled (+VCID=2)
Bits 6-7 Reserved (Default = 11b)
3.3.3.29 S36 - LAPM Failure Control
Default: 7 (00000111b)
Bits 0-2 This value indicates what should happen upon a LAPM failure. These fallback options are
initiated immediately upon connection if S48=128. If an invalid number is entered, the number is
accepted into the register, but S36 will act as if the default value has been entered.
0 = Modem disconnects.
1 = Modem stays on-line and a Direct mode connection is established.
2 = Reserved.
3 = Modem stays on-line and a Normal mode connection is established.
4 = An MNP connection is attempted and if it fails, the modem disconnects.
5 = An MNP connection is attempted and if it fails, a Direct mode connection is
6 = Reserved.
7 = An MNP connection is attempted and if it fails, a Normal mode connection is
Bits 3-7 Reserved
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3.3.3.30 S38 - Delay Before Forced Hang Up
S38 specifies the delay between the modem's receipt of the H command to disconnect (or ON-to-OFF transition of DTR if the
modem is programmed to follow the signal), and the disconnect operation. Applicable to error-correction connection only. This
parameter can be used to ensure that data in the modem buffer is sent before the modem disconnects.
1. If S38 is set to a value between 0 and 254, the modem will wait that number of seconds for the remote modem to
acknowledge all data in the modem buffer before disconnecting. If time expires before all data is sent, the NO CARRIER
result code will be issued to indicate that data has been lost. If all data is transmitted prior to time-out, the response to
the H0 command will be OK.
2. If S38 is set to 255, the modem does not time-out and continues to attempt to deliver data in the buffer until the
connection is lost or the data is delivered.
Range: 0-255 seconds
Default: 20
3.3.3.31 S39 - Flow Control Bit Mapped Options Status
Default: 3 (00000011b)
Bits 0-2 Status of command options
0 = No flow control
3 = RTS/CTS (&K3) (Default.)
4 = XON/XOFF (&K4)
5 = Transparent XON (&K5)
6 = Both methods (&K6)
Bits 3-7 Reserved
3.3.3.32 S40 - General Bit Mapped Options Status
S40 indicates the status of command options.
Default: 104 (68h) (01101000b)
Bits 0-1 MNP Extended Services (-Kn)
0 = Disable extended services (-K0) (Default.)
1 = Enable extended services (-K1)
2 = Enable extended services (-K2)
Bit 2 Reserved
Bits 3-5 Break Handling (\Kn)
0 = \K0
1 = \K1
2 = \K2
3 = \K3
4 = \K4
5 = \K5 (Default.)
Bits 6-7 Reserved
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3.3.3.33 S41 - General Bit Mapped Options Status
S41 indicates the status of command options.
Default: 13 (C3h) (00001101b)
Bits 0 -1 Compression selection (%Cn)
0 = Disabled (%C0)
1 = MNP 5 (%C1)
2 = V.42 bis (%C2)
3 = MNP 5 and V.42 bis (%C3) (Default.)
Bits 2, 6 Auto retrain and fallback/fall forward (%En)
Bit 6 Bit 2
0 0 = Retrain and fallback/fall forward disabled (%E0)
0 1 = Retrain enabled (%E1)
1 0 = Fallback/fall forward enabled (%E2) (Default.)
Bit 3 Reserved
Bits 4-5 Reserved
Bit 7 Reserved
3.3.3.34 S46 - Data Compression Control
S46 controls selection of compression. The following actions are executed for the given values:
Range: 136 or 138
Default: 138
S46=136 Execute error correction protocol with no compression.
S46=138 Execute error correction protocol with compression. (Default.)
3.3.3.35 S48 - V.42 Negotiation Control
The V.42 negotiation process determines the capabilities of the remote modem. However, when the capabilities of the
remote modem are known and negotiation is unnecessary, this process can be bypassed if so desired.
Range: 0, 7, or 128 If an invalid number is entered, it is accepted into the S-Parameter, but S48 will act as if 128
has been entered.
Default: 7
S48=0 Disable negotiation; bypass the detection and negotiation phases; and proceed with LAPM.
S48=7 Enable negotiation. (Default.)
S48=128 Disable negotiation; bypass the detection and negotiation phases; and proceed at once with the
fallback action specified in S36. Can be used to force MNP.
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3.3.3.36 S86 - Call Failure Reason Code
When the modem issues a NO CARRIER result code, a value is written to S86 Register to help determine the reason for the
failed connection. S86 records the first event that contributes to a NO CARRIER message. The code definitions are:
Range: 0-26
Default: 21
S86=0 Normal hangup, no error occurred.
S86=1 Reserved.
S86=2 Reserved.
S86=3 Call Waiting caused disconnect.
S86=4 Physical carrier loss.
S86=5 No error correction at the other end.
S86=6 No response to feature negotiation.
S86=7 This modem is async only; the other modem is sync only.
S86=8 No framing technique in common.
S86=9 No protocol in common.
S86=10 Bad response to feature negotiation.
S86=11 No sync information from the remote modem.
S86=12 Normal hangup initiated by the remote modem.
S86=13 Retransmission limit reached.
S86=14 Protocol violation occurred.
S86=15 Lost DTR.
S86=16 Received GSTN cleardown.
S86=17 Inactivity timeout.
S86=18 Speed not supported.
S86=19 Long space disconnect.
S86=20 Key abort disconnect.
S86=21 Clears previous disconnect reason.
S86=22 No connection established.
S86=23 Disconnect after three retrains.
S86=24 Call Waiting tone detected.
S86=25 Extension pickup detected.
S86=26 Remote hangup detected.
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3.3.3.37 S91 - PSTN Transmit Attenuation Level
In non-PCM modes (V.90 or K56flex are PCM modes), S91 sets the transmit attenuation level from 0 to 15 dBm for the PSTN
mode, resulting in a transmit level from 0 to -15 dBm. In some countries, the transmit level may not be changed and there are
checks to prevent transmit attenuation level change using ConfigurACE.
Range: 0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level.)
Default: 10 (-10 dBm transmit level.)
3.3.3.38 S92 - Fax Transmit Attenuation Level
S92 sets the transmit attenuation level from 0 to 15 dBm for the fax mode, resulting in a transmit level from 0 to -15 dBm. In
some countries, the transmit level may not be changed and there are checks to prevent transmit attenuation level change
using ConfigurACE.
Range: 0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level.)
Default: 10 (-10 dBm transmit level.)
3.3.3.39 S95 - Extended Result Codes Control
A bit set to a 1 in this parameter, in conjunction with the W command, will enable the corresponding extended result code
(see Section 3.5 and Table 3-15).
The +MR, +ER, and +DR settings also control S95 bits 2, 3, and 5, respectively. The more recent settings of +MR, +ER, and
+DR, or host writing of S95 bits 2, 3, and 5, along with the W command setting, determine the corresponding actual result
code reporting (see +MR, +ER, DR, and W commands).
Default: 0
Bit 0 CONNECT result code indicates DCE speed instead of DTE speed.
Bit 1 Append/ARQ to CONNECT XXXX result code in error-correction mode (XXXX = rate).
Bit 2 Enable +MCR: XXXX result code (XXXX = modulation) and +MRR: XXXX result code (XXXX =
rate). (Also, see +MR.)
Bit 3 Enable +ER: XXXX result code (XXXX = protocol identifier).
Bit 4 Reserved.
Bit 5 Enable +DR: XXXX result code (XXXX = compression type).
Bits 6-7 Reserved.
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3.3.3.40 S210 – V.34 Symbol Rates
The bits in this parameter control V.34 symbols rates and enables/disables V.34 asymmetric rates. This parameter is used for
diagnostic purpose only.
Default: 13 (0Dh) (00001101b)
Bits 0 -2 Selects the range of allowed V.34 symbol rates.
2 1 0 Symbol Rates (baud)
0 0 0 = 2400 only
0 0 1 = 2400 only (no 2734)
0 1 0 = 2400, 2800
0 1 1 = 2400, 2800, 3000
1 0 0 = 2400, 2800, 3000, 3200
1 0 1 = 2400, 2800, 3000, 3200, 3429 (Default.)
Bit 3 Enable/disable V.34 asymmetric rates.
0 = Disable asymmetric rates
1 = Enable asymmetric rates (Default.)
Bits 4-7 Reserved.
Examples
S210=13 Enable asymmetric rates with all symbol rates available (Default.).
S210=5 Disable asymmetric rates with all symbol rates available.
S210=8 Enable asymmetric rates with only 2400 baud available.
S210=11 Enable asymmetric rates with 2400 to 3000 baud available.
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3.4 CELLULAR COMMANDS
Cellular direct connect, supported by portable application modems, allows a direct interface to most cellular telephones
eliminating the need for other intelligent interfaces.
Landline modems operate with the telephone system by either going off-hook detecting dial tone and the dialing the
telephone number using pulses or DTMF digits, or detecting the RING signal and answering the call. Intelligent cellular phone
interfaces connect between the modems RJ-11 socket and the cellular phone's data interface. The interface provides landline
features to the modem (line current, dial tone, ringing, etc.), and translates the modem's signals (off-hook, DTMF digits, etc.)
into signals that the cellular phone understands. Once connected the interface acts as a transparent link between the modem
and the cellular telephone.
The Direct Connect Modem interfaces directly to the cellular phone's data interface and provides direct control over the
cellular phones operation. For example if the user were to instruct the modem to dial using the ATDTnnnn command the
modem would relay the telephone number and the SEND command to the cellular phone over the data interface.
The modem connects to the cellular phone using a special cable which must be purchased separately. A different cable is
required for each cellular phone or make of cellular phones.
3.4.1 Cellular Phone Drivers
The data interface to cellular phones differs between manufacturers and models and requires a unique cellular phone driver
for each phone or group of phones. Therefore the particular phone driver needs to be downloaded from the PC into the
modem's RAM before the modem can be used directly with the cellular phone. If a driver is not loaded the modem will operate
as a normal landline modem.
3.4.2 Cellular Commands
3.4.2.1 ^C2 - Download Cellular Phone Driver
The ^C2 command initiates the cellular phone driver download function. Upon receipt of the command, the modem issues the
"OK" message. The user then performs an ASCII download of the driver (in .S37 format) from the host to the modem, typically
using a communications software package (with transmit pacing turned off).
^C2 Download Cellular Phone command
Result Codes
OK
[Download Process]
OK Cellular phone driver download completed successfully
ERROR Cellular phone driver download not completed successfully, e.g., checksum of record (in S37 file)
is not correct, driver size is larger than 2k bytes, or an invalid driver is downloaded, or modem is
connected.
3.4.2.2 ^I - Identify Cellular Phone Driver
The modem reports the identification of the loaded cellular phone driver in response to the ^I command. The response is
dependent upon the driver.
Result Codes (Typical):
CELLULAR DRIVER: OKI 900/910
(c) Copyright 1999, Conexant Systems, Inc.
Version 1.00 Thu Jan 10:29:52 1998
OK
or
ERROR Cellular phone driver is not loaded
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3.4.2.3 ^T6 - Indicate Status of Cellular Phone
The status of the cellular phone connected to the modem is reported in response to the ^T6 command. The status is reported
in a single byte formatted as a decimal number. The individual status signals assigned to the status byte bits are:
bit 0 1 = Cellular phone is receiving an incoming call
bit 1 1 = Cellular phone is in use
bit 2 1 = Cellular phone is locked (cannot be used)
bit 3 1 = There is no service for cellular phone (does not indicate signal strength)
bit 4 1 = Cellular phone is powered on
bit 5 1 = Cellular driver is initialized
bit 6 0 = Reserved (0)
bit 7 1 = Cellular cable detected
Result Codes (typical):
128 (Cellular cable detected)
OK
Application of ^T6 Status Byte
The information obtained by issuing a AT^T6 can be used to determine if the loading of the cellular phone driver is necessary
by the host software. A download is not necessary if landline (or no cable) is connected to the modem, in which ^T6 will return
a value of 0 (bit 7=0). A download is necessary when a cellular cable is detected (implied cellular phone is also connected), in
which ^T6 will return a value of 128 (bit 7=1). Once a driver is downloaded to the modem, it will be able to operate in landline
or cellular mode based on detection of a cellular cable.
3.4.3 Operation
Once the driver is loaded and the modem is connected to the cellular phone, and the phone is powered on dial/answer
functions will be routed through the phone instead of the landline DAA, i.e., no special commands are needed to place or
answer calls, the same AT commands and software packages that are used for landline communication sessions can be
used. If the cellular phone is not connected or is powered off dial/answer functions will be routed through the landline DAA,
and if V.42 bis connection is established the cellular phone driver will be purged so that the V.42 bis dictionaries can be
increased to their normal size.
While the modem is being used with a cellular phone it will respond with normal result messages with the following
differences in meaning:
NO DIAL TONE Indicates that cellular service is not currently available.
RING Indicates that the cellular phone is receiving an incoming call.
3.4.3.1 Modem Configuration
Modem performance will be improved by modification of your standard configuration; it is recommended that the landline
modem also be EC compatible for reliable communications.
Cell Site AT&F
Base Site AT&F -SEC=1,18
MNP10-EC is automatically enabled on the cell side when a cellular phone driver is loaded and the modem firmware detects
that the cellular phone is attached, also in the V.34 mode the modem is automatically configured to force the connection in
V.32bis mode.
On the cell side the transmit level is defined in the cellular driver, therefore it is not necessary to set the level using the ATSEC command.
In the V.34 mode, on the landline side, if MNP10-EC is disabled (AT-SEC=0), it will automatically be enabled if another V.34
modem is calling (V.8 bis/V.8 signal indicates cellular capability). No particular modulation will be chosen on the land line
side. Therefore if a landside V.34 modem is NOT going to receive any calls from a V.32bis MNP10-EC modem it can be
configured using AT&F -SEC=0,18 , otherwise use the configuration above.
If MNP10-EC is enabled manually (using AT-SEC=1) no particular modulation will be chosen, therefore if the user wishes to
force V.32bis modulation they should use the AT+MS=10,1,minspeed,maxspeed command (e.g., AT+MS=10,1,4800,12000
would force V.32bis and limit the speed between 4800 and 12000 bps). To allow V.34 modulation use
AT+MS=11,1,minspeed,maxspeed (e.g., AT+MS=11,1,4800,19200 would allow V.34 speeds between 4800 and 19200).
When MNP10-EC is enabled in V.34 modes the symbol rate is limited to 3000, therefore the maximum speed would be 26.4K
however the initial connect speed is limited to 21600.
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If an AXCELL™ solution is used, a transmit level of -10dBm is required, therefore the following initialization string should be
used:
Cell Site AT &F -SEC=1,10
It is recommended that systems be set up if possible with separate modems to receive calls from other land based modems
and cellular modems. This is so that land based users that experience high network attenuation do not have connection
problems when communicating to modems configured for cellular operation.
The above configurations are the minimum additional AT commands may be issued to change the result messages etc.,
AT&F is used to ensure that the modem is in a know state.
Table 3-14 summarizes the mode and resulting transmit levels for both modems depending on their configuration.
3.4.3.2 Fax Configuration
It is recommended that fax transmissions be configured to operate at 9600 bps in V.17 mode or 7200 bps in V.29 mode.
3.4.3.3 Cellular Phone Configuration
To achieve the best operational performance, a cellular data connection should be attempted in a location where adequate
signal strength is observed for the cellular phone. This condition can be easily monitored on some phones with signal strength
indicator. In locations where even voice calls are unreliable, data connections should not be attempted. Under some
circumstances a special high gain antenna may improve performance.
Additional information regarding the use of the cellular phone and cellular network should be obtained from the service
provider and or cellular phone manufacturer.
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