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AT Commands for RCV56ACx, RCV336ACx, RCV288ACx, and RCV144ACx Modems
Reference Manual (Preliminary)
Order No. 1048
Rev. 4, February 20, 1997
AT Command Reference Manual
NOTICE
Information furnished by Roc kwell International Corporation is believed to be accurate and reliable. How ever, no responsibility is assumed by Roc kwell International for its us e, nor any infringement of patents or other rights of third parties which may result from its use. N o license is granted by implic ation or otherwise under any patent rights of Rock well International other than for circuitr y embodied in Rockwell produc ts. Rockw ell International reserves the r ight to change circuitry at any time without notice. This document is subject to change without notice.
K56flex is a trademark of Lucent Technologies and Rockwell International. ConfigurACE is a trademark of Rockwell International. MNP is a registered trademark of Microcom, Inc. Hayes is a registered trademark of Hayes Microcomputer Products, Inc.
AT Command Reference Manual
PREFACE
This manual supersedes the following manuals:
1. AT Command Reference Manual for the RC288ACi and RC288ACL Modem Families (Order No. 1048, Rev.3, January 9, 1996).
2. Addendum 1 to AT Commands for RC288ACx and RC144ACx Modem Families (Order No. 1048R3A1, Rev.1, August 2, 1996).
This revision incorporates Addendum 1 to AT Commands for RC288ACx and RC144ACx Modem Families (Order No. 1048R3A1, Rev.1, August 2, 1996); adds K56flex command (+MS), connect and carrier messages; and adds V.80 commands.
AT Command Reference Manual
This page is intentionally blank.
AT Command Reference Manual
Table of 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...............................................................................................1-2
1.1.4 ConfigurACE II for Windows Utility Program.............................................................................................1-2
1.2 REFERENCE DOCUMENTATION ........................................................................................................................1-2
2.1 DTE/DCE INTERCHANGE CIRCUITS...................................................................................................................2-1
2.2 COMMAND SYNTAX AND GUIDELINES..............................................................................................................2-1
2.2.1 DTE Commands......................................................................................................................................2-1
2.2.2 DTE Command Lines...............................................................................................................................2-1
2.3 AT COMMAND GUIDELINES ...............................................................................................................................2-1
2.3.1 Basic Command Syntax...........................................................................................................................2-1
2.3.2 Extended Command Syntax ....................................................................................................................2-1
3. AT COMMAND SET......................................................................................................................................................3-1
3.1 AT COMMAND GUIDELINES ...............................................................................................................................3-1
3.1.1 AT Commands, DTE Adaption................................................................................................................. 3-1
3.1.2 AT Command Format..............................................................................................................................3-1
3.1.3 Escape Code Sequence .......................................................................................................................... 3-1
3.2 AT COMMAND SET .............................................................................................................................................3-2
3.2.1 AT Commands ........................................................................................................................................3-2
A/ - Re-execute Command ...................................................................................................................3-2
AT= x - Write to Selected S-Register ....................................................................................................3-2
AT? - Read Selected S-Register...........................................................................................................3-2
A - Answer ...........................................................................................................................................3-2
Bn - CCITT or Bell................................................................................................................................3-2
Cn - Carrier Control..............................................................................................................................3-3
Dn - Dial...............................................................................................................................................3-3
En - Command Echo............................................................................................................................3-4
Fn - Select Line Modulation (RC144 Models Only)................................................................................3-5
Hn - Disconnect (Hang-Up)...................................................................................................................3-6
In - Identification...................................................................................................................................3-6
Ln - Speaker Volume............................................................................................................................3-6
Mn - Speaker Control ...........................................................................................................................3-7
Nn - Automode Enable .........................................................................................................................3-7
On - Return to On-Line Data Mode.......................................................................................................3-7
P - Set Pulse Dial Default .....................................................................................................................3-8
Qn - Quiet Results Codes Control............................................................................................... ..........3-8
Sn - Read/Write S-Register ..................................................................................................................3-8
T - Set Tone Dial Default ......................................................................................................................3-9
Vn - Result Code Form.........................................................................................................................3-9
Wn - Connect Message Control............................................................................................................3-9
Xn - Extended Result Codes...............................................................................................................3-10
Yn - Long Space Disconnect...............................................................................................................3-13
Zn - Soft Reset and Restore Profile ....................................................................................................3-13
3.2.2 AT& Commands....................................................................................................................................3-14
&Cn - RLSD (DCD) Option..................................................................................................................3-14
&Dn - DTR Option ..............................................................................................................................3-14
&Fn - Restore Factory Configuration (Profile)......................................................................................3-14
&Gn - Select Guard Tone...................................................................................................................3-15
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&Jn - Telephone Jack Control.............................................................................................................3-15
&Kn - Flow Control .............................................................................................................................3-15
&Ln - Leased Line Operation..............................................................................................................3-15
&Mn - Asynchronous/Synchronous Mode Selection ............................................................................3-16
&Pn - Select Pulse Dial Make/Break Ratio ..........................................................................................3-16
&Qn - Sync/Async Mode.....................................................................................................................3-17
&Rn - RTS/CTS Option.......................................................................................................................3-18
&Sn - DSR Override...........................................................................................................................3-18
&Tn - Test and Diagnostics.................................................................................................................3-18
&V - Display Current Configuration and Stored Profiles.......................................................................3-19
3.2.3 &V1 - Display Last Connection Statistics................................................................................................3-19
&Wn - Store Current Configuration .....................................................................................................3-20
&Xn - Select Synchronous Clock Source.............................................................................................3-20
&Yn - Designate a Default Reset Profile..............................................................................................3-20
&Zn=x - Store Telephone Number ......................................................................................................3-20
3.2.4 AT% Commands ...................................................................................................................................3-21
%En - Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward ........................3-21
%L - Line Signal Level........................................................................................................................3-21
%Q - Line Signal Quality.....................................................................................................................3-21
%7 - Plug and Play Serial Number......................................................................................................3-22
%8 - Plug and Play Vendor ID and Product Number............................................................................3-22
3.2.5 AT\ Commands .....................................................................................................................................3-23
\Kn - Break Control.............................................................................................................................3-23
\Nn - Operating Mode.........................................................................................................................3-24
\Vn - Single Line Connect Message Enable.........................................................................................3-24
3.2.6 AT+ Commands ....................................................................................................................................3-25
+MS - Select Modulation.....................................................................................................................3-25
+Hn - Enable/Disable RPI and DTE Speed..........................................................................................3-28
3.2.7 AT** Command .....................................................................................................................................3-29
** - Download to Flash Memory ..........................................................................................................3-29
3.2.8 AT- Commands.....................................................................................................................................3-30
-SDR=n - Enable/Disable Distinctive Ring ...........................................................................................3-30
3.3 ERROR DETECTION AND DATA COMPRESSION COMMANDS.......................................................................3-31
3.3.1 AT% Commands ...................................................................................................................................3-31
%C - Enable/Disable Data Compression.............................................................................................3-31
3.3.2 AT\ Commands .....................................................................................................................................3-31
\An - Select Maximum MNP Block Size............................................................................................... 3-31
\Bn - Transmit Break to Remote..........................................................................................................3-31
3.4 MNP 10 COMMANDS.........................................................................................................................................3-32
3.4.1 AT) Commands.....................................................................................................................................3-32
)Mn - Enable Cellular Power Level Adjustment.................................................................................... 3-32
*Hn - Link Negotiation Speed..............................................................................................................3-32
-Kn - MNP Extended Services ............................................................................................................3-32
-Qn - Enable Fallback to V.22 bis/V.22................................................................................................3-32
-SEC=n - Enable/Disable MNP10-EC..................................................................................................3-33
@Mn - Initial Cellular Power Level Setting...........................................................................................3-33
:E - Compromise Equalizer Enable Command.....................................................................................3-33
3.5 W-CLASS COMMANDS......................................................................................................................................3-34
3.5.1 AT* Commands.....................................................................................................................................3-34
*B - Display Blacklisted Numbers........................................................................................................3-34
*D - Display Delayed Numbers............................................................................................................3-34
*NCn - Country Select ........................................................................................................................3-35
3.6 CALLER ID COMMANDS ...................................................................................................................................3-36
3.6.1 AT#CID Command ............................................................................................................................... .3-36
#CIDn - Caller ID............................................................................................................................... .3-36
Inquiries .............................................................................................................................................3-36
Formatted Form Reporting..................................................................................................................3-36
AT Command Reference Manual
Example of Formatted Form Reporting...............................................................................................3-37
Unformatted Form Reporting..............................................................................................................3-37
Example of Unformatted Form Reporting............................................................................................3-37
3.7 CELLULAR COMMANDS....................................................................................................................................3-38
3.7.1 Cellular Phone Drivers...........................................................................................................................3-38
3.7.2 Cellular Commands ...............................................................................................................................3-38
^C2 - Download Cellular Phone Driver ................................................................................................3-38
^I - Identify Cellular Phone Driver........................................................................................................3-38
^T6 - Indicate Status of Cellular Phone ...............................................................................................3-39
3.7.3 Operation..............................................................................................................................................3-39
Modem Configuration .........................................................................................................................3-39
Fax Configuration...............................................................................................................................3-40
Cellular Phone Configuration ..............................................................................................................3-40
3.8 AT COMMAND RESULT CODES .......................................................................................................................3-42
OK (0) 3-42
CONNECT (1)....................................................................................................................................3-42
RING (2) ............................................................................................................................................3-42
NO CARRIER (3)................................................................................................................................3-42
ERROR (4).........................................................................................................................................3-42
CONNECT 1200 (5)............................................................................................................................3-42
NO DIALTONE (6)..............................................................................................................................3-42
BUSY (7)............................................................................................................................................3-43
NO ANSWER (8)................................................................................................................................3-43
CONNECT 0600 (9)............................................................................................................................3-43
CONNECT 2400 (10)..........................................................................................................................3-43
CONNECT 4800 (11)..........................................................................................................................3-43
CONNECT 9600 (12)..........................................................................................................................3-43
CONNECT 7200 (13)..........................................................................................................................3-43
CONNECT 12000 (14)........................................................................................................................3-43
CONNECT 14400 (15)........................................................................................................................3-43
CONNECT 19200 (16)........................................................................................................................3-43
CONNECT 38400 (17)........................................................................................................................3-44
CONNECT 57600 (18)........................................................................................................................3-44
CONNECT 115200 (19)......................................................................................................................3-44
CONNECT 75TX/1200RX (22)............................................................................................................3-44
CONNECT 1200TX/75RX (23)............................................................................................................3-44
DELAYED (24)...................................................................................................................................3-44
BLACKLISTED (32)............................................................................................................................ 3-44
FAX (33).............................................................................................................................................3-44
DATA (35)............................................................................................................................... ...........3-44
CARRIER 300 (40).............................................................................................................................3-44
CARRIER 1200/75 (44) ......................................................................................................................3-44
CARRIER 75/1200 (45) ......................................................................................................................3-44
CARRIER 1200 (46)...........................................................................................................................3-44
CARRIER 2400 (47)...........................................................................................................................3-44
CARRIER 4800 (48)...........................................................................................................................3-44
CARRIER 7200 (49)...........................................................................................................................3-45
CARRIER 9600 (50)...........................................................................................................................3-45
CARRIER 12000 (51).........................................................................................................................3-45
CARRIER 14400 (52).........................................................................................................................3-45
CARRIER 16800 (53).........................................................................................................................3-45
CARRIER 19200 (54).........................................................................................................................3-45
CARRIER 21600 (55).........................................................................................................................3-45
CARRIER 24000 (56).........................................................................................................................3-45
CARRIER 26400 (57).........................................................................................................................3-45
CARRIER 28800 (58).........................................................................................................................3-45
CONNECT 16800 (59)........................................................................................................................3-45
CONNECT 21600 (61)........................................................................................................................3-45
CONNECT 24000 (62)........................................................................................................................3-45
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CONNECT 26400 (63)........................................................................................................................ 3-45
CONNECT 28800 (64)........................................................................................................................3-46
COMPRESSION: CLASS 5 (66) .........................................................................................................3-46
COMPRESSION: V.42 bis (67)...........................................................................................................3-46
COMPRESSION: NONE (69) .............................................................................................................3-46
PROTOCOL: NONE (70)....................................................................................................................3-46
PROTOCOL: LAPM (77) ....................................................................................................................3-46
CARRIER 31200 (78).........................................................................................................................3-46
CARRIER 33600 (79).........................................................................................................................3-46
PROTOCOL: ALT (80)........................................................................................................................3-46
PROTOCOL: ALT-CELLULAR (81).....................................................................................................3-46
CONNECT 33600 (84)........................................................................................................................3-46
CONNECT 31200 (91)........................................................................................................................3-46
CARRIER 32000 (150) .......................................................................................................................3-46
CARRIER 34000 (151) .......................................................................................................................3-46
CARRIER 36000 (152) .......................................................................................................................3-47
CARRIER 38000 (153) .......................................................................................................................3-47
CARRIER 40000 (154) .......................................................................................................................3-47
CARRIER 42000 (155) .......................................................................................................................3-47
CARRIER 44000 (156) .......................................................................................................................3-47
CARRIER 46000 (157) .......................................................................................................................3-47
CARRIER 48000 (158) .......................................................................................................................3-47
CARRIER 50000 (159) .......................................................................................................................3-47
CARRIER 52000 (160) .......................................................................................................................3-47
CARRIER 54000 (161) .......................................................................................................................3-47
CARRIER 56000 (162) .......................................................................................................................3-47
CONNECT 32000 (165)......................................................................................................................3-47
CONNECT 34000 (166)......................................................................................................................3-47
CONNECT 36000 (167)......................................................................................................................3-47
CONNECT 38000 (168)......................................................................................................................3-48
CONNECT 40000 (169)......................................................................................................................3-48
CONNECT 42000 (170)......................................................................................................................3-48
CONNECT 44000 (171)......................................................................................................................3-48
CONNECT 46000 (172)......................................................................................................................3-48
CONNECT 48000 (173)......................................................................................................................3-48
CONNECT 50000 (174)......................................................................................................................3-48
CONNECT 52000 (175)......................................................................................................................3-48
CONNECT 54000 (176)......................................................................................................................3-48
CONNECT 56000 (177)......................................................................................................................3-48
CONNECT 230400 (20)......................................................................................................................3-48
+FCERROR (+F4)..............................................................................................................................3-48
3.9 AUDIOSPAN AND DSVD COMMANDS ..............................................................................................................3-49
3.9.1 Commands Supported by Both AudioSpan and DSVD ...........................................................................3-49
-SMS= x, y, z, t - Select AudioSpan/DSVD Mode................................................................................3-49
#VLS = x - Voice Line Select...............................................................................................................3-50
3.9.2 Commands Supported Only by DSVD....................................................................................................3-50
-SSE= x - Enable/Disable DSVD.........................................................................................................3-50
3.9.3 Commands Supported Only by AudioSpan ............................................................................................3-51
-SQS= x, y - Select AudioSpan Modulation.........................................................................................3-51
3.9.4 Examples ..............................................................................................................................................3-53
3.10 SYNCHRONOUS ACCESS MODE ...................................................................................................................3-58
3.10.1 Synchronous Access Mode Commands...............................................................................................3-58
+ES - Enable Synchronous Access Mode...........................................................................................3-58
+ESA - Configure Synchronous Access Submode...............................................................................3-59
+ ITF - Transmit Flow Control Thresholds ...........................................................................................3-61
4. S-REGISTERS..............................................................................................................................................................4-1
4.1 FACTORY DEFAULTS .........................................................................................................................................4-1
4.2 S-REGISTER DEFINITIONS.................................................................................................................................4-4
AT Command Reference Manual
S0 - Number of Rings to Auto-Answer ..................................................................................................4-4
S1 - Ring Counter.................................................................................................................................4-4
S2 - Escape Character .........................................................................................................................4-4
S3 - Carriage Return Character............................................................................................................4-4
S4 - Line Feed Character......................................................................................................................4-4
S5 - Backspace Character....................................................................................................................4-4
S6 - Wait Time for Dial Tone Before Blind Dialing, or After “W” Dial Modifier (W-Class Models).............4-5
S7 - Wait Time For Carrier After Dial, For Silence, or For Dial Tone After “W” Dial Modifier (US Models)4-5
S8 - Pause Time For Dial Delay............................................................................................................4-5
S9 - Carrier Detect Response Time ......................................................................................................4-5
S10 - Lost Carrier To Hang Up Delay....................................................................................................4-5
S11 - DTMF Tone Duration...................................................................................................................4-5
S12 - Escape Prompt Delay (EPD) ....................................................................................................... 4-6
S13 - Reserved ............................................................................................................................... .....4-6
S14 - General Bit Mapped Options Status.............................................................................................4-6
S15 - Reserved ............................................................................................................................... .....4-6
S16 - General Bit Mapped Test Options Status.....................................................................................4-7
S17 - Reserved ............................................................................................................................... .....4-7
S18 - Test Timer...................................................................................................................................4-7
S19 - AutoSync Bit Mapped Options.....................................................................................................4-8
S20 - AutoSync HDLC Address or BSC Sync Character........................................................................4-8
S21 - V.24/General Bit Mapped Options Status.....................................................................................4-9
S22 - Speaker/Results Bit Mapped Options Status..............................................................................4-10
S23 - General Bit Mapped Options Status...........................................................................................4-11
S24 - Sleep Inactivity Timer................................................................................................................4-11
S25 - Delay To DTR ...........................................................................................................................4-11
S26 - RTS to CTS Delay..................................................................................................................... 4-11
S27 - Bit Mapped Options Status........................................................................................................4-12
S28 - Bit Mapped Options Status........................................................................................................4-13
S29 - Flash Dial Modifier Time............................................................................................................4-13
S30 - Disconnect Inactivity Timer........................................................................................................4-13
S31 - Bit Mapped Options Status........................................................................................................4-14
S32 - XON Character .........................................................................................................................4-14
S33 - XOFF Character........................................................................................................................4-14
S34-S35 - Reserved...........................................................................................................................4-14
S36 - LAPM Failure Control................................................................................................................4-15
S37 - Desired Line Connection Speed.................................................................................................4-16
S38 - Delay Before Forced Hang Up...................................................................................................4-17
S39 - Flow Control Bit Mapped Options Status....................................................................................4-17
S40 - General Bit Mapped Options Status...........................................................................................4-18
S41 - General Bit Mapped Options Status...........................................................................................4-19
S46 - Data Compression Control ........................................................................................................4-19
S48 - V.42 Negotiation Action.............................................................................................................4-19
S82 - Break Handling Options.............................................................................................................4-20
S86 - Call Failure Reason Code..........................................................................................................4-20
S91 - PSTN Transmit Attenuation Level..............................................................................................4-20
S92 - Fax Transmit Attenuation Level.................................................................................................4-20
S95 - Extended Result Codes.............................................................................................................4-21
5. FAX CLASS 1 COMMANDS .........................................................................................................................................5-1
5.1 FAX I/O PROCESSING ........................................................................................................................................5-1
5.1.1 DTE-to-Modem Transmit Data Stream.....................................................................................................5-1
5.1.2 Modem-to-DTE Receive Data Stream......................................................................................... .............5-1
5.1.3 Fax Mode Selection................................................................................................................................ .5-1
5.1.4 Fax Origination........................................................................................................................................5-1
5.1.5 Fax Answering.........................................................................................................................................5-2
5.1.6 Fax Control Transmission........................................................................................................................5-2
5.1.7 Fax Control Reception.............................................................................................................................5-2
5.1.8 Fax Data Transmission............................................................................................................................5-3
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AT Command Reference Manual
5.1.9 Fax Data Reception................................................................................................................................ .5-3
5.2 COMMANDS........................................................................................................................................................5-4
+FCLASS=n - Select Service Class ......................................................................................................5-4
+F<command>? - Report Active Configuration......................................................................................5-4
+F<command>=? - Report Operating Capabilities.................................................................................5-4
+FAE=n - Data/Fax Auto Answer..........................................................................................................5-4
+FTS=n - Stop Transmission and Wait..................................................................................................5-4
+FRS=n - Receive Silence....................................................................................................................5-4
+FTM=n - Transmit Data ......................................................................................................................5-5
+FRM=n - Receive Data.......................................................................................................................5-5
+FTH=n - Transmit Data with HDLC Framing........................................................................................5-6
+FRH=n - Receive Data with HDLC Framing.........................................................................................5-6
5.3 EXAMPLES..........................................................................................................................................................5-6
6. FAX CLASS 2 COMMANDS .........................................................................................................................................6-1
6.1 COMMAND SYNTAX AND GUIDELINES..............................................................................................................6-1
6.1.1 DTE Commands......................................................................................................................................6-1
DTE Command Lines ...........................................................................................................................6-1
Facsimile Command Syntax .................................................................................................................6-1
6.1.2 Serial Port Speed and Flow Control ......................................................................................................... 6-3
Data Stream Termination......................................................................................................................6-3
DTE to DCE Streams............................................................................................................................6-3
DCE to DTE Streams............................................................................................................................6-3
6.1.3 Auto Answer............................................................................................................................................6-3
6.1.4 Identification of T.30 Options ...................................................................................................................6-3
6.1.5 Session Status Reporting.........................................................................................................................6-4
6.1.6 Procedure Interrupt Negotiation...............................................................................................................6-4
6.2 SERVICE CLASS 2 IDENTIFICATION AND SELECTION......................................................................................6-4
6.2.1 +FMFR?, Request Manufacturer Identification .........................................................................................6-4
6.2.2 +FMDL?, Identify Product Model..............................................................................................................6-4
6.2.3 +FREV?, Identify Product Revision..........................................................................................................6-4
6.3 SERVICE CLASS 2 ACTION COMMANDS........................................................................................................... 6-4
6.3.1 ATD, Originate a Call...............................................................................................................................6-5
6.3.2 ATA, Answer a Call..................................................................................................................................6-5
Manual Call Answer..............................................................................................................................6-5
Automatic Answer.................................................................................................................................6-5
Connection as a Data Modem...............................................................................................................6-5
6.3.3 +FDT, Data Transmission........................................................................................................................ 6-6
Initiate Page Transmission....................................................................................................................6-6
Continue a Page...................................................................................................................................6-6
Phase C Data Framing .........................................................................................................................6-6
Phase C Data Format...........................................................................................................................6-6
<CAN>, Escape from Transmission......................................................................................................6-6
6.3.4 +FET, Transmit Page Punctuation ...........................................................................................................6-8
End a Page ..........................................................................................................................................6-8
6.3.5 +FDR, Begin or Continue Phase C Receive Data.....................................................................................6-9
Initiate Document Reception.................................................................................................................6-9
Continue Document Reception ...........................................................................................................6-10
Phase C Data Framing .......................................................................................................................6-10
Phase C Data Format.........................................................................................................................6-10
<CAN>, Escape from Reception .........................................................................................................6-10
6.3.6 +FK, Session Termination......................................................................................................................6-10
6.3.7 +FCIG, Set Polling ID ............................................................................................................................6-11
6.3.8 +FLPL, Indicate a Document for Polling .................................................................................................6-11
6.3.9 +FSPL, Enable Polling...........................................................................................................................6-11
6.4 SERVICE CLASS 2 DCE RESPONSES..............................................................................................................6-13
AT Command Reference Manual
6.4.1 +FCON, Facsimile Connection Response ..............................................................................................6-13
6.4.2 +FDCS:, Report Current Session Capabilities ........................................................................................6-13
6.4.3 +FDIS:, Report Remote Station Capabilities...........................................................................................6-13
6.4.4 +FCFR, Indicate Confirmation to Receive ..............................................................................................6-13
6.4.5 +FTSI:, Report the Transmit Station ID..................................................................................................6-13
6.4.6 +FCSI:, Report the Called Station ID......................................................................................................6-13
6.4.7 +FPTS:, Receive Page Transfer Status..................................................................................................6-14
6.4.8 +FET:, Post Page Message Response...................................................................................................6-14
6.4.9 +FPTS:, Transmit Page Transfer Status.................................................................................................6-14
6.4.10 +FHNG:, Call Termination with Status..................................................................................................6-14
6.4.11 +FCIG:, Report the Polled Station ID ...................................................................................................6-15
6.4.12 +FDTC:, Report the Polled Station Capabilities ....................................................................................6-15
6.4.13 +FPOLL, Indicate Polling Request........................................................................................................6-15
6.5 SERVICE CLASS 2 PARAMETERS....................................................................................................................6-16
6.5.1 +FDCC, DCE Capabilities Parameters...................................................................................................6-16
6.5.2 +FDIS, Current Sessions Capabilities Parameters..................................................................................6-16
6.5.3 +FDCS, Current Session Results Parameters........................................................................................6-17
6.5.4 +FLID=, Local ID String .........................................................................................................................6-18
6.5.5 +FCR, Capability to Receive..................................................................................................................6-18
6.5.6 +FPTS=, Page Transfer Status..............................................................................................................6-18
6.5.7 +FCQ, Copy Quality Checking...............................................................................................................6-18
6.5.8 +FPHCTO, DTE Phase C Response Time-out .......................................................................................6-18
6.5.9 +FAXERR, T.30 Session Error Report ...................................................................................................6-19
6.5.10 +FBOR, Data Bit Order........................................................................................................................6-19
6.5.11 +FAA, Answer Parameter....................................................................................................................6-19
6.5.12 +FBUF?, Buffer Size............................................................................................................................6-20
6.6 EXAMPLE SESSIONS........................................................................................................................................6-20
7. VOICE/AUDIO COMMANDS.........................................................................................................................................7-1
7.1 VOICE/AUDIO SUBMODES .................................................................................................................................7-1
7.1.1 Online Voice Command Mode .................................................................................................................7-1
7.1.2 Voice Receive Mode................................................................................................................................7-1
7.1.3 Voice Transmit Mode............................................................................................................................... 7-2
7.2 VOICE/AUDIO CAPABILITIES..............................................................................................................................7-2
7.2.1 Call Establishment - Originate..................................................................................................................7-2
Directed Originate (Dial as a specific modem type)...............................................................................7-2
Adaptive Originate (Dial with Voice/Data/Fax Discrimination)................................................................. 7-2
7.2.2 Call Establishment - Answer ....................................................................................................................7-3
Directed Answer (Answer as a specific modem type)............................................................................7-3
Adaptive Answer (Answer with Voice/Data/Fax Discrimination)..............................................................7-3
7.2.3 Voice/Audio Data Transfer.......................................................................................................................7-4
7.2.4 Tone and Status Monitoring Shielded <DLE> Statuses............................................................................ 7-4
7.2.5 Shielded <DLE> Commands from the DTE..............................................................................................7-6
7.2.6 Voice Record...........................................................................................................................................7-8
7.2.7 Voice Playback........................................................................................................................................7-8
Volume Adjustment During Record .......................................................................................................7-8
Volume Adjustment During Playback ....................................................................................................7-8
7.2.8 Voice Call Termination.............................................................................................................................7-9
Local Disconnect..................................................................................................................................7-9
Remote Disconnect Detection...............................................................................................................7-9
7.2.9 Mode Switching.......................................................................................................................................7-9
Voice to Fax.........................................................................................................................................7-9
Unsuccessful Fax Connection Attempt to Voice .................................................................................... 7-9
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Voice to Data............................................................................................................................... .........7-9
Unsuccessful Data Connection Attempt to Voice...................................................................................7-9
7.2.10 Caller ID................................................................................................................................................7-9
7.3 AT VOICE COMMAND SUMMARY.....................................................................................................................7-10
7.3.1 Global AT Command Set Extensions .....................................................................................................7-10
ATA - Answering in Voice/Audio..........................................................................................................7-11
ATD - Dial Command in Voice/Audio...................................................................................................7-11
ATH - Hang Up in Voice/Audio............................................................................................................7-11
ATZ - Reset from Voice Mode.............................................................................................................7-12
#BDR - Select Baud Rate (Turn off Autobaud)....................................................................................7-12
#CID - Enable Caller ID Detection and Select Reporting Format.........................................................7-12
#CLS - Select Data, Fax, or Voice/Audio.............................................................................................7-14
#MDL? - Identify Model.......................................................................................................................7-14
#MFR? - Identify Manufacturer...........................................................................................................7-14
#REV? - Identify Revision Level..........................................................................................................7-14
7.3.2 AT#V Commands Enabled Only in Voice Mode (#CLS=8)......................................................................7-15
#TL- Audio Output Transmit Level ......................................................................................................7-15
#VBQ? - Query Buffer Size.................................................................................................................7-15
#VBS - Bits Per Sample......................................................................................................................7-15
#VBT - Beep Tone Timer....................................................................................................................7-16
#VCI? - Identify Compression Method.................................................................................................7-16
#VLS - Voice Line Select....................................................................................................................7-17
#VRA - Ringback Goes Away Timer (Originate)..................................................................................7-19
#VRN - Ringback Never Came Timer (Originate)................................................................................7-19
#VRX - Voice Receive ........................................................................................................................7-19
#VSD - Enable Silence Deletion (Voice Receive) [ADPCM].................................................................7-20
#VSK - Buffer Skid Setting..................................................................................................................7-20
#VSP - Silence Detection Period (Voice Receive) [ADPCM]................................................................7-21
#VSR - Sampling Rate Selection.........................................................................................................7-21
#VSS - Silence Detection Tuner (Voice Receive) [ADPCM].................................................................7-22
#VTD - DTMF Tone Reporting............................................................................................................7-23
#VTM - Enable Timing Mark Placement..............................................................................................7-24
#VTS - Generate Tone Signals (Online Voice Command) ...................................................................7-24
#VTX - Voice Transmit........................................................................................................................7-25
#VGT - Set Playback Volume in the Command State..........................................................................7-25
<DLE><u> and <DLE><d> - Set Playback Volume in the Data State...................................................7-25
7.3.3 Speakerphone Commands ....................................................................................................................7-25
Originating a Call in Speakerphone Mode ...........................................................................................7-26
Answering a Call in Speakerphone Mode............................................................................................7-26
Muting the Local Handset During Phone Conversation - Music on Hold...............................................7-26
Recording a Handset Conversation on the Phone Line........................................................................7-27
Recording/Playback from Handset through Sound Chip ......................................................................7-27
#SPK Parameter ................................................................................................................................7-27
Room Monitor.....................................................................................................................................7-29
Switching Between #VLS Settings.......................................................................................................7-29
Reporting of Local Handset Status......................................................................................................7-29
7.3.4 Using VoiceView with Speakerphone, Headset, and Handset modes......................................................7-30
Using Modem as Dialer Prior to VoiceView Mode................................................................................7-31
7.4 S-REGISTERS ...................................................................................................................................................7-32
S30 - Disconnect Inactivity Timer........................................................................................................7-32
7.5 RESULT CODES FOR VOICE OPERATION.......................................................................................................7-32
7.6 EXAMPLES OF VOICE OPERATION .................................................................................................................7-32
8. AT COMMAND SET SUMMARY............................................................................................................................... ....8-1
8.1 BASIC AT COMMANDS........................................................................................................................................8-1
8.2 ECC COMMANDS................................................................................................................................................8-4
8.3 MNP 10 COMMANDS...........................................................................................................................................8-5
AT Command Reference Manual
8.4 W-CLASS COMMANDS........................................................................................................................................8-5
8.5 CALLER ID COMMANDS .....................................................................................................................................8-5
8.6 FAX CLASS 1.......................................................................................................................................................8-5
8.7 FAX CLASS 2.......................................................................................................................................................8-6
8.8 VOICE/AUDIO COMMANDS.................................................................................................................................8-7
8.9 CELLULAR COMMANDS......................................................................................................................................8-7
8.10 AUDIOSPAN AND DSVD COMMANDS ..............................................................................................................8-7
8.11 SYNCHRONOUS ACCESS MODE COMMANDS................................................................................................8-7
9. COMMON CONFIGURATION SETUP STRINGS ..........................................................................................................9-1
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List of Tables
Table 3-1. Result Codes..................................................................................................................................................3-11
Table 4-1. S-Register Summary.........................................................................................................................................4-2
Table 5-1. Fax Class 1 Commands....................................................................................................................................5-1
Table 5-2. Fax Class 1 Calling Sequence (One Page)........................................................................................................5-7
Table 5-3. Fax Class 1 Answering Sequence (One Page).................................................................................................. 5-8
Table 6-1. Fax Class 2 Commands....................................................................................................................................6-2
Table 6-2. T.30 Session Subparameter Codes...................................................................................................................6-7
Table 6-3. T.30 Post Page Message Codes.......................................................................................................................6-8
Table 6-4. T.30 Post Page Response Messages................................................................................................................6-8
Table 6-5. Hang Up Status Codes ...................................................................................................................................6-12
Table 6-6. Send Two Pages, 1-D, No Errors....................................................................................................................6-21
Table 6-7. Receive Two Pages, 1-D Data, No Errors........................................................................................................6-22
Table 7-2. Codes Sent to the DTE.....................................................................................................................................7-5
Table 7-3. Shielded DTE Codes.........................................................................................................................................7-7
Table 7-5. Device Types Supported by #VLS...................................................................................................................7-18
Table 7-6. #VTD Tone Detection/Reporting Bit Settings ...................................................................................................7-23
Table 7-7. Record a Greeting Message ...........................................................................................................................7-33
Table 7-8. Playback a Greeting Message.........................................................................................................................7-35
Table 7-9. Answer Call/Play Greeting/Record Message ...................................................................................................7-36
Table 7-10. Call/Record Message/Receive Fax................................................................................................................ 7-38
Table 7-11. Answer Call, Determine It's a Fax..................................................................................................................7-40
Table 7-12. Adaptive Fax/Data/Voice; Determine Data.....................................................................................................7-41
Table 7-13. Originate a Call, Send Answerer a Message..................................................................................................7-42
List of Figures
AT Command Reference Manual
1. INTRODUCTION
1.1 OVERVIEW
This manual describes the AT commands for the following Rockwell modem families:
RC56ACi RCV56ACFL/SP RCV56ACF/SP RCV56ACF/SVD
RC336ACi RC336ACL RC336ACFL/SP RCV336ACi/SP RCV336ACF/SP RCV336ACF/SVD
RC288ACi RC288ACL RC288ACLW-GSM RCV288ACi/SP
RC144ACi and RC144ATi RC144ACL and RC144ATL RC144ACG RC144ACF/ATF RC144ACFL/ATFL RCV144ACi/SP RCV144ACF/SP
The descriptions apply to all these modems with any differences between modem product families noted. Refer to Modem Firmware Release notes for commands applicable to modem firmware.
ATi, ATL, ATF, and ATFL models support error correction and data compression (ECC) performed by the host CPU and communications software for Windows using the enhanced Rockwell Windows Protocol Interface (RPI or RPI+™) and WinRPI host software module.
1.1.1 Command Syntax
The fundamental DTE interface command syntax is described in Section 2.
1.1.2 Command Descriptions
These commands are grouped into the following categories:
AT commands Section 3 S-Registers Section 4 Fax Class 1 commands Section 5 Fax Class 2 commands Section 6 Voice/Audio commands Section 7 AT Command Summary Section 8
The AT commands are implemented in microcontroller (MCU) firmware for specific modem models. The support for a command category is identified by modem model in the modem designer's guide. Additional configuration and implementation information is available in release notes and/or readme files that accompany MCU firmware release.
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1.1.3 Call Progress and Blacklisting Parameters
The 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.
compatible 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.
1.1.4 ConfigurACE II for Windows Utility Program
The PC-based ConfigurACE II for Windows utility program allows the OEM to customize the 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 register maximum/minimum values Limitation of transmit levels Modification of factory default values Customization of the ATI4 response Customization of fax OEM messages
This program modifies the hex object code which can be programmed directly into the system EPROM. Lists of the generated parameters can be displayed or printed.
Rockwell-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.
The modem MCU firmware can be configured for operation in specific countries by the PC-
Specific MCU firmware configurations may be released that can be directly installed without requiring
1.2 REFERENCE DOCUMENTATION
RC144ACF and RC144ATF Modem Designer's Guide (Order No. 1055) RC144ACF/ASVD and RCV288ACF/ASVD Modem Designer’s Guide (Order No. 1082) RC144ACF/SP and RC144ATF Modem Designer's Guide (Order No. 1046) RC144ACG Modem Designer's Guide (Order No. 1108) RC144ACi and RC144ACL Modem Designer's Guide (Order No. 876) RC144ATi and RC144ATL Modem Designer's Guide (Order No. 897) RC288ACi and RC288ACL Modem Designer's Guide (Order No. 1027) RC288ACL/SVD SP Modem Designer’s Guide (Order No. 1096) RCV336ACL Modem Designer’s Guide (Order No. 1121) RCV56ACF/SP, RCV336ACF/SP, and RC288ACF/SP Modem Designer’s Guide (Order No. 1046) RCV56ACF/SVD and RCV336ACF/SVD Modem Designer’s Guide (Order No. 1105) RCV336ACFL/SVD Modem Designer’s Guide (Order No. 1062) RCV56ACFL/SVD and RCV336ACFL/SVD Modem Designer’s Guide (Order No. 1121) RCV56ACi and RCV336ACi Modem Designer’s Guide (Order No. 1117)
AT Command Reference Manual
2. COMMAND SYNTAX
2.1 DTE/DCE INTERCHANGE CIRCUITS
Communication between the DTE and modem is half duplex (i.e., only one entity 'talks' at a time).
2.2 COMMAND SYNTAX AND GUIDELINES
2.2.1 DTE Commands
The ISO 646 character set (CCITT T.50 International Alphabet 5, American Standard Code for Information Interchange) is used for the issuance of commands and responses. Only the low-order 7 bits of each character are used for commands or parameters; the high-order bit is ignored. Upper case characters are equivalent to lower case characters.
2.2.2 DTE Command Lines
A command line is a string of characters sent from a DTE to the DCE while the DCE is in a command state. Command lines have a prefix, a body, and a terminator. The prefix consists of the ASCII characters “AT” (065, 084) or “at” (097, 116). The body is a string of commands restricted to printable ASCII characters (032 - 126). Space characters (ASCII 032) and control characters other than carriage return <CR> (default value = ASCII 013 = 0Dh, see register S3), backspace <BS> (default value = ASCII 008 = 08h, see register S5), and cancel <cntrl-x> (ASCII 024 = 18h) in the command string are ignored. The default terminator is the <CR> character. Characters that precede the AT prefix are ignored.
2.3 AT COMMAND GUIDELINES
Modem operation is controlled by generic AT commands. These AT commands may be basic AT (i.e., commands preceded by AT, AT&, AT%, AT*, AT\, AT), AT-, or AT#), S-Register (e.g., S6=n), Fax class 1 (e.g., +FTM), Fax class 2 (e.g., +FDCS:), or voice (e.g., #VBS) commands. The command syntax and operation guidelines governing each of these command categories are described in subsequent sections.
2.3.1 Basic Command Syntax
Characters within the command line are parsed as commands with associated parameter values. The basic commands consist of single ASCII characters, or single characters preceded by a prefix character, followed by a decimal parameter (e.g., “&D1"). Missing decimal parameters are evaluated as 0.
2.3.2 Extended Command Syntax
The facsimile commands use extended syntax. They are preceded by the “+F” characters, and they are terminated by the semicolon “:” character (ASCII 059) or by the <CR> that terminates the command line.
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AT Command Reference Manual
3. AT COMMAND SET
3.1 AT COMMAND GUIDELINES
The basic AT commands used to control modem operation are defined in this section. These commands are summarized in Appendix A. All these commands may not be available in a specific product depending upon supported data rates and modes. The default values are typical of a fully configured modem supporting all data rates and options. The actual default value is dependent upon modem firmware as defined by the firmware release notes.
3.1.1 AT Commands, DTE Adaption
Under AT operation, the serial interfaced modem performs an autobaud/autoparity/autolength function on each AT header entered. The autolength/autoparity facility can detect 7- or 8-bit characters of even, odd, or no parity with one stop bit. This is not necessary for the parallel interfaced modem since it has direct access to the UART registers.
3.1.2 AT Command Format
A command line is a string of characters sent from a DTE to the modem (DCE) while the modem is in a command state. A command line has a prefix, a body, and a terminator. Each command line (with the exception of the A/ command) must begin with the character sequence AT and must be terminated by a carriage return. Commands entered in upper case or lower case are accepted, but both the A and T must be of the same case, i.e., "AT" = ASCII 065, 084 or “at” = ASCII 097,
116. The body is a string of commands restricted to printable ASCII characters (032 - 126). Space characters (ASCII 032) and control characters other than CR (ASCII 013) and BS (ASCII 010) in the command string are ignored. The default terminator is the ASCII <CR> character. Characters that precede the AT prefix are ignored. The command line interpretation begins upon receipt of the carriage return character.
Characters within the command line are parsed as commands with associated parameter values. The basic commands consist of single ASCII characters, or single characters preceded by a prefix character (e.g., “&"), followed by a decimal parameter. Missing decimal parameters are evaluated as 0.
The modem supports the editing of command lines by recognizing a backspace character. When modem echo is enabled, the modem responds to receipt of a backspace or delete by echoing a backspace character, a space character, and another backspace. The hex value to be used for the backspace character is programmable through register S5. Values equal to 0 or greater than 127, or the value which corresponds to the carriage return character, cannot be used for the backspace character. This editing is not applicable to the AT header of a command. A command line may be aborted at any time by entering < cntrl-x > (18h).
The AT sequence may be followed by any number of commands in sequence, except for commands such as Z, D, or A. Commands following commands Z, D, or A on the same command line will be ignored. The maximum number of characters on any command line is 39 (including "A" and "T"). If a syntax error is found anywhere in a command line command, the remainder of the line will be ignored and the ERROR result code will be returned.
Most commands entered with parameters out of range will not be accepted and the ERROR response will be returned to the DTE.
Commands will only be 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 re-execute command, will be aborted if another character is entered before completion of the handshake.
3.1.3 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.
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3.2 AT COMMAND SET
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 Rockwell factory profile 0.
3.2.1 AT Commands A/ - Re-execute Command
The modem behaves as though the last command line had been re-sent by the DTE. "A/" will repeat all the commands in the command buffer.
The principal application of this command is to place another call (using the Dial command) that failed to connect due to a busy line, no answer, or a wrong number. This command must appear alone on a command line. This command should not be terminated by a carriage return.
AT= x - Write to Selected S-Register
This command writes the value x to the currently selected S-Register. An S-Register can be selected by using the ATSn command. All of the S-Registers will return the OK response if x is a number. Some registers may not be written due to country specific PTT limitations.
Result Codes
OK For all arguments.
AT? - Read Selected S-Register
This command reads and displays the selected S-Register. An S-Register can be selected by using the ATSn command. Result Codes:
OK For all arguments.
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 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.)
Bn - 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 according to the parameter supplied. Any other line speed will use a CCITT modulation standard. The parameter value, if valid, is written to S27 bit 6. (Also, see ATFn command.)
B0 Selects CCITT operation at 300 or 1200 bps during Call Establishment and a subsequent
connection. (Default for W-class models.)
B1 Selects BELL operation at 300 or 1200 bps during Call Establishment and a subsequent
connection. (Default for US models.)
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
AT Command Reference Manual
Cn - Carrier Control
This command is included for compatibility only, and has no effect other than returning a result code. The only valid parameter is 1.
Result Codes:
OK n = 1. ERROR Otherwise.
Dn - 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. In W-class models, the action of going off-hook is affected by the status of the Line Current Sense input, if line current sensing is enabled, and by the blacklist and delayed list. 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 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.)
NOTE:
If the ATD command is issued before the S1 register has cleared, the modem will
Dial Modifiers. The valid dial string parameters are described below. Punctuation characters may be used for clarity, with parentheses, hyphen, and spaces being ignored.
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.
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@ 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.
En - Command Echo
The modem enables or disables the echo of characters to the DTE according to the parameter supplied. The parameter value, if valid, is written to S14 bit 1.
E0 Disables command echo. E1 Enables command echo. (Default.)
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
AT Command Reference Manual
Fn - Select Line Modulation (RC144 Models Only)
This command selects the line modulation according to the parameter supplied. The line modulation is fixed unless Automode is selected. This command interacts with the S37 and the N command. The parameter value, if valid, is written to S37 bits 0-4. To select line modulation, it is recommended that either the F command, or a combination of the S37 and the N command, be used, but not both.
F0 Selects auto-detect mode. Sets N1 and sets S31 bit 1. In this mode, the modem configures for
automode operation. All connect speeds supported by the modem are possible according to the remote modem's preference. The contents of S37 are ignored as is the sensed DTE speed.
F1 Selects V.21 or Bell 103 according to the B setting as the only acceptable line speed resulting in a
subsequent connection. Sets N0, sets S37 to 1, and clears S31 bit 1. This command is equivalent
to the command string: ATN0S37=1. F2 Not supported. F3 Selects V.23 as the only acceptable line modulation for a subsequent connection. Originator is at
75 bps and answerer is at 1200 bps. Sets N0, sets S37 to 7, and clears S31 bit 1. This command
is equivalent to the command string: ATN0S37=7. F4 Selects V.22 1200 or Bell 212A according to the B command setting as the only acceptable line
speed for a subsequent connection. Sets N0, sets S37 to 5, and clears S31 bit 1. This command
is equivalent to the command string: ATN0S37=5. F5 Selects V.22 bis as the only acceptable line modulation for a subsequent connection. Sets N0,
sets S37 to 6, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=6. F6 Select V.32 bis 4800 or V.32 4800 as the only acceptable line modulation for a subsequent
connection. Sets N0, sets S37 to 8, and clears S31 bit 1. This command is equivalent to the
command string: ATN0S37=8. F7 Selects V.32 bis 7200 as the only acceptable line modulation for a subsequent connection. Sets
N0, sets S37 to 12, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=12.
This setting also allows connection at the Rockwell proprietary 7200 V.32 speed, e.g., with a
RC9696/12 based modem. F8 Selects V.32 bis 9600 or V.32 9600 as the only acceptable line modulations for a subsequent
connection. Sets N0, sets S37 to 9, and clears S31 bit 1. This command is equivalent to the
command string: ATN0S37=9. F9 Selects V.32 bis 12000 as the only acceptable line modulation for a subsequent connection. Sets
N0, sets S37 to 10, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=10.
This setting also allows connection at the Rockwell proprietary 12000 V.32 speed, e.g., with a
RC9696/12 based modem. F10 Selects V.32 bis 14400 as the only acceptable line modulation for a subsequent connection. Sets
N0, sets S37 to 11, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=11.
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Hn - Disconnect (Hang-Up)
This command initiates a hang up sequence. This command may not be available for some countries due to PTT restrictions.
H0 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. H1 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 on-hook after a period of time
determined by S7.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
In - Identification
The modem reports to the DTE the requested result according to the command parameter.
I0 Reports product code. Example: 28800 I1 Calculates the ROM checksum and reports the least significant byte of the checksum in decimal
(see firmware release notes). Reports 255 if the prestored checksum value is FFh. I2 Calculates the ROM checksum and compares it with the prestored checksum. Reports "OK" if the
calculated checksum equals the prestored checksum or if the prestored checksum value is FFh;
otherwise reports “ERROR”. I3 Reports the firmware version (F), basic model (e.g.,V34), application code (A), and interface type
code (I) typically in the form VF.FFF-V34_AI. The application codes are: D = Desktop, L = Low
Power (PCMCIA). The interface type codes are: S = Serial, P = Parallel. Example: V1.400-
V34_DS
Note: If RPI+ is supported, “ROCKWELL RPI (TM)” is appended. I4 Reports OEM defined identifier string in either Hayes-compatible binary format (default) or ASCII
format (selectable by ConfigurACE). Example: RC288ACi (ASCII) I5 Reports Country Code parameter. Example: 022 I6 Reports modem data pump model and internal code revision. Example: RC288DPi Rev 05BA I7 Reports the DAA code resulting from MCU interrogation of the DAA for auto DAA recognition.
Examples: 000 for US or Canada, 016 for Japan, 033 for Belgium, 034 for Finland, 035 for
France, 037 for Italy, 038 for Netherlands, 039 for Sweden, 040 for Switzerland, and 041 for UK.
Result Codes:
OK n = 0 to 7. ERROR Otherwise.
Ln - Speaker Volume
The modem sets the speaker volume control according to the parameter supplied. The parameter value, if valid, is written to S22 bits 0 and 1.
L0 Low volume. L1 Low volume. (Default.) L2 Medium volume. L3 High volume.
Result Codes:
OK n = 0 to 3. ERROR Otherwise.
AT Command Reference Manual
Mn - 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.
M0 Speaker is always off. M1 Speaker is on during call establishment, but off when receiving carrier. (Default.) M2 Speaker is always on. M3 Speaker is off when receiving carrier and during dialing, but on during answering.
Result Codes:
OK n = 0 to 3. ERROR Otherwise.
Nn - Automode Enable
This command enables or disables automode detection. The parameter value, if valid, is written to S31 bit 1.
N0 Automode detection is disabled (equivalent to setting the +MS <automode> subparameter to 0). A
subsequent handshake will be conducted according to the contents of S37 or, if S37 is zero,
according to the most recently sensed DTE speed. N1 Automode detection is enabled (equivalent to setting the +MS <automode> subparameter to 1). A
subsequent handshake will be conducted according the automode algorithm supported by the
modem, e.g., according to the contents of S37 or, if S37 is zero, starting at 28800 bps V.34
(RC288). This command is also equivalent to F0 (RC144). (Default.)
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
Notes:
1. The Nn and S37=x commands override the +MS command settings. When the N0 or N1 command is issued, the +MS subparameters are updated to reflect the Nn and S37 values (see +MS command and S37 register). For example:
N1S37=10 updates the +MS command subparameters to reflect +MS=10,1,300,12000 N0S37=10 updates the +MS command subparameters to reflect +MS=10,0,12000,12000
2. Use of the +MS command is recommended instead of the Nn and S37=x commands. Nn and S37=x commands are supported for compatibility with existing communication software.
On - Return to On-Line Data Mode
This command determines how the modem will enter the on-line data mode. If the modem is in the on-line command mode, the enters the on-line data mode with or without a retrain. If the modem is in the off-line command mode (no connection), ERROR is reported.
O0 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 (+++).
O1 Enters on-line data mode with a retrain before returning to on-line data mode.
Result Codes:
OK n = 0 or 1 and a connection exists. ERROR Otherwise or if not connected.
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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
Qn - Quiet Results Codes Control
The command enables or disables the sending of result codes to the DTE according to the parameter supplied. The parameter value, if valid, is written to S14 bit 2.
Q0 Enables result codes to the DTE. (Default.) Q1 Disables result codes to the DTE.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
Sn - Read/Write S-Register
The modem selects an S-Register, performs an S-Register read or write function, or reports the value of an S-Register.
n Establishes S-Register n as the last register accessed. n=v Sets S-Register n to the value v. n? Reports the value of S-Register n.
The parameter n can be omitted, in which case the last S-Register accessed will be assumed. The S can be omitted for AT= and AT?, in which case the last S-Register 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 beyond the range of the S-Registers available, the modem will return the ERROR message. The value "v" is "MOD"ed with 256. If the result is outside the range permitted for a given S-Register the values will still be stored, but functionally the lower and higher limits will be observed. Input and output are always in decimal format. Note that some S­Registers are read-only.
In some cases, writing to the S-Register 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-Registers may be altered with ConfigurACE.
AT Command Reference Manual
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 S­Register bit to indicate that all subsequent dialing should be conducted in tone mode. Note that 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
Vn - 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.
V0 Enables short-form (terse) result codes. Line feed is not issued before a short-form result code. V1 Enables long-form (verbose) result codes. (Default.)
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
Wn - Connect Message Control
This command controls the format of CONNECT messages. The parameter value, if valid, is written to S31 bits 2 and 3. Note that the Wn command can be overridden by register S95 bits (see S95 description).
W0 Upon connection, the modem reports only the DTE speed (e.g., CONNECT 19200). Subsequent
W1 Upon connection, the modem reports the line speed, the error correction protocol, and the DTE
W2 Upon connection, the modem reports the DCE speed (e.g., CONNECT 14400). Subsequent
Result Codes:
OK n = 0, 1, or 2. ERROR Otherwise.
responses are disabled. (Default.)
speed, respectively. Subsequent responses are disabled.
responses are disabled.
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Xn - Extended Result Codes
This command selects which subset of the result messages will be 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). Note that 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 or 2), the only message sent to indicate a connection is CONNECT without a speed indication.
X0 Disables monitoring 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.
X1 Disables monitoring 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.
X2 Disables monitoring of busy tones unless forced otherwise by country requirements; send only
OK, CONNECT, RING, NO CARRIER, ERROR, NO DIALTONE, 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.
X3 Enables monitoring 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.
X4 Enables monitoring of busy tones; send all messages. The value 111b is written to S22 bits 6, 5,
and 4, respectively. (Default.)
Result Codes:
OK n = 0 to 4. ERROR Otherwise.
AT Command Reference Manual
Table 3-1. Result Codes
Short Form Long Form n Value in ATXn Command Notes
01234
0OK xxxxx 1 CONNECT xxxxx 2 RING xxxxx 3 NO CARRIER xxxxx 4 ERROR xxxxx 5 CONNECT 1200 1 xxxx 6 NO DIALTONE 3 3 x x x 7 BUSY 3 3 3 x x 8 NO ANSWER xxxxx
9 CONNECT 0600 1 xxxx 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 xxxxxNote 4 22 CONNECT 75TX/1200RX 1 xxxx 23 CONNECT 1200TX/75RX 1 xxxx 24 DELAYED 4444x 32 BLACKLISTED 4444x 33FAX xxxxx 35 DATA xxxxx 40 CARRIER 300 xxxxx 44 CARRIER 1200/75 xxxxx 45 CARRIER 75/1200 xxxxx 46 CARRIER 1200 xxxxx 47 CARRIER 2400 xxxxx 48 CARRIER 4800 xxxxx 49 CARRIER 7200 xxxxx 50 CARRIER 9600 xxxxx 51 CARRIER 12000 xxxxx 52 CARRIER 14400 xxxxx 53 CARRIER 16800 xxxxxNote 2 54 CARRIER 19200 xxxxxNote 2 55 CARRIER 21600 xxxxxNote 2 56 CARRIER 24000 xxxxxNote 2 57 CARRIER 26400 xxxxxNote 2 58 CARRIER 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 (Cont'd)
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 COMPRESSION: CLASS 5 xxxxx 67 COMPRESSION: V.42 bis xxxxx 69 COMPRESSION: NONE xxxxx 70 PROTOCOL: NONE xxxxx 77 PROTOCOL: LAPM xxxxx 78 CARRIER 31200 xxxxxNote 3 79 CARRIER 33600 xxxxxNote 3 80 PROTOCOL: ALT xxxxx 81 PROTOCOL: ALT-CELLULAR xxxxx 84 CONNECT 33600 1 x x x x Note 3 91 CONNECT 31200 1 x x x x Note 3
150 CARRIER 32000 xxxxxNote 4 151 CARRIER 34000 xxxxxNote 4 152 CARRIER 36000 xxxxxNote 4 153 CARRIER 38000 xxxxxNote 4 154 CARRIER 40000 xxxxxNote 4 155 CARRIER 42000 xxxxxNote 4 156 CARRIER 44000 xxxxxNote 4 157 CARRIER 46000 xxxxxNote 4 158 CARRIER 48000 xxxxxNote 4 159 CARRIER 50000 xxxxxNote 4 160 CARRIER 52000 xxxxxNote 4 161 CARRIER 54000 xxxxxNote 4 162 CARRIER 56000 xxxxxNote 4 165 CONNECT 32000 xxxxxNote 4 166 CONNECT 34000 xxxxxNote 4 167 CONNECT 36000 xxxxxNote 4 168 CONNECT 38000 xxxxxNote 4 169 CONNECT 40000 xxxxxNote 4 170 CONNECT 42000 xxxxxNote 4 171 CONNECT 44000 xxxxxNote 4 172 CONNECT 46000 xxxxxNote 4 173 CONNECT 48000 xxxxxNote 4 174 CONNECT 50000 xxxxxNote 4 175 CONNECT 52000 xxxxxNote 4 176 CONNECT 54000 xxxxxNote 4 177 CONNECT 56000 xxxxxNote 4 +F4 +FCERROR xxxxx
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. RC288 and higher rate modems.
3. RC336 and higher rate modems.
4. RC56 modems.
AT Command Reference Manual
Yn - Long Space Disconnect
This command enables/disables the generation and response to long space disconnect. The parameter value, if valid, is written to S21 bit 7.
Y0 Disables long space disconnect. (default.) Y1 Enables long space disconnect. In non-error correction mode, the modem will send a long space
of four seconds prior to going on-hook. In non-error correction mode, the modem will respond to the receipt of a long space (i.e., a break signal greater than 1.6 seconds) by going on-hook.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
Zn - Soft Reset and Restore Profile
The modem performs a soft reset and restores (recalls) the configuration profile according to the parameter supplied. If no parameter is specified, zero is assumed.
Z0 Soft reset and restore stored profile 0. Z1 Soft reset and restore stored profile 1.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
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3.2.2 AT& Commands &Cn - 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.
&C0 RLSD remains ON at all times. &C1 RLSD follows the state of the carrier. (Default.)
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
&Dn - 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.
&D0 - 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, &Q4 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.
&D1 DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q1, &Q4, &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.
&D2 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.)
&D3 DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q1, &Q4, &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.
&Fn - Restore Factory Configuration (Profile)
The modem loads the factory default configuration (profile). The factory defaults are identified for each command and in the S-Register descriptions. A configuration (profile) consists of a subset of S-Registers.
&F0 Restore factory configuration 0. &F1 Restore factory configuration 1.
Result Codes:
OK ERROR If the modem is connected.
AT Command Reference Manual
&Gn - Select Guard Tone
The modem generates the guard tone selected by this command according to the parameter supplied (DPSK modulation modes only). The parameter value, if valid, is written to S23 bits 6 and 7.
&G0 Disables guard tone. (Default for US models.) &G1 Disables guard tone. &G2 Selects 1800 Hz guard tone. (Default for W-class models.)
This command may not be permitted in some countries. Result Codes:
OK n = 0 to 2. ERROR Otherwise.
&Jn - Telephone Jack Control
This command is included only for compatibility and performs no function except to load the S-Register. The parameter value, if valid, is written S21 bit 1.
&J0 &J0 command. (Default.) &J1 &J1 command.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
&Kn - 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.
&K0 Disables flow control. &K3 Enables RTS/CTS flow control. (Default for data modem modes.) &K4 Enables XON/XOFF flow control. &K5 Enables transparent XON/XOFF flow control. &K6 Enables both RTS/CTS and XON/XOFF flow control. (Default for fax modem and voice modes.)
Result Codes:
OK n = 0, 3, 4, 5, or 6. ERROR Otherwise.
&Ln - 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.
&L0 Requests dial-up operation. Dial-up operation continues.
Result Codes:
OK n = 0. ERROR Otherwise.
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&Mn - Asynchronous/Synchronous Mode Selection
This command determines the DTR operating mode. The modem treats the &M command as a subset of the &Q command.
&M0 Selects direct asynchronous operation. Note that 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).
&M1 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.)
&M2 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.)
&M3 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.)
Result Codes:
OK n = 0 to 3. ERROR Otherwise.
&Pn - 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.
&P0 Selects 39%-61% make/break ratio at 10 pulses per second. (Default.) &P1 Selects 33%-67% make/break ratio at 10 pulses per second. &P2 Selects 39%-61% make/break ratio at 20 pulses per second. &P3 Selects 33%-67% make/break ratio at 20 pulses per second.
Result Codes:
OK n = 0 to 3. ERROR Otherwise.
AT Command Reference Manual
&Qn - 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 &Q4 command is issued to select the mode, the subsequent connect message will report the DCE
speed regardless of the W command and S95 settings.
&Q0 Selects direct asynchronous operation. The value 000b is written to S27 bits 3, 1, and 0,
respectively. See &M0.
&Q1 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.)
&Q2 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.)
&Q3 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.)
&Q4 Selects AutoSync operation. The value 100b is written to S27 bits 3, 1, and 0, respectively.
AutoSync operation, when used in conjunction with the Hayes Synchronous Interface (HSI) capability in the DTE, provides synchronous communication capability from an asynchronous terminal.
Starting AutoSync.
AutoSync operation with &Q4. After the CONNECT message is issued, the modem waits the period of time specified by S25 before examining DTR. If DTR is on, the modem enters the synchronous operating state; if DTR is off, the modem terminates the line connection and returns to the asynchronous command state.
Stopping AutoSync.
transition of DTR. Loss of carrier will cause the modem to return to the asynchronous command state. An on-to-off transition of DTR will cause the modem to return to the asynchronous command state and either not terminate the line connection (&D1 active) or terminate the line connection (any other &Dn command active).
&Q5 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.)
&Q6 Selects asynchronous operation in normal mode (speed buffering). The value 110b is written to
S27 bits 3, 1, and 0, respectively.
Result Codes:
Set registers S19, S20, and S25 to the desired values before selecting
AutoSync operation is stopped upon loss of carrier or the on-to-off
OK n = 0 to 6. ERROR Otherwise.
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&Rn - 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.
&R0 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.
&R1 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 n = 0 or 1. ERROR Otherwise.
&Sn - DSR Override
This command selects how the modem will control DSR. The parameter value, if valid, is written to S21 bit 6.
&S0 DSR will remain ON at all times. (Default.) &S1 DSR will become active after answer tone has been detected and inactive after the carrier has
been lost.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
&Tn - Test and Diagnostics
The modem will perform selected test and diagnostic functions according to the parameter supplied. A test can be run only when in an asynchronous operation in non-error-correction mode (normal or direct mode). To terminate a test in progress, the escape sequence must be entered first, except for parameters 7 and 8 (see Section 3.1.3). If S18 is non-zero, a test will terminate automatically after the time specified by S18 and display the OK message. Note: For tests 3, 6, and 7, a connection between the two modems must first be established.
&T0 Terminates test in progress. Clears S16. &T1 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. &T2 Returns ERROR. &T3 Initiates local digital loopback, V.54 Loop 2. Sets S16 bit 2. If no connection exists, ERROR is
returned. Sets S16 bit 4 when the test is in progress. &T4 Enables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote
modem is allowed. Sets S23 bit 0. &T5 Disables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote
modem is denied. Clears S23 bit 0. (Default.) &T6 Requests a remote digital loopback (RDL), V.54 Loop 2, without self test. If no connection exists,
ERROR is returned. Sets S16 bit 4 when the test is in progress. The CONNECT XXXX message
is displayed upon the start of the test. &T7 Requests a remote digital loopback (RDL),V.54 Loop 2, with self test. (In self test, a test pattern is
looped back and checked by the modem.) If no connection exists, ERROR is returned. When the
test is terminated either via expiration of S18, or via the &T0 or H command, the number of
detected errors is reported to the DTE. Sets S16 bit 5 when the test is in progress. &T8 Initiates local analog loopback, V.54 Loop 3, with self test. (In self test, a test pattern is looped
back and checked by the modem.) If a connection exists, the modem hangs up before the test is
initiated. When the test is terminated either via expiration of S18, or via the &T0 or H command,
the number of detected errors is reported to the DTE. Sets S16 bit 6 when the test is in progress.
This command may not be available in some countries due to PTT restrictions.
AT Command Reference Manual
&V - Display Current Configuration and Stored Profiles
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: B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 &Y0 S00:002 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:030 S08:002 S09:006 S10:014 S11:255 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138 S48:007 S95:000
STORED PROFILE 0: B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007 S37:000 S40:105 S41:003 S46:138 S95:000
STORED PROFILE 1: B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007 S37:000 S40:105 S41:003 S46:138 S95:000
TELEPHONE NUMBERS: 0 = 1 = 2 = 3 =
OK
3.2.3 &V1 - Display Last Connection Statistics
Displays the last connection statistics in the following format (shown with typical results):
TERMINATION REASON.......... LINK DISCONNECT or LOCAL REQUEST
LAST TX data rate........... 33600 BPS
HIGHEST TX data rate........ 33600 BPS
LAST RX data rate........... 28800 BPS
HIGHEST RX data rate........ 28800 BPS
Error correction PROTOCOL ... LAPM
Data COMPRESSION............ V42Bis
Line QUALITY................ 030
Highest SPX RX state........ 068
Highest SPX TX state........ 067
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&Wn - Store Current Configuration
Saves the current (active) configuration (profile), including S-Registers, 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 an Zn command or at power up (see &Yn command).
&W0 Store the current configuration as profile 0. &W1 Store the current configuration as profile 1.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
&Xn - 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.
&X0 Selects internal timing. The modem generates the transmit clock signal and applies it to the
TXCLK output at the serial interface. &X1 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. &X2 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 n = 0 to 2. ERROR Otherwise.
&Yn - Designate a Default Reset Profile
Selects which user profile will be used after a hard reset.
&Y0 The modem will use profile 0. &Y1 The modem will use profile 1.
Result Codes:
OK n = 0 to 1. ERROR If n > 1, or if NVRAM is not installed or is not operational.
&Zn=x - Store Telephone Number
The modem can store up to four telephone numbers and each telephone number dial string can contain up to 34 digits.
&Zn=x n = 0 to 3 and x = dial string. (Requires 256-byte NVRAM.)
Result Codes:
OK For n ≤ 3, and x ≤ 34 digits. ERROR If n > 3, x > 35 digits, or if NVRAM is not installed or is not operational.
AT Command Reference Manual
3.2.4 AT% Commands %En - 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.
%E0 Disable line quality monitor and auto-retrain. %E1 Enable line quality monitor and auto-retrain. %E2 Enable line quality monitor and fallback/fall forward. (Default.)
Result Codes:
OK n = 0, 1, or 2. ERROR Otherwise.
Fallback/Fall Forward.
the modem will initiate a rate renegotiation to a lower speed within the V.34/V.32 bis/V.32 (RC288) or V.32 bis/V.32 (RC144) 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.
When %E2 is active, the modem monitors the line quality (EQM). When line quality is insufficient,
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.
%L - 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
%Q - 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.
not
at the telephone line connector. For example, 009 = -9 dBm, 043 = -43 dBm, and so on.
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%7 - Plug and Play Serial Number
%7<8 hex numbers><same 8 hex numbers><cr> - Sets 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
Rockwell 11575 Plug and Play device. Example:
AT%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>.
%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 Rockwell 11575 Plug and Play device.
Example:
AT%8<3 ASCII characters><4 hex numbers><same 3 ASCII characters><same 4 hex
Result Codes:
OK <3 ASCII characters><4 hex numbers><same 3 ASCII characters><same 4 hex ERROR Otherwise
numbers><cr>
numbers>
AT Command Reference Manual
3.2.5 AT\ Commands \Kn - Break Control
Controls the response of the modem to a break received from the DTE or the remote modem or the \B command according to the parameter supplied. The parameter value, if valid, is written to S40 bits 3, 4, and 5.
The response is different in three separate states. The first state is where the modem receives a break from the DTE when the modem is operating in data transfer mode:
\K0 Enter on-line command mode, no break sent to the remote modem. \K1 Clear data buffers and send break to remote modem. \K2 Same as 0. \K3 Send break to remote modem immediately. \K4 Same as 0. \K5 Send break to remote modem in sequence with transmitted data. (Default.)
The second case is where the modem is in the on-line command state (waiting for AT commands) during a data connection, and the \B is received in order to send a break to the remote modem:
\K0 Clear data buffers and send break to remote modem. \K1 Clear data buffers and send break to remote modem. (Same as 0.) \K2 Send break to remote modem immediately. \K3 Send break to remote modem immediately. (Same as 2.) \K4 Send break to remote modem in sequence with data. \K5 Send break to remote modem in sequence with data. (Same as 4.) (Default.)
The third case is where a break is received from a remote modem during a non-error corrected connection:
\K0 Clears data buffers and sends break to the DTE. \K1 Clears data buffers and sends break to the DTE. (Same as 0.) \K2 Send a break immediately to DTE. \K3 Send a break immediately to DTE. (Same as 2.) \K4 Send a break in sequence with received data to DTE. \K5 Send a break in sequence with received data to DTE. (Same as 4.) (Default.)
Result Codes:
OK n = 0 to 5. ERROR Otherwise.
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\Nn - 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.
\N0 Selects normal speed buffered mode (disables error-correction mode). (Forces &Q6.) \N1 Serial interface selected - Selects direct mode and is equivalent to &M0, &Q0 mode of operation.
(Forces &Q0.)
Parallel interface selected - Same as \N0. \N2 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.) \N3 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.) \N4 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. \N5 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 n = 0 to 5. ERROR Otherwise.
\Vn - Single Line Connect Message Enable
The single line connect message format can be enabled or disabled by the \Vn command as follows:
\V0 Connect messages are controlled by the command settings X, W, and S95. \V1 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, or COMPRESSION 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 = “V32” for V.32 or V.32bis modulations.
“V34” for V.34 modulations. Note: Modulation is omitted for all other modulations.
Protocol = “NONE” for no protocol.
“ALT” for Microcom Network Protocol. “LAPM” for LAP-M protocol.
Compression = “CLASS5” for Microcom MNP5 compression.
“V42BIS” 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.
AT Command Reference Manual
Voice and Data = Blank for Data mode only.
“SVD” for AudioSpan analog simultaneous audio/voice and data. “DSVD” for G.729A or DigiTalk digital simultaneous voice and data.
3.2.6 AT+ Commands +MS - Select Modulation
This extended-format command selects the modulation and, optionally, enables or disables automode, specifies the lowest and highest connection rates, selects µ-Law or A-Law codec type, and enables or disables robbed bit signaling generation (server modem) or detection (client modem) using one to five subparameters. The command format is:
+MS= <mod> [,[<automode>][,[<min_rate>][,[<max_rate>][,[<x_law>][,[< rb_signaling>]]]]]]<CR>
Notes:
1. For 14400 bps and lower speeds, the Nn command and S37 register can alternatively be used, in which case the +MS subparameters will modified to reflect the Nn and S37=x settings. Use of the Nn and S37=x commands is not recommended but is provided for compatibility with existing communication software. (S37 is not updated by the +MS command.)
2. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain at their current values.
Reporting Selected Options
The modem can send a string of information to the DTE consisting of selected options using the following command:
+MS?
The response is:
+MS: <mod>,<automode>,<min_rate>,<max_rate>,<x_law>,<rb_signaling>
For example,
+MS: 56,1,300,56000,0,0 [RC56 default values] +MS: 11,1,300,33600,0,0 [RC336 default values] +MS: 10,1,300,14400,0,0 [RC144 default values]
Reporting Supported Options
The modem can send a string of information to the DTE consisting of supported options using the following command:
+MS=?
The response is:
+MS: (list of supported <mod> values), (list of supported <automode> values),(list of supported <min_rate> values), (list of supported <max_rate> values), (list of supported <x_law> values), (list of supported <rb_signaling> values)
For example,
+MS: (0,1,2,3,9,10,11,56, 64,69),(0,1),(300-33600),(300-56000),(0,1),(0,1) [RC56] +MS: (0,1,2,3,9,10,11,64,69),(0,1),(300-33600),(300-33600),(0,1),(0,1) [RC336] +MS: (0,1,2,3,9,10,64,69),(0,1),(300-14400),(300-14400),(0,1),(0,1) [RC144]
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Subparameter Definitions
1. <mod> = A decimal number which specifies the preferred modulation (automode enabled) or the modulation (automode disabled) to use in originating or answering a connection. The options are:
<mod> Modulation
0 1 2 3
9 10 11
56
64 69
Notes:
1. See optional <automode>, <min_rate>, and <max_rate> subparameters.
2. For V.23, originating modes transmit at 75 bps and receive at 1200 bps; answering modes transmit at 1200 bps and receive at 75 bps. The rate is always specified as 1200 bps.
The modem may also automatically switch to another modulation (automode), subject to the following constraints:
a. The modem may not be able to automatically switch from the current modulation (specified by <mod>) to some
other modulation. For example, there is no standard way to automode from Bell 103 to V.23.
V.21 300 V.22 1200 V.22 bis 2400 or 1200 V.23 1200 See Note 2 V.32 9600 or 4800 V.32 bis 14400, 12000, 9600, 7200, or 4800 Default for RC144 V.34 33600, 31200, 28800, 26400, 24000, 21600,
19200, 16800, 14400, 12000, 9600, 7200, 4800, or 2400
K56flex 56000, 54000, 52000, 50000, 48000, 46000,
44000, 42000, 40000, 38000, 36000, 34000, 32000 Bell 103 300 Bell 212 1200
Possible Rates (bps)
1
Default for RC56/RC336/RC288 [RC56/RC336/RC288 only]
[RC56 only]
Notes
b. The DTE may disable automode operation (see <automode> below). c. The DTE may constrain the range of modulations available by specifying the lowest and highest rates (see
<min_rate> and <max_rate> below).
2. <automode> is an optional numeric value which enables or disables automatic modulation negotiation using V.8 bis/V.8 or V.32 bis Annex A. The options are:
<automode> Option Selected Notes
0 1
The default value is 1, which enables automode. Note, however, there are modulations for which there is no automatic negotiation, e.g., Bell 212 (<mod> = 69).
For <automode> = 0 (automode disabled, i.e., fixed modulation):
a. If <max_rate> is within the rates supported by the selected modulation, the selected rate is that specified by
<max_rate>. For example: +MS=10,0,1200,4800 selects V.32 bis 4800 bps fixed rate.
b. If <max_rate> is greater than the highest speed supported by the modulation specified by <mod>, the starting
rate is the highest rate supported by the selected modulation. For example: +MS=10,0,2400,14400 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.
Automode disabled Automode enabled using V.8 bis/V.8 or V.32 Annex A Default
AT Command Reference Manual
c. To emulate issuance of the N0S37=x command sequence to select fixed mode operation, specify the
<max_rate> and <min_rate> both to be the (same) requested speed, and <mod> to be the modulation for that speed. For example:
+MS=11,0,16800,16800 selects V.34 16800 bps fixed mode (no comparable S37 command). +MS=10,0,12000,12000 selects V.32 bis 12000 bps fixed mode (same as N0S37=10).
For <automode> = 1 (automode enabled, i.e., automatically selected speed and modulation):
The modem connects at the highest possible rate in accordance with V.8 bis/V.8, or V.32 bis Annex A if V.8 bis/V.8 is not supported by the remote modem.
a. If <max_rate> is greater than the highest rate supported by the modulation specified by <mod>, the modem
automodes down from the highest rate of the selected modulation. For example: +MS=10,1,1200,24000 selects automoding down from V.32 bis 14400 bps.
b. To emulate issuance of the N1S37=x sequence command, specify the modulation and the rate to start
automoding down from using <mod> and <max_rate>, respectively. Set <min_rate> to 300 to allow automoding all the way down to V.21 300 bps. For example:
+MS=11,1,300,16800 selects automode starting at V.34 16800 bps (no comparable S37 command). +MS=9,1,300,12000 selects automode starting at V.32 bis 12000 bps (same as N1S37=10).
3. <min_rate> is an optional number which specifies the lowest rate at which the modem may establish a connection. The value is decimal coded, in units of bps, e.g., 2400 specifies the lowest rate to be 2400 bps. The default is 300 for 300 bps.
4. <max_rate> is an optional number which specifies the highest rate at which the modem may establish a connection. The
value is decimal coded, in units of bps, e.g., 14400 specifies the highest rate to be 14400 bps. The default is 28800 for 28800 bps.
5. <x_law> is an optional number which specifies the codec type. The options are:
0 = µ-Law 1 = A-Law Note that ATZ will reset the <x_law> selection to 0 (µ-Law).
6. <rb_signaling> is an optional number which enables or disables robbed bit signaling generation in a server modem or enables or disables robbed bit signaling detection in a client modem. The options are:
0 = Robbed bit signaling generation (server modem ) or detection (client modem) disabled (default) 1 = Robbed bit signaling generation (server modem ) or detection (client modem) enabled Note that ATZ will reset the <rb_signaling> selection to 0 (disabled).
Result Codes:
OK Valid subparameter string ERROR Otherwise.
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+Hn - Enable/Disable RPI and DTE Speed
This command enables or disables Rockwell Protocol Interface (RPI) processing and sets the DTE speed. (Applicable only to modems supporting RPI and RPI+).
+H0 Disable protocol interface and video ready mode. +H1 Enable RPI mode and set DTE speed to 19200 bps. +H2 Enable RPI mode and set DTE speed to 38400 bps. +H3 Enable RPI mode and set DTE speed to 57600 bps. +H11 Enable RPI+ mode (applicable only to modems supporting RPI). 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.
+H16 Enable video ready mode
Result Codes:
OK n = 0 to 3, 11, 16. ERROR Otherwise.
AT Command Reference Manual
3.2.7 AT** Command ** - Download to Flash Memory
The linear flash memory downloader in the modem firmware 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 (downloads) the data to the flash memory device. Note that this downloader function must be provided in modem MCU firmware initially installed in external flash memory, i.e., the downloader does not support the programming of blank flash memory.
Programming 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. 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. The user will then load the new modem firmware which the FLM will then program into the flash memory device.
Procedure:
1. Install in the modem a flash memory programmed with the modem firmware; ensure that the flash memory device is programmed with the sector secure mode set to UNSECURE (AMD only), otherwise the device cannot be re­programmed in the modem.
2. Put the FLM file and the new modem firmware file (e.g., V1400DS.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 57600 bps (57600 bps is faster) and RTS/CTS flow control. A load at 57600 bps will take approximately 2 minutes; a load at 19200 bps will take approximately 6 minutes.
4. Check the modem for response by typing AT.
5. Initiate the download process using the AT**n command, where:
AT** or AT**0 Download speed is the last sensed speed (recommended command). AT**1 Download speed is 38.4k bps. AT**2 Download speed is 57.6k bps.
The "Download Initiated" message appears upon issuing the AT**n command.
6. Perform an ASCII upload of the FLM file (e.g., AMDE.S37) 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).
To abort the load at this point, wait for the FLM download process to time-out, send a bad S37 record, or reset (POR) the modem. If the load process times-out, the modem must be reset (ATZ) before the FLM can be loaded again.
7. After the FLM has been loaded, perform an ASCII upload of the new modem firmware hex file (e.g., RC288ACi.S37) from the host computer to the modem RAM using an industry standard communications software or an equivalent process. There will be a 3-second pause after the first record of the RC288AXX.S37 file is sent, which is the FLASH erase cycle.
If the flash download fails (because of a bad .S37 record for example) or the upload is aborted, as long as the modem is not turned off or reset, it will remain in the flash load cycle and the upload can be re-attempted at step 7.
There is no turning back at this point.
A "Wrong Device" message is displayed if an incorrect FLM is used. In this case, restart at step 5 and upload the correct FLM file.
A "Wrong Hex file or flow control" message is displayed if an incompatible hex file format is used (non-Motorola S3 format) or if the DTE ignores flow control (the flash download uses both Xon/Xoff and RTS/CTS flow control). If the wrong format was used, reinitiate the upoad at step 7 using a correct firmware hex file.
8. A "Device successfully programmed" message is displayed by the FLM at the completion of a successful download and the modem will do a cold start.
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3.2.8 AT- Commands
-SDR=n - Enable/Disable Distinctive Ring
This command enables or disables detection and reporting of distinctive ring. The syntax is AT-SDR=n, where n is a number from 0 to 7. One, two, or three distinctive ring types can be simultaneously enabled depending upon the value of n (bit mapped). The detected ring type is reported in the long form (verbose) of the result code by appending the ring type number to the end of the RING message.
-SDR=0 Disables Distinctive Ring. Any valid ring detected is reported as RING (default).
-SDR=1 Enables Distinctive Ring Type 1.
-SDR=2 Enables Distinctive Ring Type 2.
-SDR=3 Enables Distinctive Ring Type 1 and 2.
-SDR=4 Enables Distinctive Ring Type 3.
-SDR=5 Enables Distinctive Ring Type 1 and 3.
-SDR=6 Enables Distinctive Ring Type 2 and 3.
-SDR=7 Enables Distinctive Ring Type 1, 2, and 3.
Result Codes:
OK n = 0 to 7. ERROR Otherwise.
The n value bit map is:
Bit 0=1 Enable RING type 1. RING type 1 is detected and reported as RING1. Bit 1=1 Enable RING type 2. RING type 2 is detected and reported as RING2. Bit 2=1 Enable RING type 3. RING type 3 is detected and reported as RING3.
The ring types supported and the corresponding ring cadence detect criteria are:
Distinctive
Ring Type
1 2 3
Notes:
1. The Ring Indicate (RI) output does not toggle on the first ring if AT-SDR_0.
2. The RI output waveform is the same for all ring types detected, i.e., RI is on for the total duration of the ring period.
2.0 sec ON, 4.0 sec OFF.
0.8 sec ON, 0.4 sec OFF, 0.8 sec ON, 4.0 sec OFF.
0.4 sec ON, 0.2 sec OFF, 0.4 sec ON, 0.2 sec OFF, 0.8 sec ON, 4.0 sec OFF.
Ring Cadence Detect Criteria
AT Command Reference Manual
3.3 ERROR DETECTION AND DATA COMPRESSION COMMANDS
3.3.1 AT% Commands %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.
%C0 Disables data compression. Resets S46 bit 1. %C1 Enables MNP 5 data compression negotiation. Resets S46 bit 1. %C2 Enables V.42 bis data compression. Sets S46 bit 1. %C3 Enables both V.42 bis and MNP 5 data compression. Sets S46 bit 1. (Default.)
Result Codes:
OK n = 0, 1, 2, or 3. ERROR Otherwise.
3.3.2 AT\ Commands \An - Select Maximum MNP Block Size
The modem will operate an MNP error corrected link using a maximum block size controlled by the parameter supplied. The parameter value, if valid, is written to S40 bits 6 and 7.
\A0 64 characters. \A1 128 characters. (Default.) \A2 192 characters. \A3 256 characters.
Result Codes:
OK n = 0 to 3. ERROR Otherwise.
\Bn - 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.
\B1-\B9 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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3.4 MNP 10 COMMANDS
3.4.1 AT) Commands )Mn - Enable Cellular Power Level Adjustment
This command is included only for compatibility and performs no function.
)M0 )M0 command. )M1 )M1 command. )M2 )M2 command.
Result Codes:
OK n = 0 to 2. ERROR Otherwise.
*Hn - Link Negotiation Speed
This command is included only for compatibility and performs no function.
*H0 *H0 command. *H1 *H1 command. *H2 *H2 command.
Result Codes:
OK n = 0 to 2. ERROR Otherwise.
-Kn - 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.
-K0 Disables V.42 LAPM to MNP 10 conversion. (Default.)
-K1 Enables V.42 LAPM to MNP 10 conversion.
-K2 Enables V.42 LAPM to MNP 10 conversion; inhibits MNP Extended Services initiation during V.42 LAPM answer mode detection phase.
Result Codes:
OK n = 0 or 2. ERROR Otherwise.
-Qn - Enable Fallback to V.22 bis/V.22
This command is included only for compatibility and performs no function.
-Q0 -Q0 command.
-Q1 -Q1 command.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
AT Command Reference Manual
-SEC=n - Enable/Disable MNP10-EC
Enables or disables MNP10-EC operation. The command format is:
-SEC=n,[<tx level>] where <tx level> is the optional transmit level sub parameter.
-SEC=0 Disable MNP10-EC; the transmit level is that defined in S91.
-SEC=1,[<tx level>] Enable MNP10-EC; the transmit level will be defined by the sub parameter <tx level>
range 0 to 30 (0 dBm to -30 dBm), the default <tx level> (<tx level> not specified) is the S91 value.
Result Codes:
OK n=0, 1, or 1 and <tx level>=0 to 30 ERROR Otherwise
Example: AT-SEC=1,18 enables MNP10-EC and sets the transmit level to -18 dBm.
Note:
If AT-SEC=0, the modem will automatically set AT-SEC=1 if the remote modem indicates Cellular in the V.8 bis/V.8
phase or if a Cellular Driver is loaded and the Cell Phone is attached.
Inquiries
AT-SEC? Retrieves the current -SEC command settings, e.g., 1,18.
@Mn - Initial Cellular Power Level Setting
This command is included only for compatibility and performs no function.
@M0 @M0 command. . . . @M30 @M30 command.
Result Codes:
OK n = 0 to 30. ERROR Otherwise.
:E - Compromise Equalizer Enable Command
This command is included only for compatibility and performs no function.
:E0 :E0 command. :E1 :E1 command.
Result Codes:
OK n = 0 or 1. ERROR Otherwise.
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3.5 W-CLASS COMMANDS
3.5.1 AT* Commands *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.
Example:
NO. - PHONE NUMBER -
------ -----------------------------­1; 4175537660
2; 8288924961 3; 3887278862 4; 3124839442 5; 6284664
OK
*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.
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
AT Command Reference Manual
*NCn - Country Select
Up to four sets of country parameters may be stored in the EPROM. This command checks to see if the entered number matches the country code of one of the countries stored in the EPROM. If found, the modem stores the location of that country in NVRAM. Upon power up or a soft reset (Z command), the modem uses this location to load the parameters for the corresponding country. The default value of zero is used if no NVRAM is installed or the NVRAM failed self test during reset.
Note:
Automatic DAA country code recognition is enabled by the *NC0 command (the 0 country code is reserved for this
function). Automatic DAA country code recognition is disabled by the *NCn command selecting any other valid country code.
*NCn Select country parameters corresponding to entered country code (n). The country codes are:
Country Code (n )
Australia 40 Austria 1 Belgium 2 Bulgaria 27 Canada 20 China 41 Czech Republic 19 Denmark 3 Finland 4 France 5 Germany 6 Greece 17 Hong Kong 42 Hungary 23 India 30 Ireland 7 Israel 18 Italy 8 Japan 43 Korea 44 Luxembourg 9 Mexico 21 Netherlands 10 New Zealand 48 Norway 11 Philippines 43 Poland 24 Portugal 12 Russia 25 Singapore 47 Slovac Republic 26 Spain 13 Sweden 14 Switzerland 15 Taiwan 46 United Kingdom 16 United States 22
Result Codes:
OK If parameters corresponding to entered country code are present in EPROM. ERROR Otherwise.
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3.6 CALLER ID COMMANDS
3.6.1 AT#CID Command #CIDn - Caller ID
Enables or disables Caller ID.
#CID=0 Disables Caller ID. (Default.) #CID=1 Enables Caller ID with formatted presentation to the DTE. The modem will present the data items
in a <Tag><Value> pair format. The expected pairs are data, time, caller code (telephone number), and name.
#CID=2 Enables Caller ID with unformatted presentation to the DTE. The modem will present the entire
packet of information, excluding the leading U's, in ASCII printable hex numbers.
Result Codes:
OK n = 0 or 2. ERROR Otherwise.
Inquiries
#CID? Retrieves the current Caller ID mode from the modem. #CID=? Returns the mode capabilities of the modem in a list with each element separated by commas.
Formatted Form Reporting
The modem presents the data in the <tag> = <value> pair format as described in the table below. Spaces are present on both sides of the equal sign.
Tag Description
DATE DATE = MMDD where MM is the month number (01 to 12) and DD is the day number (01..31). TIME TIME = HHMM where HH is the hour number (00 to 23) and MM is the minute number (00 to
59).
NMBR NMBR = <number> or P or O where <number> is the telephone number of the caller, where P
indicates that the calling number information is not available since the originating caller has requested private service, and where O indicates that the calling number information is not
available or out of service at the calling location. NAME NAME = <listing name> where <listing name> is the subscription name. MESG MESG = <data tag> <length of message> <data> <checksum> in printable ASCII hex numbers.
This tag indicates a data item not listed above. The message is only possible for Multiple
Message Format.
Notes:
1. The modem does not present any Caller ID information if the DCE detects a checksum error in the Caller ID packet.
2. In the event of an unrecognized data tag, the modem will present the data in ASCII hex numbers following the MESG tag.
AT Command Reference Manual
Example of Formatted Form Reporting
1. The following example illustrates the standard Caller ID message packet.
RING DATE = 0321
TIME = 1405 NMBR = 5045551234 NAME = A N OTHER
RING RING
2. The following example illustrates the case where the tag of the packet is not recognized by the modem.
RING MESG = 060342424231 RING RING
Unformatted Form Reporting
The modem presents all information and packet control information found in the message. The modem, however, excludes the leading U's (channel seizure information) from the presentation. The packet is presented in ASCII printable hex numbers, the modem does not insert spaces, or line feeds, for formatting between bytes or words of the packet.
The modem does not detect the checksum of the packet.
Example of Unformatted Form Reporting
RING 0412303332323234303539313435353132333435 RING RING
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3.7 CELLULAR COMMANDS
The Direct Connect Modem 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 dialtone 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. Below is a block diagram of a typical Direct Connect Cellular Modem (based on AK14-X270 Rev 4 reference schematic).
3.7.1 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.
3.7.2 Cellular Commands ^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.
^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 1994, Spectrum Cellular, Inc. Version 0.07 Thu Jan 10:29:52 1994 OK or ERROR Cellular phone driver is not loaded
AT Command Reference Manual
^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.
3.7.3 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 DIALTONE Indicates that cellular service is not currently available. RING Indicates that the cellular phone is receiving an incoming call.
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 products 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 products 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.
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In V.34 modems 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. If an AXCELL™ solution is used, a transmit level of -10dBm is required, therefore the following init 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 3-2 summarizes the mode and resulting transmit levels for both modems depending on their configuration.
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.
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.
AT Command Reference Manual
Table 3-2. Remote Modem Configuration and Resulting Transmit Levels
Remote Modem
Configuration
AT&F-SEC=0,x AT&F-SEC=1,x
V.34 V.32bis V.34 V.32bis
V.34 Direct Connect
V.32bis Direct Connect
V.34 PSTN
V.32bis PSTN
Key:
Mod = Modulation negotiated (V.32bis or V.34) Mode = -EC = Both ends in MNP10-EC mode
RTxlv = Transmit level of Remote side modem in dBm BTxlv = Transmit level of Base side modem in dBm x = User defined transmit level Driver = Transmit level defined in cellular phone driver.
AT&F Mod = V.32bis
Mode = -EC RTxlv = Driver BTxlv = x
AT&F-SEC=1,x Mod = V.34
Mode = -EC RTxlv = x BTxlv = x
AT&F Mod = V.32bis
Mode = Single -EC RTxlv = Driver BTxlv = -10
AT&F-SEC=1,x Mod = V.32bis
Mode = Single -EC RTxlv = x BTxlv = -10
AT&F Mod = V.34
Mode = non -EC RTxlv = -10 BTxlv = -10
AT&F Mod = V.32bis
Mode = non -EC RTxlv = -10 BTxlv = -10
Single -EC = one end in MNP10-EC mode non -EC = neither end in MNP10-EC mode
Base Site Configuration
(Connected to PSTN)
Mod = V.32bis Mode = Single -EC RTxlv = Driver BTxlv = -10 Mod = V.32bis Mode = Single -EC RTxlv = x BTxlv = -10 Mod = V.32bis Mode = Single -EC RTxlv = Driver BTxlv = -10 Mod = V.32bis Mode = Single -EC RTxlv = x BTxlv = -10 Mod = V.32bis Mode = non -EC RTxlv = -10 BTxlv = -10 Mod = V.32bis Mode = non -EC RTxlv = -10 BTxlv = -10
Mod = V.32bis Mode = -EC RTxlv = Driver BTxlv = x Mod = V.34 Mode = -EC RTxlv = x BTxlv = x Mod = V.32bis Mode = -EC RTxlv = Driver BTxlv = x Mod = V.32bis Mode = -EC RTxlv = x BTxlv = x Mod = V.34 Mode = Single -EC RTxlv = -10 BTxlv = x Mod = V.32bis Mode = Single -EC RTxlv = -10 BTxlv = x
Mod = V.32bis Mode = -EC RTxlv = Driver BTxlv = x Mod = V.32bis Mode = -EC RTxlv = x BTxlv = x Mod = V.32bis Mode = -EC RTxlv = Driver BTxlv = x Mod = V.32bis Mode = -EC RTxlv = x BTxlv = x Mod = V.32bis Mode = Single -EC RTxlv = -10 BTxlv = x Mod = V.32bis Mode = Single -EC RTxlv = -10 BTxlv = x
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3.8 AT COMMAND RESULT CODES
The modem responds to commands from the DTE and to activity on the line by signalling to the DTE in the form of result codes. The result codes that the modem can send are described below.
Two forms of each result code are available: long-form, an English-like "verbose" response, and short-form, a data-like numeric response (included in parentheses following the long-form). The long-form code is preceded and terminated by the sequence < CR> < LF>. The short-form is terminated by < CR>, only with no preceding sequence.
If result messages are suppressed, nothing is returned to the DTE. The long-form results codes can be modified by the OEM through the ConfigurACE Configuration Utility Program. (See ConfigurACE description.)
OK (0)
The OK code is returned by the modem to acknowledge execution of a command line.
CONNECT (1)
The modem will send this result code upon connecting when:
1. The line speed is 300 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 300 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting, or
3. The range of result code responses is restricted by the X command such that no speed reporting is allowed.
RING (2)
The modem sends this result code when incoming ringing is detected on the line. What qualifies as a ring signal is determined by country-dependent parameters, modifiable through ConfigurACE.
When cellular interface is selected, RING indicates that the cellular phone is receiving an incoming call.
NO CARRIER (3)
The modem sends this result code when attempting to establish a call if:
1. Ringback is detected and later ceases but no carrier is detected within the period of time determined by register S7, or
2. No ringback is detected within the period of time determined by register S7. This result code is also used when the modem auto-disconnects due to loss of carrier. Under X0, if busy tone detection is enforced, this result code is used as a response to the detection of busy or circuit busy.
Under X0, if dial tone detection is enforced or selected, this result code is used to indicate that dial tone has not been detected.
ERROR (4)
The modem returns this result code if the command line contains a syntax error or it is unable to execute a command contained in the command line. It is issued if a command does not exist or if the parameter supplied is outside the permitted range.
Under X0, X1, X2, and X3, this result is used instead of DELAYED and BLACKLISTED.
CONNECT 1200 (5)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 1200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 1200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting. (Also, see the W command.)
NO DIALTONE (6)
For X2 and X4, the modem sends this result code if it has been instructed to wait for dial tone during dialing but none is received.
When cellular phone interface is selected, NO DIALTONE indicates that cellular service is not currently available. 3-42 1048
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BUSY (7)
For X3 and X4, if busy tone detection is enforced, the modem sends this result code when attempting to originate a call if the busy (engaged) signal is detected on the line.
NO ANSWER (8)
The modem sends this result code when attempting to originate a call if a continuous ringback signal is detected on the line until the expiration of the timer S7.
CONNECT 0600 (9)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 2400 (10)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 2400 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 2400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 4800 (11)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 4800 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 4800 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 9600 (12)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 9600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 9600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 7200 (13)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 7200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 7200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 12000 (14)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 12000 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 12000 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 14400 (15)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 14400 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2. The DTE speed is 14400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 19200 (16)
For X1, X2, X3, and X4, the modem sends this result code when:
1. The line speed is 19200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
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2. The DTE speed is 19200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 38400 (17)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 38400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 57600 (18)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 57600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 115200 (19)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 115200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 75TX/1200RX (22)
For X1, X2, X3, and X4, the modem returns this result code upon establishing a V.23 originate connection when the modem has been instructed to report the DCE speed upon connection.
CONNECT 1200TX/75RX (23)
For X1, X2, X3, and X4, the modem returns this result code upon establishing a V.23 answer connection when the modem has been instructed to report the DCE speed upon connection.
DELAYED (24)
For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'delayed' due to country blacklisting requirements.
BLACKLISTED (32)
For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'blacklisted'.
FAX (33)
The modem returns this result code when a fax modem connection is established in a facsimile mode.
DATA (35)
The modem returns this result code when a data modem connection is established in a facsimile mode.
CARRIER 300 (40)
The modem returns this result code when a 0-300 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 1200/75 (44)
The modem sends this result code when the V.23 backward channel carrier has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 75/1200 (45)
The modem sends this result code when the V.23 forward channel carrier has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 1200 (46)
The modem sends this result code when a 1200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 2400 (47)
The modem sends this result code when a 2400 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 4800 (48)
The modem sends this result code when a 4800 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
AT Command Reference Manual
CARRIER 7200 (49)
The modem sends this result code when a 7200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 9600 (50)
The modem sends this result code when a 9600 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 12000 (51)
The modem sends this result code when a 12000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 14400 (52)
The modem sends this result code when a 14400 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 16800 (53)
The modem sends this result code when a 16800 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 19200 (54)
The modem sends this result code when a 19200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 21600 (55)
The modem sends this result code when a 21600 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 24000 (56)
The modem sends this result code when a 24000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 26400 (57)
The modem sends this result code when a 26400 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 28800 (58)
The modem sends this result code when a 28800 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CONNECT 16800 (59)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 16800 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 21600 (61)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 21600 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 24000 (62)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 24000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 26400 (63)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 26400 bps and the modem has been instructed to report the DTE speed upon connecting.
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CONNECT 28800 (64)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 28800 bps and the modem has been instructed to report the DTE speed upon connecting.
COMPRESSION: CLASS 5 (66)
This message is sent to the DTE when the modem has connected in MNP Class 5 and COMPRESSION message reporting has been enabled. (See S95 and Xn.)
COMPRESSION: V.42 bis (67)
This message is sent to the DTE when the modem has connected in V.42 bis and COMPRESSION message reporting has been enabled. (See S95 and Xn.)
COMPRESSION: NONE (69)
This message is sent to the DTE when the modem has connected without data compression and COMPRESSION message reporting has been enabled. (See S95 and Xn.)
PROTOCOL: NONE (70)
This message is sent to the DTE when the modem has connected without any form of error correction, and the PROTOCOL message reporting has been enabled. (See S95 and Xn.)
PROTOCOL: LAPM (77)
This message is sent to the DTE when the modem has connected in the V.42 LAPM mode of error correction, and PROTOCOL message reporting has been enabled. (See S95 and Xn.)
CARRIER 31200 (78)
The modem sends this result code when a 31200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 33600 (79)
The modem sends this result code when a 33600 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
PROTOCOL: ALT (80)
This message is sent to the DTE when the modem has connected in the MNP mode of error correction, and PROTOCOL message reporting has been enabled. (See S95 and Xn.)
PROTOCOL: ALT-CELLULAR (81)
This message is sent to the DTE when the modem has connected in the MNP 10 mode and cellular power level adjustment is enabled (")M1 or )M2").(See S95 and Xn.)
CONNECT 33600 (84)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 33600 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 31200 (91)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 31200 bps and the modem has been instructed to report the DTE speed upon connecting.
CARRIER 32000 (150)
The modem sends this result code when a 32000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 34000 (151)
The modem sends this result code when a 34000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
AT Command Reference Manual
CARRIER 36000 (152)
The modem sends this result code when a 36000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 38000 (153)
The modem sends this result code when a 38000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 40000 (154)
The modem sends this result code when a 40000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 42000 (155)
The modem sends this result code when a 42000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 44000 (156)
The modem sends this result code when a 44000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 46000 (157)
The modem sends this result code when a 46000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 48000 (158)
The modem sends this result code when a 48000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 50000 (159)
The modem sends this result code when a 50000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 52000 (160)
The modem sends this result code when a 52000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 54000 (161)
The modem sends this result code when a 54000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CARRIER 56000 (162)
The modem sends this result code when a 56000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
CONNECT 32000 (165)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 32000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 34000 (166)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 34000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 36000 (167)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 36000 bps and the modem has been instructed to report the DTE speed upon connecting.
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CONNECT 38000 (168)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 38000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 40000 (169)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 40000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 42000 (170)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 42000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 44000 (171)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 44000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 46000 (172)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 46000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 48000 (173)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 48000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 50000 (174)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 50000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 52000 (175)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 52000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 54000 (176)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 54000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 56000 (177)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 56000 bps and the modem has been instructed to report the DTE speed upon connecting.
CONNECT 230400 (20)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 230400 bps and the modem has been instructed to report the DTE speed upon connecting.
+FCERROR (+F4)
This message is sent to the DTE when high speed fax data (V.27, V.29, V.33, or V.17) is expected and a V.21 signal is received.
AT Command Reference Manual
3.9 AUDIOSPAN AND DSVD COMMANDS
AudioSpan and DSVD are two technologies that allow simultaneous voice and data operation using a Rockwell modem connected to a telephone line. AudioSpan and DSVD implementations differ in the manner that voice and modem data are combined. Voice and data channels are combined in the analog domain for AudioSpan and in the digital domain for DSVD.
Establishing a AudioSpan or 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 AudioSpan or DSVD mode and back to phone conversation. A handset, headset, or microphone/speaker can be used for voice communication during AudioSpan or DSVD mode.
AudioSpan operates in normal (non-error corrected) or error-corrected/compression mode (MNP 5 or V.42 bis depending on the error correction settings of the modems). The DTE rate must be equal to or greater than the anticipated DCE connection speed. In general, DTE speed of 38400 bps or higher should be used.
3.9.1 Commands Supported by Both AudioSpan and DSVD
-SMS= x, y, z, t - Select AudioSpan/DSVD Mode
The x parameter selects Data, AudioSpan, or DSVD mode, or enables automatic mode selection. The y, z, t parameters are optional and are required only if the user wishes to control connection speeds. For example, AT-SMS=2 is sufficient to enable SVD.
x
: AudioSpan/DSVD/Data mode select and automatic mode select enable
0 = Data mode 1 = DSVD mode (A modem not supporting DSVD will respond with ERROR) 2 = AudioSpan mode (A modem not supporting AudioSpan will respond with ERROR) 3 = Automatic mode select (DSVD/AudioSpan/Data) (Default)
Note:
AT-SMS=1 performs the same operation at AT-SSE=1.
y
: Minimum data speed (bps) with audio for AudioSpan mode (see y value in following table)
z
: Maximum data speed (bps) with audio for AudioSpan mode (see z value in following table)
Modulation Selected (See -SQS Command)
y or z Value V.61 ML144 ML288
4800 S ( y and z Default) S (y Default) S (y Default) 7200 — S S
9600 — S (z Default) S 12000 — — S 14400 — — S (z Default)
S = Supported. — = Not supported.
t
: Symbol rate (ML288 modulation only)
0 = Auto Selection (Default) 1 - 6 = Reserved
The symbol rate must be set to 0 for for normal operation (default). The other symbol rate selections are for test purposes only.
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Notes
AudioSpan audio quality is dependent upon modulation mode, data rate and telephone line quality. Some guidelines are:
1. Higher quality telephone lines provide better audio quality than impaired telephone lines.
2. A lower data speed with audio provides better audio quality than higher data speed with audio. For example, a ML288/9600 connection will be audibly superior to a ML288/14400 connection.
3. For identical data speed with audio using different modulations (e.g., ML144 vs. ML288), the audio quality at ML288 will be superior. For example, a ML288/9600 will be audibly superior to a ML144/9600 connection.
Examples
1. AT -SMS=2 selects AudioSpan Mode (the y, z, and t parameters are not required).
2. AT -SMS=2,4800,9600 selects AudioSpan Mode, specifies the minimum data speed with audio of 4800 bps, and specifies the maximum data speed with audio of 9600 bps.
Reporting Selected Options
The modem reports the selected options in response to the following command:
-SMS?
The response is:
<x>, <y> <z>,< t>
Example:
-SMS? 2,1
Reporting Supported Options
The modem reports the supported options in response to the following command:
-SMS=?
The response is:
(list of<x> values),(list of <y > values),(list of <z > values),(list of <t > values)
Example:
-SMS=? (0,1,2,3),(4800-14400),(4800-14400),(0,1,2,3,4,5,6)
#VLS = x - Voice Line Select
0 = Telephone handset (Default) 5 = Headset 6 = Speakerphone
The AT#VLS setting must be issued prior to establishing a DSVD or AudioSpan connection if a voice line other than the default telephone handset is desired.
3.9.2 Commands Supported Only by DSVD
-SSE= x - Enable/Disable DSVD
0 = Disable DSVD (Default) 1 = Enable DSVD (A modem not supporting DSVD will respond with ERROR)
Note:
DSVD mode can be enabled by either AT-SSE=1 or AT-SMS=1, and disabled by either AT-SSE=0 or AT-SMS=0.
AT Command Reference Manual
3.9.3 Commands Supported Only by AudioSpan
The following commands are applicable only for modems supporting AudioSpan mode. The command has no effect in DSVD mode. Modems that supports DSVD but not AudioSpan will report ERROR in response to these commands.
-SQS= x, y - Select AudioSpan Modulation
x
: Select modulation mode
0 = V.61 1 = ML144 (Default for RCV144) 2 = ML288 (Default for RCV288)
y
: Enable/disable AudioSpan automatic modulation (automode) selection (V.61, ML144, ML288)
0 = Disable AudioSpan automodulation Host selects AudioSpan modulation specified by the x parameter.
If the selected modulation is not supported by the modem, ERROR is reported and the x parameter is not changed. If the remote modem does not support the selected modulation, the modem disconnects.
1 = Enable AudioSpan automodulation The modem starts with the AudioSpan modulation specified by the
x parameter and falls back from ML288, to ML144, to V.61, or to data mode (e.g., V.34 or v.32 bis) depending on the selected x parameter, the remote modem capability, and line conditions. (Default.)
Notes
1. The AT-SQS parameters should remain at default unless a particular modulation is preferred.
2. For identical data speed with audio using different modulations (e.g., ML144 vs. ML288), the audio quality at ML288 will be superior. For example, a ML288/9600 will be audibly superior to a ML144/9600 connection.
Examples
1. AT -SQS=2,1 enables AudioSpan automodulation starting with ML288 modulation.
2. AT -SQS=2,0 disables AudioSpan automodulation and selects ML288 modulation.
3. AT -SQS=1,0 disables AudioSpan automodulation and selects ML144 modulation.
Reporting Selected Options
The modem reports the selected options in response to the following command:
-SQS?
The response is:
<x>, <y>
Example:
-SQS? 2,1
Reporting Supported Options
The modem reports the supported options in response to the following command:
-SQS=?
The response is:
(list of<x> values), (list of <y > values)
Example:
-SQS=?
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(0,1,2),(0,1)
-SMC= x - Enable/Disable ML144 Data Burst
0 = Disable data burst 1 = Enable data burst (Default)
ML144 data burst can be enabled using the -SMC command in ML144 modulation. Data burst will keep the audio channel open only when energy is detected on the handset or headset. When silence is detected in data burst mode, the connected modems will upshift in speed for higher throughput. Disabling data burst mode will keep the audio channel open at all times during the AudioSpan connection.
Reporting Selected Options
The modem reports the selected options in response to the following command:
-SMC?
The response is:
<x>
Example:
-SMC? 1
Reporting Supported Options
The modem reports the supported options in response to the following command:
-SMC=?
The response is:
(list of<x> values)
Example:
-SMC=? (0,1)
AT Command Reference Manual
3.9.4 Examples
Example 1:
Both DTEs are set at 57600 bps:
AT&F AT&F Reset modems.
AT-SMS=2 AT-SMS=2 Enable AudioSpan with default
ATDTxxxx Originate modem dials remote
<data> <data> Modems exchange data.
+++ Originate modem enters
ATH
Establish a AudioSpan data connection between two RCV288 modems and use handset as audio interface.
Originate Modem Answer Modem
DTE DCE DTE DCE Comments
OK OK
settings.
OK OK
modem.
RING
ATA Answer DTE responds to RING
by answering.
CONNECT 57600 CONNECT 57600 AudioSpan is established and
users can pick up handsets to converse. The connect message represents the DTE speed on each side.
Users hang up handsets to terminate audio link.
command mode to prepare for disconnect.
OK
NO CARRIER NO CARRIER Modems disconnect.
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Example 2:
originate DTE is set to 57600 bps and the answer DTE is set to 115200 bps:
AT&F AT&F Reset modems.
AT-SMS=2 AT-SMS=2 Enable AudioSpan with default
ATD Originate modem initiates data
<data> <data> Modems exchange data.
Note:
during the negotiation period.
Switch from normal handset conversation to AudioSpan data connection between two RCV288 modems. The
Originate Modem Answer Modem
DTE DCE DTE DCE Comments
Users establish handset conversation and both handsets are off-hook.
OK OK
settings. Modems are aware handsets are already being used due to line current sensing.
OK OK
negotiation but will not actually dial since the handset is already offhook.
RING Answer modem detects
negotiation sequence and reports RING message to DTE.
ATA DTE responds to RING by
answering.
CONNECT 57600 CONNECT 115200 AudioSpan is established and
user’s can resume conversation. The connect message represents the DTE speed on each side.
+++ Answer modem enters command
mode to prepare for disconnect.
OK
ATH
NO CARRIER NO CARRIER Modems disconnect in AudioSpan
mode but handsets are still offhook and conversation can continue. Conversation is terminated when both handsets are hung up.
The transition from handset conversation to AudioSpan mode can take up to 8 seconds. The handsets will be silenced
AT Command Reference Manual
Example 3:
normal (non-error corrected) mode. Headset operation will be selected on the originate modem and speakerphone operation will be selected on the answer modem as the audio interface during AudioSpan connection. The originate DTE prefers a ML288/14400 connection for good audio quality and does not require high throughput. Both DTEs are set at 57600 bps:
AT&F\N0 AT&F Reset modems. Normal mode
AT#VLS=5 AT#VLS=6 Handset mode selected for
AT-SMS= 2, 14400 ,14400
ATD Originate modem initiates data
<data> <data> Modems exchange data.
Note:
during the negotiation period.
Switch from normal handset conversation to AudioSpan data connection between two RCV288 modems in
Originate Modem Answer Modem
DTE DCE DTE DCE Comments
User’s establish handset conversation and both handsets are off-hook.
operation is selected by originate DTE.
OK OK
originate mode. Speakerphone mode selected for answer modem.
OK OK
AT-SMS=2 Enable AudioSpan. Originate DTE
wishes to force a ML288/14400 with audio connection.
OK OK
negotiation but will not actually dial since the handset is already offhook.
RING Answer modem detects
negotiation sequence and reports RING message to DTE.
ATA DTE responds to RING by
answering.
CONNECT 57600 CONNECT 57600 AudioSpan is established and
user’s can resume conversation. The connect message represents the DTE speed on each side.
+++ Answer modem enters command
mode to prepare for disconnect.
OK
ATH
NO CARRIER NO CARRIER Modems disconnect in AudioSpan
mode but handsets are still offhook and conversation can continue. Conversation is terminated when both handsets are hung up.
The transition from handset conversation to AudioSpan mode can take up to 8 seconds. The handsets will be silenced
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Example 4:
handset later in the session so conversation can continue after modem call is hung up. This may be typical for configuring an interactive gaming software. Both DTEs are set at 38400 bps:
AT&F AT&F Reset modems.
AT-SQS=1 Select ML144 AudioSpan
AT-SMS=2, 7200,7200
AT#VLS=5 AT#VLS=5
ATDTxxxx Originate modem dials remote
<data> <data> Send data betweeen modems.
+++ Originate modem enters
ATH
Establish a ML144/7200 data connection between two RCV288 modems in headset mode, then switch to
Originate Modem Answer Modem
DTE DCE DTE DCE Comments
OK OK
modulation.
OK
AT-SMS=2, 7200,7200
OK OK
OK OK
RING
ATA DTE responds to RING by
CONNECT 38400 CONNECT 38400 AudioSpan is established and
OK
NO CARRIER NO CARRIER Modems disconnect in AudioSpan
Enable AudioSpan with both DTEs choosing ML144/7200 with audio as the connection.
modem.
answering.
headsets are used for conversation.
Users can pick up handsets to automatically swtich to handset modes during AudioSpan. A conversation can continue even if one user picks up the handset. In this example, both users will pick up the handset.
command mode to prepare for disconnect.
mode but handsets are still offhook and conversation can continue. Conversation is terminated when both handsets are hung up.
AT Command Reference Manual
Example 5:
originate modem switches from speakerphone mode to establish a AudioSpan/Speakerphone data connection between two RCV288 modems. The originate DTE is set to 57600 bps and the answer DTE is set to 115200 bps:
AT&F#CLS=8 #VLS=6#VRN=0
ATDT5551212 RING Answer modem is called but user
AT#CLS=0 Originate modem switches to data
AT-SMS=2 #VLS=6
ATD Originate modem initiates data
<data> <data> Modems exchange data.
ATH
Note:
during the negotiation period.
Originate modem places speakerphone call to remote handset which is connected to the answer modem. The
Originate Modem Answer Modem
DTE DCE DTE DCE Comments
AT&F-SMS=2 #VLS=6
OK OK
VCON
OK
OK
RING Answer modem detects
ATA DTE responds to RING by
CONNECT 57600 CONNECT 115200 AudioSpan is established and
+++ Answer modem enters command
OK
NO CARRIER NO CARRIER Modems disconnect in AudioSpan
The transition from handset conversation to AudioSpan mode can take up to 8 seconds. The handsets will be silenced
Modems are reset. Originate modem is configured for speakerphone call. Answer modem is configured for AudioSpan speakerphone call.
picks up handset to establish conversation.
mode. Audio on both sides will be muted while the originate modem is in #CLS=0.
Modem is configured for AudioSpan with speakerphone mode selected.
negotiation but will not actually dial since the handset is already offhook.
negotiation sequence and reports RING message to DTE.
answering.
users can resume conversation on speakerphone. The connect message represents the DTE speed on each side.
mode to prepare for disconnect.
mode and speakerphone conversation is terminated.
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3.10 SYNCHRONOUS ACCESS MODE
3.10.1 Synchronous Access Mode Commands
Three commands support Synchronous Access Mode:
+ES Enables and disables Synchronous Access Mode in the client or central site modem +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
Synchronous Data Modes for Asynchronous DTE).
+ES - Enable Synchronous Access Mode
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. The command format is:
+ES=[<orig_rqst>[,<orig_fbk>[,<ans_fbk>]]]
This extended-format compound parameter is used to control the manner of operation of the V.42 protocol in the modem (if present). It accepts three numeric subparameters:
V.80 (DATA COMMUNICATION OVER THE TELEPHONE NETWORK; In-Band DCE Control and
Examples:
<orig_rqst>
<orig_fbk>
<ans_fbk>
+ES=6 Enable Synchronous Access Mode originator (client modem only) +ES=,,8 Enable Synchronous Access Mode answerer (client modem only) +ES=6,,8 Enable Synchronous Access Mode originator and answerer (client modem only) +ES=7 Enable Frame Tunneling Mode originator (central site modem only) +ES=,,9 Enable Frame Tunneling Mode answerer (central site modem only) +ES=7,,9 Enable Frame Tunneling Mode originator and answerer (central site modem only) +ES=3 Disable Synchronous Access Mode originator +ES=,,2 Disable Synchronous Access Mode answerer +ES=3,,2 Disable Synchronous Access Mode originator and answerer
Specifies the initial requested mode of operation when the modem is operating as the originator. The options are:
3 Initiate V.42 with Detection Phase. (Default.) 6 Initiate Synchronous Access Mode when connection is completed, and Data State is
entered.
7 Initiate Frame Tunneling Mode when connection is completed, and Data State is entered.
Specifies the acceptable fallback mode of operation when the modem is operating as the originator. This subparameter should not be commanded.
Specifies the acceptable fallback mode of operation when the modem is operating as the answerer. The options are:
2 Error control optional (either LAPM or Alternative acceptable); if error control not
established, maintain DTE-modem data rate and use local buffering and flow control during non-error-control operation. (Default.)
8 Initiate Synchronous Access Mode when connection is completed, and Data State is
entered.
9 Initiate Frame Tunneling Mode when connection is completed, and Data State is entered.
AT Command Reference Manual
Reporting Selected Options
The modem reports the selected options in response to the following command:
+ES?
The response is:
+ES: <orig_rqst>,<orig_fbk>,<ans_fbk>
Example:
+ES? +ES: 3,0,2 For the defaults. +ES: 6,0,8 Synchronous Access Mode originator and answerer enabled (client modem only) +ES: 7,0,9 Frame Tunneling Mode originator and answerer enabled (central site modem only)
Reporting Supported Options
The modem reports the supported options in response to the following command:
+ES=?
The response is:
+ES: (list of supported <orig_rqst> values),(list of supported <orig_fbk> values),(list of supported <ans_fbk> values)
For example:
+ES=? +ES: (0-7),(0-4),(0-9)
+ESA - Configure Synchronous Access Submode
The operation of the Synchronous Access sub-Mode is configured by the +ESA parameter. The command format is:
+ESA=[<trans_idle>[,<framed_idle>[,<framed_un_ov>[,<hd_auto>[,<crc_type>[,<nrzi_en>[,<syn1>[,<syn2>]]]]]]]]
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:
<trans_idle>
<framed_idle>
<framed_un_ov>
<hd_auto>
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).
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).
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.
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.
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<crc_type>
<nrzi_en>
syn1>, <syn2>
<
Specifies if Non Return to Zero Inverted (NRZI) encoding is to be used by the modem for
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.
transmit and receive data. The options are:
0 NZRI encoding and decoding disabled (default and fixed).
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.
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),
AT Command Reference Manual
+ ITF - Transmit Flow Control Thresholds
The +ITF command determines the flow control thresholds used by the modem for transmit data from the DTE. The command format is:
+ITF=[<off>[,<on>[,<report_period>]]]
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 threshholds 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. Note that the DTE can adjust its own threshholds for flow control of data on circuit 104 (received data) from the modem.
<off>
<on>
<report_period>
Determines the threshhold, 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.
Determines the threshhold, 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.
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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AT Command Reference Manual
4. S-REGISTERS
The S-Registers are summarized in Table 4-1 along with their default values; registers denoted with an '*' may be stored in one of the two user profiles by entering the &Wn command. One of these profiles may be loaded at any time by using the Zn 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-Register should be used to change the value.
4.1 FACTORY DEFAULTS
The factory default values are stored in ROM and are loaded into the active configuration at power up or by the ATZn 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 &Yn command where n is one of the two possible user profiles.
The defaults shown are those used by Rockwell 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 4-1 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 4-1. S-Register 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 for Dial Tone 2-255 s * 2 S7 Wait Time for Carrier 1-255 s * 50 S8 Pause Time for Dial Delay Modifier 0-255 s * 2 S9 Carrier Detect Response Time 1-255 0.1 s * 6 S10 Carrier Loss Disconnect Time 1-255 0.1 s * 14 S11 DTMF Tone Duration 50-255 0.001 s * 95 S12 Escape Prompt Delay 0-255 0.02 s * 50 S13 Reserved - - ­S14 General Bit Mapped Options Status - - * 138 (8Ah) S15 Reserved - - ­S16 Test Mode Bit Mapped Options
Status (&T) S17 Reserved - - ­S18 Test Timer 0-255 s * 0 S19 AutoSync Options - - 0 S20 AutoSync HDLC Address or BSC
Sync Character S21 V.24/General Bit Mapped Options
Status S22 Speaker/Results Bit Mapped Options
Status S23 General Bit Mapped Options Status - * 62 (3Dh) 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 - - * 194 (C2h) S32 XON Character 0-255 ASCII 17 (11h) S33 XOFF Character 0-255 ASCII 19 (13h) S34-S35 Reserved - - ­S36 LAPM Failure Control - - * 7 S37 Line Connection Speed - - * 0 S38 Delay Before Forced Hangup 0-255 s 20 S39 Flow Control Bit Mapped Options
Status
-- 0
0-255 - * 0
- - * 52 (34h)
- - * 117 (75h)
--*3
AT Command Reference Manual
Table 4-1. S-Register Summary (Cont’d)
Register Function Range Units Saved Default**
S40 General Bit-Mapped Options Status - - * 104 (68h) S41 General Bit-Mapped Options Status - - * 195 (C3h) S42-S45 Reserved - - ­S46 Data Compression Control - - * 138 S48 V.42 Negotiation Control - - * 7 S82 LAPM Break Control - - 128(40h) S86 Call Failure Reason Code 0-255 - ­S91 PSTN Transmit Attenuation Level 0-15 dBm 10 (Country dependent) S92 Fax Transmit Attenuation Level 0-15 dBm 10 (Country dependent) S95 Result Code Messages Control - - * 0 * 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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4.2 S-REGISTER DEFINITIONS
S0 - Number of Rings to Auto-Answer
Sets the number of the rings required before the modem automatically answers a call. Setting this register to zero disables auto-answer mode.
Range: 0-255 rings Default: 0
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
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 (+)
S3 - Carriage Return Character
Sets the command line and result code terminator character. Pertains to asynchronous operation only.
Range: 0-127, ASCII decimal Default: 13 (Carriage Return)
S4 - Line Feed Character
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)
S5 - Backspace Character
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)
AT Command Reference Manual
S6 - Wait Time for Dial Tone Before Blind Dialing, or After “W” Dial Modifier (W-Class Models)
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.
2. For W-class models, S6 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.
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
S7 - Wait Time For Carrier After Dial, For Silence, or For Dial Tone After “W” Dial Modifier (US Models)
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. For US models, S7 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.
Range: 1-255 seconds Default: 50
S8 - Pause Time For Dial Delay
Sets the time, in seconds, that the modem must pause when the “,” dial modifier is encountered in the dial string.
Range: 0-255 seconds Default: 2
S9 - Carrier Detect Response Time
Sets the time, in tenths of a second, that the carrier must be present before the modem considers it valid and turns on RLSD. As this time is increased, there is less chance to detect a false carrier due to noise from the telephone line.
Range: 1-255 tenths of a second Default: 6 (0.6 second)
S10 - Lost Carrier To Hang Up Delay
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)
S11 - DTMF Tone Duration
Sets the duration of tones in DTMF dialing (US models only). This value has no effect on pulse dialing. For W-class models, this parameter is a country parameter loaded by ConfigurACE.
Range: 50-255 milliseconds Default: 95 (95 milliseconds)
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S12 - Escape Prompt Delay (EPD)
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. Note that 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)
S13 - Reserved S14 - General Bit Mapped Options Status
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)
Bit 4 Reserved Bit 5 Tone (T)/Pulse (P)
Bit 6 Reserved Bit 7 Originate/Answer
S15 - Reserved
0 = Numeric (V0) 1 = Verbose (V1) (Default.)
0 = Tone (T) (Default.) 1 = Pulse (P)
0 = Answer 1 = Originate (Default.)
AT Command Reference Manual
S16 - General Bit Mapped Test Options Status
Indicates the test in progress status.
Default: 0
Bit 0 Local analog loopback
0 = Disabled (Default.) 1 = Enabled (&T1)
Bit 1 Not used Bit 2 Local digital loopback
0 = Disabled (Default.) 1 = Enabled (&T3)
Bit 3 Remote digital loopback (RDL) status
0 = Modem not in RDL (Default.) 1 = RDL in progress
Bit 4 RDL requested (AT&T6)
0 = RDL not requested (Default.) 1 = RDL requested (&T6)
Bit 5 RDL with self test
0 = Disabled (Default.) 1 = Enabled (&T7)
Bit 6 Local analog loopback (LAL) with self test
0 = Disabled (Default.) 1 = Enabled (&T8)
Bit 7 Not used
S17 - Reserved S18 - Test Timer
Sets the length of time, in seconds, that the modem conducts a test (commanded by &Tn) before returning to the command mode. If this register value is zero, the test will not automatically terminate; the test must be terminated from the command mode by issuing an &T0 or H command. When S18 is non-zero, the modem returns the OK message upon test termination.
Range: 0-255 seconds Default: 0
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S19 - AutoSync Bit Mapped Options
Defines the options for AutoSync operation (see &Q4 command). S19 must be set to the desired value before &Q4 is issued.
Default: 0
Bit 0 Reserved Bit 1 BSC/HDLC format select
0 = BSC selected (Default.) 1 = HDLC selected
Bit 2 Address detection enable/disable
0 = Disabled (Default.) 1 = Enabled
Bit 3 NRZI/NZI coding select
0 = NRZI (Default.) 1 = NZI
Bit 4 Idle indicator select
0 = Mark idle (Default.) 1 = Flag or sync idle
Bits 5 - 7 Reserved
S20 - AutoSync HDLC Address or BSC Sync Character
Defines the HDLC address (S19 bit 1 = 1) or BSC Sync Character (S19 bit 1 = 0) for AutoSync operation (see &Q4 command). S20 must be set to the desired value before &Q4 is issued.
Range: 0-255 Default: 0
AT Command Reference Manual
S21 - V.24/General Bit Mapped Options Status
Indicates the status of command options.
Default: 52 (34h) (00110100b)
Bit 0 Set by &Jn command but ignored otherwise.
0 = &J0 (Default.) 1 = &J1
Bit 1 Reserved 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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S22 - Speaker/Results Bit Mapped Options Status
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
AT Command Reference Manual
S23 - General Bit Mapped Options Status
Indicates the status of command options.
Default: 62 (3Dh) (00111110b)
Bit 0 Grant RDL
0 = RDL not allowed (&T5) (Default.) 1 = RDL allowed (&T4)
Bits 1-3 DTE Rate
0 = 0 - 300 bps 1 = 600 bps 2 = 1200 bps 3 = 2400 bps 4 = 4800 bps 5 = 9600 bps 6 = 19200 bps 7 = 38400 bps or higher (Default.)
Bits 4-5 Assumed DTE parity
0 = even 1 = not used 2 = odd 3 = none (Default.)
Bits 6-7 Guard tone (&Gn)
0 = None (&G0) (Default.) 1 = None (&G1) 2 = 1800 Hz (&G2)
S24 - Sleep Inactivity Timer
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
S25 - Delay To DTR
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
S26 - RTS to CTS Delay
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
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S27 - Bit Mapped Options Status
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 100=&Q4 1 0 1 = &Q5 (Default.) 110=&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)
AT Command Reference Manual
Bit 7 - Reserved
0 = CCITT mode (B0) 1 = Bell mode (B1) (Default.)
AT Command Reference Manual
S28 - 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
S29 - Flash Dial Modifier Time
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. The time can be limited as it is a country dependent parameter.
Range: 0-255 10 ms intervals Default: 70 (700 ms)
S30 - Disconnect Inactivity Timer
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)
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S31 - Bit Mapped Options Status
Default: 194 (C2h) (11000010b)
Bit 0 Single line connect message enable/disable (\Vn)
Bit 1 Auto line speed detection (Nn)
Bits 2-3 Error correction progress messages (Wn)
Bits 4-5 Caller ID (#CID)
Bits 6-7 Reserved (Default = 11b)
AT Command Reference Manual
0 = Messages controlled by S95, Wn and Vn (\V0) (Default) 1 = Single line connect message (\V1)
0 = Disabled (N0) 1 = Enabled (N1) (Default.)
0 = DTE speed only (W0) (Default) 1 = Full reporting (W1) 2 = DCE speed only (W2)
0 = Caller ID disabled (#CID=0) (Default) 1 = Short (formatted) Caller ID enabled (#CID=1) 2 = Long (unformatted) Caller ID enabled (#CID=2)
S32 - XON Character
Sets the value of the XON character.
Range: 0-255, ASCII decimal Default: 17 (11h)
S33 - XOFF Character
Sets the value of the XOFF character.
Range: 0-255, ASCII decimal Default: 19 (13h)
S34-S35 - Reserved
S36 - LAPM Failure Control
Default: 7 (00000111b)
Bits 0-2 This value indicates what should happen upon a LAPM failure. These fallback options are
Bits 3-7 Reserved
AT Command Reference Manual
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
established. 6 = Reserved. 7 = An MNP connection is attempted and if it fails, a Normal mode connection is
established. (Default.)
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S37 - Desired Line Connection Speed
This register specifies the desired line connection speed.
Notes:
1. When the Nn command is issued or the S37 register value is modified, the +MS command subparameters are updated to reflect the speed and modulation specified by the S37 value (see +MS command). For example:
If N0 command is active, S37=10 updates the +MS command subparameters to reflect +MS=10,1,300,12000 If N1 command is active, S37=10 updates the +MS command subparameters to reflect +MS=10,0,12000,12000
2. S37 is not updated by the +MS command.
3. Use of the +MS command is recommended instead of the Nn and S37=x commands. Nn and S37=x commands are supported for compatibility with existing communication software.
Default: 0
Bits 0-4 Desired line connection speed. This is interlinked with the Fn command (RC144). If an invalid
number is entered, the number is accepted into the register, but S37 will act as if the default value has been entered.
0 = Attempt automode connection. If N0 is active, connection is attempted at the most
recently sensed DTE speed (+MS command settings are updated to the appropriate values). If N1 is active, connection is attempted at the highest possible speed (+MS settings are updated to 11,1,300,2880 to reflect V.34,
automode, 300 bps minimum speed, and 28800 bps maximum speed). (Default.) 1-3 = Attempt to connect at 300 bps. F1 command (RC144). 4 = Reserved. 5 = Attempt to connect at V.22 1200 bps. F4 command (RC144). 6 = Attempt to connect at V.22 bis 2400 bps. F5 command (RC144). 7 = Attempt to connect at V.23. 8 = Attempt to connect at V.32 bis/V.32 4800 bps. F6 command (RC144). 9 = Attempt to connect at V.32 bis/V.32 9600 bps. F8 command (RC144). 10 = Attempt to connect at V.32 bis 12000 bps. F9 command (RC144). 11 = Attempt to connect at V.32 bis 14400 bps. F10 command (RC144). 12 = Attempt to connect at V.32 bis 7200 bps. F7 command (RC144).
Bits 5-7 Reserved
AT Command Reference Manual
S38 - Delay Before Forced Hang Up
This register 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 register 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
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
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S40 - General Bit Mapped Options Status
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 MNP block size (\An)
0 = 64 chars (\A0) 1 = 128 chars (\A1) (Default.) 2 = 192 chars (\A2) 3 = 256 chars (\A3)
AT Command Reference Manual
S41 - General Bit Mapped Options Status
Indicates the status of command options.
Default: 195 (C3h) (11000011b)
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
S46 - Data Compression Control
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.)
S48 - V.42 Negotiation Action
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-Register, 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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S82 - Break Handling Options
S82 is for compatibility purposes only, changing this register will not have any affect.
S86 - Call Failure Reason Code
When the modem issues a NO CARRIER result code, a value is written to this S-Register to help determine the reason for the failed connection. S86 records the first event that contributes to a NO CARRIER message. The cause codes are:
Range: 0, 4, 5, 9, 12, 13, or 14 Default:
S86=0 Normal disconnect, no error occurred. S86=4 Loss of carrier. S86=5 V.42 negotiation failed to detect an error-correction modem at the other end. S86=9 The modems could not find a common protocol. S86=12 Normal disconnect initiated by the remote modem. S86=13 Remote modem does not respond after 10 re-transmissions of the same message. S86=14 Protocol violation.
S91 - PSTN Transmit Attenuation Level
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.)
S92 - Fax Transmit Attenuation Level
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.)
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