Siemens MC35 User Manual
AT Command Set
Siemens Cellular Engines
MC35 Module
MC35 Terminal
Version: 03.02
DocID: MC35_ATC_01_V03.02
AT Command Set
Document Name: AT Command Set
Siemens Cellular Engines
Version: 03.02
Date: 13.03.2002
Doc Id: MC35_ATC_01_V03.02
Status: Released
General note
With respect to any damages arising in connection with the described product or this document,
Siemens shall be liable according to the General Conditions on which the delivery of the described
product and this document are based.
This product is not intended for use in life support appliances, devices or systems where a malfunction
of the product can reasonably be expected to result in personal injury. Siemens AG customers using
or selling this product for use in such applications do so at their own risk and agree to fully indemnify
Siemens for any damages resulting from illegal use or resale.
Applications incorporating the described product must be designed to be in accordance with the technical specifications provided in these guidelines. Failure to comply with any of the required procedures
can result in malfunctions or serious discrepancies in results.
Furthermore, all safety instructions regarding the use of mobile technical systems, including GSM
products, which also apply to cellular phones must be followed.
Handheld applications such as mobile phones or PDAs incorporating the described product must be in
accordance with the guidelines for human exposure to radio frequency energy. The Specific Absorption Rate (SAR) of the application must be evaluated and approved to be compliant with national and
international safety standards or directives.
Subject to change without notice at any time.
Copyright
Copying of this document and giving it to others and the use or communication of the contents thereof,
are forbidden without express authority. Offenders are liable to the payment of damages. All rights reserved in the event of grant of a patent or the registration of a utility model or design.
Copyright © Siemens AG 2002
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AT Command Set
Contents
0 Version History............................................................................................. 8
1 Introduction .................................................................................................. 9
1.1 Scope of the document ............................................................................................................ 9
1.2 Supported product versions and related documents.............................................................. 10
1.3 Conventions............................................................................................................................ 11
1.4 Supported character sets ....................................................................................................... 11
1.5 AT command syntax............................................................................................................... 11
1.5.1 Using parameters ................................................................................................................... 12
1.5.2 Combining AT commands on the same command line.......................................................... 12
1.5.3 Entering successive AT commands on separate lines........................................................... 12
2 Standard V.25ter AT Commands .............................................................. 13
2.1 A/ Repeat previous command line ........................................................................................ 13
2.2 +++ Switch from data mode to command mode ...................................................................13
2.3 AT\Qn Flowcontrol................................................................................................................. 14
2.4 ATA Answer a call ................................................................................................................. 14
2.5 ATD Mobile originated call to dial a number ......................................................................... 15
2.6 ATD><mem><n> Originate call to phone number <n> in memory <mem>.......................... 16
2.7 ATD><n> Originate call to phone number selected from active memory ............................. 18
2.8 ATD><str> Originate call to phone number in memory with corresponding field.................. 19
2.9 ATDI Mobile originated call to dialable ISDN number <n>.................................................... 20
2.10 ATDL Redial last telephone number used ............................................................................ 21
2.11 ATE Enable command echo.................................................................................................. 22
2.12 ATH Disconnect existing connection..................................................................................... 22
2.13 ATI Display product identification information ....................................................................... 23
2.14 ATI[value] Display additional identification information ......................................................... 23
2.15 ATL Set monitor speaker loudness ....................................................................................... 24
2.16 ATM Set monitor speaker mode............................................................................................ 24
2.17 ATO Switch from command mode to data mode .................................................................. 24
2.18 ATQ Set result code presentation mode ............................................................................... 25
2.19 ATP Select pulse dialling....................................................................................................... 25
2.20 ATS0 Set number of rings before automatically answering the call...................................... 25
2.21 ATS3 Write command line termination character.................................................................. 26
2.22 ATS4 Set response formatting character .............................................................................. 26
2.23 ATS5 Write command line editing character......................................................................... 26
2.24 ATS6 Set pause before blind dialling ....................................................................................27
2.25 ATS7 Set number of seconds to wait for connection completion.......................................... 27
2.26 ATS8 Set number of seconds to wait for comma dial modifier ............................................. 27
2.27 ATS10 Set disconnect delay after indicating the absence of data carrier............................. 28
2.28 ATS18 Extended error report ................................................................................................28
2.29 ATT Select tone dialling......................................................................................................... 28
2.30 ATV Set result code format mode .........................................................................................29
2.31 ATX Set CONNECT result code format and call monitoring ................................................. 29
2.32 ATZ Set all current parameters to user defined profile ......................................................... 30
2.33 AT&C Set circuit Data Carrier Detect (DCD) function mode ................................................. 30
2.34 AT&D Set circuit Data Terminal Ready (DTR) function mode .............................................. 31
2.35 AT&F Set all current parameters to manufacturer defaults................................................... 31
2.36 AT&S Set circuit Data Set Ready (DSR) function mode....................................................... 32
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2.37 AT&V Display current configuration ...................................................................................... 33
2.38 AT&W Store current configuration to user defined profile..................................................... 34
2.39 AT+GCAP Request complete TA capabilities list.................................................................. 35
2.40 AT+GMI Request manufacturer identification ....................................................................... 35
2.41 AT+GMM Request TA model identification ........................................................................... 35
2.42 AT+GMR Request TA revision identification of software status ........................................... 36
2.43 AT+GSN Request TA serial number identification(IMEI) ...................................................... 36
2.44 AT+ILRR Set TE-TA local rate reporting ................................................................................ 37
2.45 AT+IPR Set fixed local rate .................................................................................................... 38
2.45.1 Autobauding ........................................................................................................................... 39
3 AT Commands for FAX.............................................................................. 40
3.1 AT+FBADLIN Bad Line Treshold .......................................................................................... 40
3.2 AT+FBADMUL Error Threshold Multiplier ............................................................................. 41
3.3 AT+FBOR Query data bit order............................................................................................. 41
3.4 AT+FCIG Query or set the Local polling id ........................................................................... 42
3.5 AT+FCLASS Fax: Select, read or test service class............................................................. 42
3.6 AT+FCQ Copy Quality Checking........................................................................................... 43
3.7 AT+FCR Capability to receive............................................................................................... 43
3.8 AT+FDCC Query or set capabilities ...................................................................................... 44
3.9 AT+FDFFC Data Compression Format Conversion ............................................................. 45
3.10 AT+FDIS Query or set session parameters .......................................................................... 46
3.11 AT+FDR Begin or continue phase C data reception............................................................. 47
3.12 AT+FDT Data Transmission.................................................................................................. 47
3.13 AT+FET End a page or document ........................................................................................ 48
3.14 AT+FK Kill operation, orderly FAX abort ............................................................................... 48
3.15 AT+FLID Query or set the Local Id setting capabilities......................................................... 48
3.16 AT+FMDL identify Product Model ......................................................................................... 49
3.17 AT+FMFR Request Manufacturer Identification.................................................................... 49
3.18 AT+FOPT Set bit order independently .................................................................................. 49
3.19 AT+FPHCTO DTE Phase C Response Timeout................................................................... 50
3.20 AT+FREV Identify Product Revision ..................................................................................... 50
3.21 AT+FRH Receive Data Using HDLC Framing ...................................................................... 50
3.22 AT+FRM Receive Data ......................................................................................................... 51
3.23 AT+FRS Receive Silence...................................................................................................... 51
3.24 AT+FTH Transmit Data Using HDLC Framing...................................................................... 51
3.25 AT+FTM Transmit Data......................................................................................................... 52
3.26 AT+FTS Stop Transmission and Wait................................................................................... 52
3.27 AT+FVRFC Vertical resolution format conversion ................................................................ 53
4 AT Commands originating from GSM 07.07 ............................................ 54
4.1 AT+CACM Accumulated call meter (ACM) reset or query.................................................... 54
4.2 AT+CALA Set alarm time ......................................................................................................55
4.3 AT+CAMM Accumulated call meter maximum (ACMmax) set or query ............................... 58
4.4 AT+CAOC Advice of Charge information.............................................................................. 59
4.5 AT+CBST Select bearer service type ................................................................................... 60
4.6 AT+CCFC Call forwarding number and conditions control ...................................................61
4.6.1 Examples: Call forwarding...................................................................................................... 62
4.7 AT+CCLK Real Time Clock................................................................................................... 64
4.8 AT+CEER Extended error report........................................................................................... 65
4.9 AT+CFUN Set phone functionality ........................................................................................ 66
4.10 AT+CGMI Request manufacturer identification...................................................................... 70
4.11 AT+CGMM Request model identification .............................................................................. 70
4.12 AT+CGMR Request revision identification of software status .............................................. 70
4.13 AT+CGSN Request product serial number identification (IMEI) identical to GSN................ 71
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AT Command Set
4.14 AT+CHLD Call hold and multiparty ........................................................................................ 71
4.15 AT+CHUP Hang up call......................................................................................................... 72
4.16 AT+CIMI Request international mobile subscriber identity ................................................... 72
4.17 AT+CLCC List current calls of ME......................................................................................... 73
4.18 AT+CLCK Facility lock........................................................................................................... 74
4.18.1 Examples: Enabling / disabling PIN 1 authentication............................................................. 76
4.18.2 Examples: Phone lock ............................................................................................................ 76
4.18.3 Examples: Call barring ........................................................................................................... 78
4.19 AT+CLIP Calling line identification presentation ................................................................... 80
4.20 AT+CLIR Calling line identification restriction (by *# sequence) ........................................... 81
4.21 AT+CLVL Loudspeaker volume level .................................................................................... 82
4.22 AT+CMEE Report mobile equipment error ........................................................................... 83
4.23 AT+CMUT Mute control......................................................................................................... 84
4.24 AT+CMUX Enter multiplex mode .......................................................................................... 85
4.24.1 Restricted use of AT commands in Multiplex mode ............................................................... 86
4.25 AT+COPN Read operator names ......................................................................................... 88
4.26 AT+COPS Operator selection ............................................................................................... 89
4.27 AT+CPAS Mobile equipment activity status .......................................................................... 91
4.28 AT+CPBR Read current phonebook entries ......................................................................... 92
4.29 AT+CPBS Select phonebook memory storage..................................................................... 93
4.30 AT+CPBW Write phonebook entry........................................................................................ 94
4.31 AT+CPIN Enter PIN............................................................................................................... 95
4.31.1 What to do if PIN or password authentication fails?............................................................... 98
4.32 AT+CPIN2 Enter PIN2 ......................................................................................................... 100
4.33 AT+CPUC Price per unit and currency table....................................................................... 102
4.34 AT+CPWD Change password............................................................................................. 103
4.35 AT+CR Service reporting control......................................................................................... 105
4.36 AT+CRC Set Cellular Result Codes for incoming call indication ........................................ 106
4.37 AT+CREG Network registration .......................................................................................... 107
4.38 AT+CRLP Select radio link protocol param. for orig. non-transparent data call ................. 109
4.39 AT+CRSM Restricted SIM access ...................................................................................... 110
4.40 AT+CSCS Set TE character set.......................................................................................... 111
4.41 AT+CSNS Single Numbering Scheme................................................................................ 112
4.42 AT+CSQ Signal quality........................................................................................................ 113
4.43 AT+CSSN Supplementary service notifications .................................................................. 114
4.44 AT+CUSD Unstructured supplementary service data......................................................... 115
4.45 AT+VTD=<n> Tone duration ............................................................................................... 116
4.46 AT+VTS DTMF and tone generation (<Tone> in {0-9, *, #, A, B, C, D})............................. 117
4.47 AT+WS46 Select wireless network ...................................................................................... 118
5 AT commands originating from GSM 07.05 for SMS ............................ 119
5.1 AT+CMGC Send an SMS command................................................................................... 119
5.2 AT+CMGD Delete SMS message....................................................................................... 120
5.3 AT+CMGF Select SMS message format ............................................................................ 120
5.4 AT+CMGL List SMS messages from preferred store ......................................................... 121
5.5 AT+CMGR Read SMS message......................................................................................... 124
5.6 AT+CMGS Send SMS message ......................................................................................... 127
5.7 AT+CMGW Write SMS message to memory...................................................................... 129
5.8 AT+CMSS Send SMS message from storage .................................................................... 131
5.9 AT+CNMA New SMS message acknowledge to ME/TE, only phase 2+............................ 132
5.10 AT+CNMI New SMS message indications .......................................................................... 133
5.11 AT+CPMS Preferred SMS message storage...................................................................... 135
5.12 AT+CSCA SMS service centre address.............................................................................. 137
5.13 AT+CSCB Select cell broadcast messages ........................................................................ 138
5.14 AT+CSDH Show SMS text mode parameters..................................................................... 139
5.15 AT+CSMP Set SMS text mode parameters........................................................................ 140
5.16 AT+CSMS Select Message Service.................................................................................... 141
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AT Command Set
6 GPRS AT commands in accordance with GSM 07.07 ........................... 142
6.1 Commands specific to MTs supporting GPRS..................................................................... 142
6.1.1 AT+CGATT GPRS attach and detach................................................................................. 142
6.1.2 AT+CGACT PDP context activate or deactivate................................................................. 143
6.1.3 AT+CGDATA Enter data state ............................................................................................ 144
6.1.4 AT+CGDCONT Define PDP Context ..................................................................................145
6.1.5 AT+CGQMIN Quality of Service Profile (Minimum acceptable).......................................... 147
6.1.6 AT+CGQREQ Quality of Service Profile (Requested) ........................................................151
6.1.7 AT+CGSMS Select service for MO SMS messages........................................................... 155
6.1.8 AT^SGAUTH Set type of authentication for PPP connection ............................................ 156
6.2 Modem compatibility commands to MTs supporting GPRS................................................. 157
6.3 ATD *99# Request GPRS service....................................................................................... 157
6.3.1 ATD *98# Request GPRS IP service ................................................................................. 158
6.3.2 ATH Manual rejection of a network request for PDP context activation ............................. 159
6.4 Using GPRS AT commands (examples) .............................................................................. 160
6.4.1 Miscellaneous AT commands .............................................................................................. 160
6.5 Using the GPRS dial command ATD ................................................................................... 162
7 AT Commands for SIM Application Toolkit (GSM 11.14) ...................... 163
7.1 AT^SSTA Remote-SAT Interface Activation ........................................................................ 164
7.2 ^SSTN Remote-SAT Notification.......................................................................................... 165
7.3 AT^SSTGI Remote-SAT Get Information............................................................................. 166
7.4 AT^SSTR Remote-SAT Response....................................................................................... 167
8 Siemens defined AT commands for enhanced functions..................... 168
8.1 AT+CXXCID Display card ID (identical to AT^SCID) .......................................................... 168
8.2 AT^MONI Monitor idle mode and dedicated mode ............................................................. 169
8.3 AT^MONP Monitor neighbour cells ..................................................................................... 171
8.4 AT^SACM Advice of charge and query of ACM and ACMmax........................................... 172
8.5 AT^SBC Battery charging / discharging and charge control ............................................... 173
8.6 AT^SCID Display SIM card identification number............................................................... 176
8.7 AT^SCKS Set SIM connection presentation mode and query SIM connection status ....... 177
8.8 AT^SCNI List Call Number Information............................................................................... 178
8.9 AT^SCTM Set critical operating temperature presentation mode or query temperature.... 179
8.10 AT^SDLD Delete the “last number redial“ memory............................................................. 181
8.11 AT^SHOM Display Homezone ............................................................................................ 181
8.12 AT^SLCD Display Last Call Duration .................................................................................. 181
8.13 AT^SLCK Facility lock .........................................................................................................182
8.14 AT^SMGL List SMS messages from preferred storage ...................................................... 183
8.15 AT^SMGO Set or query SMS overflow presentation mode or query SMS overflow........... 184
8.16 AT^SMSO Switch off mobile station.................................................................................... 185
8.17 AT^SMGR Read SMS message without set to REC READ ............................................... 185
8.18 AT^SM20 Set M20 Compatibility......................................................................................... 186
8.19 AT^SNFD Set audio parameters to manufacturer default values ....................................... 187
8.20 AT^SNFI Set microphone path parameters ........................................................................ 187
8.21 AT^SNFM Mute microphone ............................................................................................... 188
8.22 Audio programming model ................................................................................................... 188
8.23 AT^SNFO Set audio output (= loudspeaker path) parameter ............................................. 189
8.24 AT^SNFS Select audio hardware set.................................................................................. 190
8.25 AT^SNFV Set loudspeaker volume..................................................................................... 191
8.26 AT^SNFW Write audio setting in non-volatile store ............................................................ 191
8.27 AT^SPBC Search the first entry in the sorted telephone book ........................................... 192
8.28 AT^SPBG Read entry from active telephone book via sorted index................................... 193
8.29 AT^SPBS Steps the selected phonebook alphabetically .................................................... 194
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AT Command Set
8.30 AT^SPIC Display PIN counter............................................................................................. 195
8.31 AT^SPLM Read the PLMN list ............................................................................................ 196
8.32 AT^SPLR Read entry from the preferred operators list ...................................................... 197
8.33 AT^SPLW Write an entry to the preferred operators list ..................................................... 198
8.34 AT^SPWD Change password for a lock.............................................................................. 199
8.35 AT^SSYNC Configure SYNC Pin........................................................................................ 201
8.36 AT^STCD Display Total Call Duration................................................................................. 203
9 APPENDIX................................................................................................. 204
9.1 Summary of ERRORS and Messages ................................................................................. 204
9.1.1 Summary of CME ERRORS related to GSM 07.07 ............................................................. 204
9.1.2 Summary of GPRS-related CME ERRORS ......................................................................... 205
9.1.3 Summary of CMS ERRORS related to GSM 07.05 ............................................................. 206
9.1.4 Summary of Unsolicited Result Codes (URC) ..................................................................... 208
9.1.5 Result codes......................................................................................................................... 210
9.1.6 Cause Location ID for the extended error report (AT+CEER) ............................................. 210
9.1.7 GSM release cause for L3 Radio Resource (RR) (AT+CEER) ........................................... 211
9.1.8 SIEMENS release cause for L3 Radio Resource (RR) (AT+CEER)................................... 211
9.1.9 GSM release cause for L3 Mobility Management (MM) (AT+CEER)................................... 212
9.1.10 SIEMENS release cause for L3 Mobility Management (MM) (AT+CEER)........................... 213
9.1.11 GSM release cause for L3 Call Control (CC) (AT+CEER) ................................................... 213
9.1.12 SIEMENS release cause for L3 Call Control (CC) (AT+CEER) ........................................... 214
9.1.13 SIEMENS release cause for L3 Advice of Charge (AOC) (AT+CEER) .............................. 215
9.1.14 GSM release cause for Supplementary Service call (AT+CEER)........................................ 215
9.1.15 Siemens release cause for Call related Supplementary Services (CRSS) (AT+CEER).... 216
9.1.16 GSM release cause for Session Management (SM) (AT+CEER)........................................ 216
9.1.17 SIEMENS release cause for Session Management (SM) (AT+CEER)................................ 217
9.1.18 SIEMENS release cause for GPRS API (AT+CEER) ......................................................... 217
9.1.19 SIEMENS release cause for Embedded Netcore (AT+CEER) .......................................... 218
9.2 Summary of PIN requiring AT Commands ........................................................................... 219
9.3 AT commands available before entering the SIM PIN .........................................................221
9.4 Standard GSM service codes............................................................................................... 223
9.4.1 Additional notes on ^SCCFC, ^SCCWA, ^SCLCK............................................................... 225
9.5 Alphabet tables..................................................................................................................... 227
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AT Command Set
0 Version History
This chapter reports modifications and improvements over previous versions of the document.
"AT Command Set" Version MC35-ATC_01_V02.00 => MC35_ATC_01_V03.02
Chapter Page AT command What is new
1.5.2 12 Note regarding sequential order of concatenated commands added.
4.5 60 AT+CBST Command syntax corrected: Parameter <speed> is
mandatory.
4.6 61 AT+CCFC New <class> parameters added.
4.9 66 AT+CFUN SLEEP mode described in greater detail
4.18 74 AT+CLCK New <class> parameters added.
4.31.1 98 AT+CPIN Timing algorithm of incorrect password corrected
4.42 113 AT+CSQ Note added: Realistic BER values can be obtained
only if there is a call in progress.
5.11 135 AT+CPMS Difference between SM, ME and MT storage explained.
6.1.8 156 AT^SGAUTH New command to specify protocol for PPP authentication
8.2 169f AT^MONI Channel numbers are now issued in the form of 4-digit
numbers. Therefore, the examples on page 169 have
been updated.
Frequency hopping will now be indicated with “h” (instead of the previously used “0”.
Notes modified: If during a connection the radio cell is
changed, the parameters LAC, Cell, NCC BCC, PWR
and RXLev of the ‘Serving Cell’ part will not be updated.
8.7 177 AT^SCKS Presentation mode of the ^SCKS URC will be saved
upon MC35 restart.
Notes regarding empty SIM card tray modified.
8.9 179 AT^SCTM Chapter revised due to improved presentation of temperature shutdown URCs.
9.2 219 AT+CXXCID
AT^SCID
Both commands now independent of PIN authentication
AT^SGAUTH
9.1 - 9.1.19 204 - 218 Lists of result codes restructured.
9.4
9.4.1
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223f
225f
*# codes Chapter revised. Further examples added.
Command added to list of PIN independent commands
AT Command Set
1 Introduction
1.1 Scope of the document
This document presents the AT Command Set for the Siemens cellular engines
MC35 Module
MC35 Terminal
The AT commands detailed in this document are supported by both products. Where differences occur, they are noted in the chapter that refers to the command. In the present version, the only exceptions concern these commands:
Table 1: Product specific use of AT commands
AT command MC35 Module MC35 Terminal
AT+CALA, Chapter 4.2 Alarm mode and reminder call
fully applicable
Does not support Alarm mode.
Please ignore any information relating to the subject.
The reminder call can be used as
described.
AT^SSYNC, Chapter 8.35 SYNC pin may be assigned dif-
ferent functions: <mode> 0 or 1.
AT^SBC, Chapter 8.5 All functions fully applicable Command not applicable.
MC35 and MC35 Terminal feature basic SIM Application Toolkit (SAT) functionality which enables SIM
cards to run additional network based applications, such as value added services, online banking, information services etc. To give you an idea, Chapter 7 provides a brief overview. In greater detail, the
SAT functions and the required AT commands are described in [4].
SYNC pin supports only <mode>=1
(LED status).
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AT Command Set
1.2 Supported product versions and related documents
Please note that this AT Command Set is intended for MC35 Version 03.02
Related documents
[1] MC35 Hardware Interface Description, Version 03.02
[2] Release Notes: MC35, Version 03.02
[3] MC35 GPRS Startup User's Guide
[4] MC35 Remote-SAT User's Guide
[5] MC35 Multiplexer User's Guide, Version 03.02
[6] Application Note 16: Updating MC35 Firmware, Version 02.00
[7] MC35 Terminal Hardware Interface Description
[8] TC35 MC35 Terminal User's Guide
[9] Application Note 02: Audio Interface
[10] Multiplex Driver Developer’s Guide for Windows 2000 and Windows XP
[11] Multiplex Driver Installation Guide for Windows 2000 and Windows XP
Prior to using MC35 / MC35T or upgrading to a new firmware release, be sure to carefully read and
understand the latest product information provided in the Release Notes.
To visit the Siemens Website you can use the following link:
http://www.siemens.com/wm
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AT Command Set
1.3 Conventions
Throughout the document, the GSM engines are referred to as ME (Mobile Equipment), MS (Mobile
Station), TA (Terminal Adapter), DCE (Data Communication Equipment) or facsimile DCE (FAX modem, FAX board). When the Siemens product names are required to distinguish the two models,
MC35 is short for the engine type and MC35T for the terminal.
To control your GSM engine you can simply send AT Commands via its serial interface. The controlling device at the other end of the serial line is referred to as TE (Terminal Equipment), DTE (Data
Terminal Equipment) or plainly ´the application´ (probably running on an embedded system).
1.4 Supported character sets
The ME uses 2 character sets: GSM 03.38 (7 bit, see character tables in Chapter 9.5, pg. 224) and
UCS2 (16 Bit, refer ISO/IEC 10646). Also refer to Chapter 4.40 for information about selecting the
character set.
When using an ASCII terminal to write characters differently coded in ASCII and GSM (e.g. Ä, Ö, Ü),
you need to enter escape sequences. Such a character is translated into the corresponding GSM
character value and when output later, the GSM character value is presented. Any ASCII terminal then
will show wrong responses.
Table 2: Character definitions depending on alphabet (examples)
GSM 03.38
character
GSM character
hex. value
Corresponding
ASCII character
ASCII
Esc sequence
Hex
Esc sequence
Ö 5C \ \5C 5C 35 43
" 22 “ \22 5C 32 32
ò 08 BSP \08 5C 30 38
@ 00
1)
Use of the GSM Null character may cause problems on application level when using a ´C´-function
1)
NULL \00 5C 30 30
as “strlen()“ and should thus be represented by an escape sequence.
1.5 AT command syntax
The "AT" or "at" prefix must be set at the beginning of each command line. To terminate a command
line enter <CR>.
Commands are usually followed by a response that includes “<CR><LF><response><CR><LF>”.
Throughout this document, only the responses are presented, <CR><LF> are omitted intentionally.
Table 3: Types of AT commands and responses
Test command AT+CXXX=? The mobile equipment returns the list of parameters and
value ranges set with the corresponding Write command
or by internal processes.
Read command AT+CXXX? This command returns the currently set value of the pa-
rameter or parameters
Write command AT+CXXX=<...> This command sets user-definable parameter values.
Execution command AT+CXXX The execution command reads non-variable parameters
affected by internal processes in the GSM engine.
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AT Command Set
1.5.1 Using parameters
• Default parameters are underlined throughout this document.
• Optional parameters are enclosed in square brackets. If optional parameters are omitted, the cur-
rent settings are used until you change them.
• Optional parameters or subparamters can be omitted unless they are followed by other parameters. If you want to omit a parameter in the middle of a string it must be replaced by a comma. Example:
AT+CPBW=,<number>,<type>,<text> writes a phonebook entry to the first free memory location.
AT+CPBW=<index>,<number>,<type>,<text> writes a phonebook entry to the memory location
specified by <index>.
• When the parameter is a character string, e.g. <text> or <number>, the string must be enclosed in
quotation marks, e.g. "Charlie Brown" or "+49030xxxx". Symbols within quotation marks will be
recognized as strings.
• All spaces will be ignored when using strings without quotaton marks.
• It is possible to omit the leading zeros of strings which represent numbers.
• In case of using V.25ter commands without giving an optional parameter, its value is assumed to
be 0.
1.5.2 Combining AT commands on the same command line
You may enter several AT commands on the same line. This eliminates the need to type the "AT" or
"at" prefix before each command. Instead, it is only needed once at the beginning of the command
line. Use a semicolon as command delimiter.
The command line buffer accepts a maximum of 391 characters. If this number is exceeded none of
the commands will be executed and TA returns ERROR.
The table below lists the AT commands you cannot enter together with other commands on the same
line. Otherwise, the responses may not be in the expected order.
Table 4: Illegal combinations of AT commands
V.25ter commands With
GSM 7.07 commands With
GSM 7.05 commands (SMS) --- To be used standalone
Commands starting with AT& --- To be used standalone
AT+IPR --- To be used standalone
Note: When concatenating AT commands please keep in mind that the sequence of processing may
be different from the sequential order of command input. Therefore, if the consecutive order of
the issued commands is your concern, avoid concatenating commands on the same line.
FAX commands, Prefix AT+F
Siemens commands, Prefix AT^S
1.5.3 Entering successive AT commands on separate lines
When you enter a series of AT commands on separate lines, leave a pause between the preceding
and the following command until OK appears. This avoids sending too many AT commands at a time
without waiting for a response for each.
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AT Command Set
2 Standard V.25ter AT Commands
These AT Commands are related to ITU-T (International Telecommunication Union, Telecommunication sector) V.25ter document.
MC35 supports the registers S0-S29. You can change S0,S3,S4,S5,S6,S7,S8,S10,S18 by using the
appropriate ATSn commands. All the other registers are read-only and for internal usage only!
2.1 A/ Repeat previous command line
Execute commandA/Response
Repeats previous command line. Line does not need to end with terminating
character.
Parameter
Reference
V.25ter
Note
• After beginning with the character “a“ or „A“, a second character “t“ ,”T“ or “/“
has to follow. In case of using a wrong second character, it is necessary to
start again with character “a“ or “A“.
• If autobauding is active (see +IPR, pg. 37) A/ (and a/) cannot be used.
2.2 +++ Switch from data mode to command mode
Execute command
+++
Reference
V.25ter
Response
This command is only available during data calls. The +++ character sequence
causes the TA to cancel the data flow over the AT interface and switch to command mode. This allows you to enter AT commands while maintaining the data
connection to the remote device.
OK
To prevent the +++ escape sequence from being misinterpreted as data, it must
be preceded and followed by a pause of at least 1000 ms. The +++ characters
must be entered in quick succession, all within 1000 ms.
Note:
• To return from on-line command mode to on-line data mode: Enter ATO as described in Chapter 2.17.
MC35_ATC_01_V03.02 Page 13 of 228 13.03.2002
AT Command Set
2.3 AT\Qn Flowcontrol
Execute command
AT\Q<n>
Reference Note
Response
OK
Parameter
<n> 0 AT\Q0 disables flow control
1 AT\Q1 XON/XOFF software flow control
2 AT\Q2 only CTS by DCE
3 AT\Q3 RTS/CTS
Line state refers to RS-232 levels.
2.4 ATA Answer a call
Execute command
ATA
TA causes remote station to go off-hook (e.g. answer call).
Note1: Any additional commands on the same command line are ignored.
Note2: This command may be aborted generally by receiving a character during
execution. It can´t be aborted in some connection setup states, such as
handshaking.
Reference
V.25ter
Response
Response in case of data call, if successfully connected:
CONNECT<text> TA switches to data mode.
Note: <text> output only if +ATX parameter setting with value > 0.
Response in case of voice call, if successfully connected:
OK
When TA returns to command mode after call release:
OK
Response if no connection:
NO CARRIER
Parameter
Note
See also AT+ATX and Chapter 9.1.5 for <text>
MC35_ATC_01_V03.02 Page 14 of 228 13.03.2002
AT Command Set
2.5 ATD Mobile originated call to dial a number
Execute command
ATD[<n>]
[<mgsm][;]
This command can be used to set up outgoing voice, data or fax calls. It also
serves to control supplementary services.
Note:
The command may be aborted generally when receiving an ATH command during
execution. It can´t be aborted in some connection setup states, such as handshaking. Different behaviour between voice and data call. Behaviour depends on
parameter setting of AT^SM20. Voice call setup terminates immediately with OK.
Data call setup terminates when call has been established.
Response
If no dialtone (parameter setting ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If a connection cannot be set up:
NO CARRIER
Reference
V.25ter/GSM
07.07
If successfully connected and non-voice call:
CONNECT<text> TA switches to data state.
Note: <text> output only if +ATX parameter setting with value > 0.
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Parameter
<n> String of dialling digits and optionally V.25ter modifiers (dialling digits):
0-9, * , #, +, A, B, C
V.25ter modifiers: these are ignored: ,(comma), T, P, !, W, @
Emergency call:
<n> = 112 worldwide number (no SIM needed)
<mgsm> String of GSM modifiers:
I Activates CLIR (disables presentation of own phone number to called
party)
i Deactivates CLIR (enables presentation of own phone number to
called party)
<;> Only required to set up voice calls. TA remains in command mode.
Note
• Parameter ”l“ and ”i“ only if no *# code is within the dial string.
• <mgsm> is not supported for data calls.
• <n> is default for last number that can be dialled by ATDL.
• See also +ATX and chapter 9.1.5 for <text>.
• The *# codes can only be used with voice calls (i.e.if “;” is appended).
• If ATD is used with a USSD command (e.g. ATD*100#;) an AT+CUSD=1 is
executed implicitly (see AT+CUSD, pg. 115).
MC35_ATC_01_V03.02 Page 15 of 228 13.03.2002
AT Command Set
2.6 ATD><mem><n> Originate call to phone number <n> in memory <mem>
This command allows you to dial a phone number from a specific phonebook. To initiate a call, enter
a two letter abbreviation for the phonebook <mem>, followed by the memory location <n> of the desired entry. The location range of each phonebook can be queried by AT+CPBR (see Chapter 4.28).
Execute command
ATD><mem>
<n>[<mgsm>][;]
TA attempts to set up an outgoing call to the specified number.
Note: This command may be aborted generally by receiving a character during
execution. Abortion is not possible during some states of connection
setup such as handshaking.
Response
If error is related to ME functionality:
+CME ERROR: <err>
If no dialtone (parameter setting ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
If successfully connected and non-voice call:
CONNECT<text> TA switches to data state.
Note: <text> output only if +ATX parameter setting with value > 0.
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Parameter
<mem> phonebook:
"SM” SIM phonebook (storage depending on SIM card)
”FD” SIM fixdialling phonebook (pos. 1-7)
”LD” SIM last-dialling-phonebook (usually the last 10 numbers di-
aled are stored on the SIM card, no matter whether or not the
calls were successfully set up)
”MC” ME missed (unanswered received) calls list (up to 10 numbers)
”RC” SIM received calls list
”ME” ME Phonebook (up to 50 numbers)
”ON” SIM (or ME) own numbers (MSISDNs) list
Note: <mem> must be included in quotation marks (""), if parameter
<mgsm> is used. If not, quotation marks are optional.
<n> Integer type memory location in the range of locations available in
the selected memory, i.e. the index number returned by AT+CPBR.
<mgsm> I Activates CLIR (disables presentation of own phone number to
called party)
i Deactivates CLIR (enables presentation of own phone number
MC35_ATC_01_V03.02 Page 16 of 228 13.03.2002
AT Command Set
<;> Only required to set up voice calls. TA remains in command mode.
to called party)
Reference
V.25ter/GSM
07.07
Example
Note
• There is no <mem> for emergency call (“EN”).
• Command is not supported for data call!
• Parameter <mgsm> only if no *# code is within the dial string.
• The *#-codes can only be used with voice calls (i.e.if “;” is appended).
• See also ATX and chapter 9.1.5 for <text>.
To query the location number of the phonebook entry:
AT+CPBR=1,xx
TA returns the entries available in the active phonebook.
To dial a number from the SIM phonebook, for example the number stored to location 15:
ATD>SM15;
OK
To dial a phone number stored in the last dial memory on the SIM card:
ATD>LD9;
OK
MC35_ATC_01_V03.02 Page 17 of 228 13.03.2002
AT Command Set
2.7 ATD><n> Originate call to phone number selected from active memory
This command can be used to dial a phone number selected from the active memory. The active
memory is the phonebook selected with AT+CPBS (see Chapter 4.29). To set up a call simply enter
the memory location of the desired entry. The memory location range of each phonebook can be
queried by AT+CPBR (see Chapter 4.28).
Execute command
ATD><n>[<mgsm>][;]
TA attempts to set up an outgoing call to the stored number.
Note: This command may be aborted generally by receiving a character
during execution. It can´t be aborted in some connection setup states,
such as handshaking.
Response
If error is related to ME functionality:
+CME ERROR: <err>
If no dialtone (parameter setting ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If a connection cannot be set up:
NO CARRIER
If successfully connected and non-voice call:
CONNECT<text> TA switches to data state.
Note: <text> output only if +ATX parameter setting with value > 0.
Reference
V.25ter/GSM 07.07
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Parameter
<n> integer type memory location should be in the range of locations
available in the memory used, i.e. the index number returned by
AT+CPBR.
<mgsm> I Activates CLIR (disables presentation of own phone number to
called party)
i Deactivates CLIR (enables presentation of own phone number
to called party)
<;> Only required to set up voice calls. TA remains in command mode.
Note
• Parameter <mgsm> only if no *# code is within the dial string.
• Command is not supported for data call!
• The *# codes can only be used with voice calls (i.e.if “;” is appended).
• See also +ATX and chapter 9.1.5 for <text>.
MC35_ATC_01_V03.02 Page 18 of 228 13.03.2002
AT Command Set
2.8 ATD><str> Originate call to phone number in memory with corresponding field
This command searches the active phonebook for a given string <str> and dials the assigned phone
number. The active phonebook is the one set with AT+CPBS.
Execute command
ATD><str>[mgsm][;]
TA attempts to set up an outgoing call to stored number
Note: This command may be aborted generally by receiving a character dur-
ing execution. It can´t be aborted in some connection setup states,
such as handshaking.
Response
If error is related to ME functionality:
+CME ERROR: <err>
If no dialtone (parameter setting ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If a connection cannot be set up:
NO CARRIER
If successfully connected and non-voice call:
CONNECT<text> TA switches to data state.
Note: <text> output only if +ATX parameter setting with value > 0.
When TA returns to command mode after call release:
OK
Reference
V.25ter/GSM 07.07
If successfully connected and voice call:
OK
Parameter
<str> string type value (“x”), which should equal an alphanumeric field in
at least one phonebook entry in the searched memories; used character set should be the one selected with Select TE Character Set
+CSCS. <str> can contain escape sequences as described in
chapter “Supported character sets“, pg. 11.
<str> must be wrapped in quotation marks (""), if escape sequences
or parameter <mgsm> are used or if the alphanumeric strings contains a blank. If not, quotation marks are optional.
<mgsm> I Activates CLIR (disables presentation of own phone number to
called party)
i Deactivates CLIR (enables presentation of own phone number to
called party)
<;> Only required to set up voice calls. TA remains in command mode.
Note
Command is not supported for data calls! See also ATX and Chapter 9.1.5 for
<text>
MC35_ATC_01_V03.02 Page 19 of 228 13.03.2002
AT Command Set
2.9 ATDI Mobile originated call to dialable ISDN number <n>
Execute command
ATDI<n>[;]
TA attempts to set up an outgoing call to ISDN number.
Note: This command may be aborted generally by receiving a character during
execution. This command cannot be aborted in some connection setup
states, such as handshaking.
Response
If no dialtone (parameter setting ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If a connection cannot be set up:
NO CARRIER
Reference
V.25ter
If successful connected and non-voice call:
CONNECT<text> TA switches to data state.
Note: <text> output only if +ATX parameter setting with value > 0.
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Parameter
<n> [+]<d> phone number
string with maximum length of 20 characters
+ international dialling format
<d> ISDN number
string of digits: +,0-9, A, B, C
<;> voice call
MC35_ATC_01_V03.02 Page 20 of 228 13.03.2002
AT Command Set
2.10 ATDL Redial last telephone number used
Execute command
ATDL[;]
This command redials the last voice and data call number used in the ATD command.
• To redial the last data call number simply enter ATDL
• To redial the last voice call number type ATDL;
Note: The command may be aborted generally by receiving a character during
execution. This command cannot be aborted in some connection setup
states, such as handshaking.
Response
If there is no last number or number is not valid:
+CME ERROR
If no dialtone (parameter setting ATX2 or ATX4):
NO DIALTONE
Reference
V.25ter
If busy (parameter setting ATX3 or ATX4):
BUSY
If a connection cannot be set up:
NO CARRIER
If successfully connected and non-voice call:
CONNECT<text> TA switches to data state.
Note: <text> output only if +ATX parameter setting with value > 0.
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Parameter
<;> voice call
Note
In case of voice calls “;” is necessary.
MC35_ATC_01_V03.02 Page 21 of 228 13.03.2002
AT Command Set
2.11 ATE Enable command echo
Write command
ATE[<value>]
This setting determines whether or not the TA echoes characters received from
TE during command state.
Response
OK
Parameter
<value> 0 Echo mode off
1 Echo mode on
Reference
V.25ter
Note
In case of using the command without parameter, <value> is set to 0.
2.12 ATH Disconnect existing connection
Execute command
ATH[n]
Reference
V.25ter
Disconnects any call in progress, such as voice calls, CSD data calls and active
GPRS connections. Cancels an active PDP context.
Response
OK
Note:
OK is issued after circuit 109 (DCD) is turned off (RS-232 level), if it was previously on.
Parameter
<n> 0 terminate call
Note
Using ATH in Multiplex mode (AT+CMUX)
• ATH terminates every data call, even if it is issued via logical channels 2 or 3.
• This behaviour is in accordance with ITU-T V.25 ter; (07/97, see “6.3.6 Hook
control“: "ATH is terminating any call in progress")
Using ATH while GPRS is active (PDP context is activated or online):
• CAUTION: The execution of ATH cancels an active PDP context. This takes
effect no matter whether ATH was used to end a voice or data (CSD) call, to
manually reject a network requested PDP context activation as described in
Chapter 6.3.2 or to terminate a call on one of the virtual channels in Multiplex
mode.
The context deactivation can be avoided by terminating a current call with
AT+CHLD=1 instead of ATH. See Chapter 4.14 for AT+CHLD.
MC35_ATC_01_V03.02 Page 22 of 228 13.03.2002
AT Command Set
2.13 ATI Display product identification information
Execute command
ATI
Response
ME issues product information text
SIEMENS
REVISION MC35 xx.yy
xx.yy
OK
Explanation of “Revision“ parameter: Version xx and variant yy of software release.
Reference
Note
V.25ter
2.14 ATI[value] Display additional identification information
Execute command
ATI[value]
Reference
V.25ter
Response
<value>=9 delivers the following information. Other values are not supported and
only return OK.
ATI9 SIEMENS Gipsy Soft Protocolstack V2.550
Note
MC35_ATC_01_V03.02 Page 23 of 228 13.03.2002
AT Command Set
2.15 ATL Set monitor speaker loudness
Execute command
ATL[val]
Response
OK
Reference
V.25ter
Note
• The two commands ATL and ATM are implemented only for V.25ter compatibility reasons and have no effect.
• In multiplex mode the command is supported on logical channel 1 only.
2.16 ATM Set monitor speaker mode
Execute command
ATM[val]
Reference
V.25ter
Response
OK
Note
• The two commands ATL and ATM are implemented only for V.25ter compatibility reasons and have no effect.
• In multiplex mode the command is supported on logical channel 1 only.
2.17 ATO Switch from command mode to data mode
Execute command
ATO[n]
Response
ATO is the alternative command to the +++ escape sequence described in Chapter 2.2: When you have established a data call and TA is in command mode, ATO
causes the TA to resume the data connection and return to data mode.
Reference
V.25ter
If connection is not successfully resumed
NO CARRIER
or
TA returns to data mode from command mode CONNECT <text>
Note: <text> output only if +ATX parameter setting with value > 0.
Parameter
<n> 0 switch from command mode to data mode
Note
MC35_ATC_01_V03.02 Page 24 of 228 13.03.2002
AT Command Set
2.18 ATQ Set result code presentation mode
Write command
ATQ[<n>]
Response
Specifies whether or not the TA transmits any result code to the TE. Information
text transmitted in response is not affected by this setting.
If <n>=0:
OK
If <n>=1:
(none)
Parameter
<n> 0 DCE transmits result code
1 Result codes are suppressed and not transmitted
Reference
Note
V.25ter
2.19 ATP Select pulse dialling
Execute command
ATP
Reference
V.25ter
Response
OK
Note
No effect for GSM
2.20 ATS0 Set number of rings before automatically answering the call
Read command
ATS0?
Write command
ATS0=<n>
Response
<n> OK
Specifies whether or not the TA will accept an incoming data / fax call without
user intervention. <n> determines the number of rings to wait before the TA will
automatically answer.
Response
OK
Parameter
<n> 000 disables automatic answer mode
001-255 enables automatic answering after specified number of rings
Reference
V.25ter
Note
• Auto-answer mode is only applicable to data or fax calls.
• If <n> is set too high, the calling party may hang up before the call can be
automatically answered.
• The correlation between ATS7 and ATS0 is important.
Example: Call setup may fail if ATS0=20 and ATS7=30.
MC35_ATC_01_V03.02 Page 25 of 228 13.03.2002
AT Command Set
2.21 ATS3 Write command line termination character
Read command
ATS3?
Write command
ATS3=<n>
Response
<n> OK
This parameter setting determines the character recognized by TA to terminate
an incoming command line.
Response
OK
Parameter
<n> 000-013-127 command line termination character
Reference
Note
V.25ter
2.22 ATS4 Set response formatting character
Read command
ATS4?
Write command
ATS4=<n>
Reference
V.25ter
Response
<n> OK
This parameter setting determines the character generated by the TA for result
code and information text.
Response
OK
Parameter
<n> 000-010-127 response formatting character.
Note
2.23 ATS5 Write command line editing character
Read command
ATS5?
Write command
ATS5=<n>
Response
<n> OK
This parameter setting determines the character recognized by TA as a request
to delete the immediately preceding character from the command line.
Response
OK
Parameter
<n> 000-008-127 command line editing character
Reference
Note
V.25ter
MC35_ATC_01_V03.02 Page 26 of 228 13.03.2002
AT Command Set
2.24 ATS6 Set pause before blind dialling
Read command
ATS6?
Response
<n> OK
Write command
ATS6=<n>
No effect for GSM
Response
OK
Parameter
<n> 000-255 number of seconds to wait before blind dialling.
Reference
Note
V.25ter
2.25 ATS7 Set number of seconds to wait for connection completion
Read command
ATS7?
Write command
ATS7=<n>
Reference
V.25ter
Response
<n> OK
Specifies the number of seconds the TA will wait for the completion of the call
setup when answering or originating a data call. Also referred to as "no answer
timeout". To put it plainly, this is the time to wait for the carrier signal. If no carrier
signal is received within the specified time, the TA hangs up.
Response
OK
Parameter
<n>0 <n> 000 – 060 no. of seconds to wait for connection completion.
Note
• Values greater than 60 cause no error, but <n> will be restored to the maxi-
mum value of 60.
• If called party has specified a high value for ATS0=<n>, call setup may fail.
• The correlation between ATS7 and ATS0 is important.
Example: Call setup may fail if ATS7=30 and ATS0=20.
• ATS7 is only applicable to data calls.
2.26 ATS8 Set number of seconds to wait for comma dial modifier
Read command
ATS8?
Write command
ATS8=<n>
Reference
V.25ter
MC35_ATC_01_V03.02 Page 27 of 228 13.03.2002
Response
<n> OK
No effect for GSM
Response
OK
Note
AT Command Set
2.27 ATS10 Set disconnect delay after indicating the absence of data carrier
Read command
ATS10?
Response
<n> OK
Write command
ATS10=<n>
This parameter setting determines the amount of time, that the TA remains connected in absence of a data carrier. If the data carrier is detected before disconnect, the TA remains connected.
Response
OK
Parameter
<n> 001-002-254 number of tenths of seconds of delay
Reference
Note
V.25ter
2.28 ATS18 Extended error report
Test command
ATS18?
Execute command
ATS18=<n>
Response
<n> OK
TA returns an extended report of the reason for the last call release and location.
<n> 0 – 255, odd numbers set extended error report and even
numbers disable this feature.
Response
+Cause: <location ID>: <reason > OK
Parameter
<location ID> Location ID as number code (see subclause 9.1.6.
<reason> Reason for last call release as number code (see subclause
Reference
Siemens
Note
This command works for data calls only. For voice calls please use AT+CEER.
2.29 ATT Select tone dialling
Execute command
ATT
Reference
V.25ter
Response
OK
Note
No effect for GSM
9.1.6).
MC35_ATC_01_V03.02 Page 28 of 228 13.03.2002
AT Command Set
2.30 ATV Set result code format mode
Write command
ATV[<value>]
Response
This parameter setting determines the contents of the header and trailer transmitted with result codes and information responses.
When <value> =0
0
When <value> =1
OK
Parameter
<value>
0 Information response: <text><CR><LF>
Short result code format: <numeric code><CR>
1 Information response: <CR><LF><text><CR><LF>
Long result code format: <CR><LF><verbose code><CR><LF>
Reference
V.25ter
Note
In case of using the command without parameter <value> will be set to 0.
Information responses described in chapter 9 (verbose code and numeric code).
2.31 ATX Set CONNECT result code format and call monitoring
Write command
ATX[<value>]
Response
This parameter setting determines whether or not the TA detects the presence of
dial tone and busy signal and whether or not TA transmits particular result codes.
OK
Parameter
<value>
0 CONNECT result code only returned, dial tone and busy de-
tection are both disabled
1 CONNECT<text> result code only returned, dial tone and busy
detection are both disabled
2 CONNECT<text> result code returned, dial tone detection is
enabled, busy detection is disabled
3 CONNECT<text> result code returned, dial tone detection is
disabled, busy detection is enabled
4 CONNECT<text> result code returned, dial tone and busy de-
tection are both enabled
Reference
V.25ter
MC35_ATC_01_V03.02 Page 29 of 228 13.03.2002
Note
Related <text> see chapter 9.1.5.
AT Command Set
2.32 ATZ Set all current parameters to user defined profile
Execute command
ATZ[<value>]
Response
TA sets all current parameters to the user profile stored with AT&W (see Chapter
2.38 on page 34). If a connection is in progress, it will be terminated. All defined
GPRS contexts which are not activated or not online will be undefined (see
+CGDCONT,+CGQREQ,+CGQMIN commands). The user defined profile is
stored to the non-volatile memory.
Note: If invalid, the user profile will be reset to the factory default profile. Any additional commands on the same command line will be ignored. A delay of 300 ms
is required before next command is sent, otherwise “OK” response may be corrupted.
OK
Parameter
<value> 0 Reset to user profile
Reference
V.25ter
Note
The GSM engines referred to in this manual can be assigned two profiles: the
factory profile (restored with AT&F) and the user profile (stored with AT&W). See
Chapter 2.35 for details on AT&F.
2.33 AT&C Set circuit Data Carrier Detect (DCD) function mode
Write command
AT&C[<value>]
Reference
V.25ter
Response
This parameter determines how the state of circuit 109(DCD) relates to the detection of received line signal from the distant end.
OK
Parameter
<value> 0 DCD line is always ON.
1 DCD line is ON in the presence of data carrier only.
Note
Line state refers to RS-232 levels.
MC35_ATC_01_V03.02 Page 30 of 228 13.03.2002
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