概要信息：
AT Command Set
Siemens Cellular EnginesMC35 Module
MC35 Terminal
Version: 03.02
DocID: MC35_ATC_01_V03.02
AT Command Set
MC35_ATC_01_V03.02 Page 2 of 228 13.03.2002
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 tech-
nical 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 Absorp-
tion 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 re-
served in the event of grant of a patent or the registration of a utility model or design.
Copyright © Siemens AG 2002
AT Command Set
MC35_ATC_01_V03.02 Page 3 of 228 13.03.2002
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> Originate call to phone number in memory .......................... 16
2.7 ATD> Originate call to phone number selected from active memory ............................. 18
2.8 ATD> Originate call to phone number in memory with corresponding field.................. 19
2.9 ATDI Mobile originated call to dialable ISDN number .................................................... 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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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= Tone duration ............................................................................................... 116
4.46 AT+VTS DTMF and tone generation ( 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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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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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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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 is
mandatory.
4.6 61 AT+CCFC New parameters added.
4.9 66 AT+CFUN SLEEP mode described in greater detail
4.18 74 AT+CLCK New 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 ex-
plained.
6.1.8 156 AT^SGAUTH New command to specify protocol for PPP authenti-
cation
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 (in-
stead 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 up-
dated.
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 tem-
perature shutdown URCs.
9.2 219 AT+CXXCID
AT^SCID
AT^SGAUTH
Both commands now independent of PIN authentica-
tion
Command added to list of PIN independent com-
mands
9.1 - 9.1.19 204 - 218 Lists of result codes restructured.
9.4
9.4.1
223f
225f
*# codes Chapter revised. Further examples added.
AT Command Set
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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 oc-
cur, they are noted in the chapter that refers to the command. In the present version, the only excep-
tions 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 re-
lating to the subject.
The reminder call can be used as
described.
AT^SSYNC, Chapter 8.35 SYNC pin may be assigned dif-
ferent functions: 0 or 1.
SYNC pin supports only =1
(LED status).
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, in-
formation 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].
AT Command Set
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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 Developers 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
AT Command Set
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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 mo-
dem, 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 control-
ling 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) NULL \00 5C 30 30
1) Use of the GSM Null character may cause problems on application level when using a ´C´-function
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 .
Commands are usually followed by a response that includes .
Throughout this document, only the responses are presented, 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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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 parame-
ters. If you want to omit a parameter in the middle of a string it must be replaced by a comma. Ex-
ample:
AT+CPBW=,,, writes a phonebook entry to the first free memory location.
AT+CPBW=,,, writes a phonebook entry to the memory location
specified by .
• When the parameter is a character string, e.g. or , 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 FAX commands, Prefix AT+F
GSM 7.07 commands With Siemens commands, Prefix AT^S
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.
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.
AT Command Set
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2 Standard V.25ter AT Commands
These AT Commands are related to ITU-T (International Telecommunication Union, Telecommunica-
tion 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 command
A/
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
+++
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 com-
mand 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.
Reference
V.25ter
Note:
• To return from on-line command mode to on-line data mode: Enter ATO as de-
scribed in Chapter 2.17.
AT Command Set
MC35_ATC_01_V03.02 Page 14 of 228 13.03.2002
2.3 AT\Qn Flowcontrol
Execute command
AT\Q
Response
OK
Parameter
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
Reference Note
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.
Response
Response in case of data call, if successfully connected:
CONNECT TA switches to data mode.
Note: 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
Reference
V.25ter
Note
See also AT+ATX and Chapter 9.1.5 for
AT Command Set
MC35_ATC_01_V03.02 Page 15 of 228 13.03.2002
2.5 ATD Mobile originated call to dial a number
Execute command
ATD[]
[ TA switches to data state.
Note: 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
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:
= 112 worldwide number (no SIM needed)
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.
Reference
V.25ter/GSM
07.07
Note
• Parameter l and i only if no *# code is within the dial string.
• is not supported for data calls.
• is default for last number that can be dialled by ATDL.
• See also +ATX and chapter 9.1.5 for .
• 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).
AT Command Set
MC35_ATC_01_V03.02 Page 16 of 228 13.03.2002
2.6 ATD> Originate call to phone number in memory
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 , followed by the memory location of the de-
sired entry. The location range of each phonebook can be queried by AT+CPBR (see Chapter 4.28).
Execute command
ATD>
[][;]
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:
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 TA switches to data state.
Note: 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
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: must be included in quotation marks (""), if parameter
is used. If not, quotation marks are optional.
Integer type memory location in the range of locations available in
the selected memory, i.e. the index number returned by AT+CPBR.
I Activates CLIR (disables presentation of own phone number to
called party)
i Deactivates CLIR (enables presentation of own phone number
AT Command Set
MC35_ATC_01_V03.02 Page 17 of 228 13.03.2002
to called party)
<;> Only required to set up voice calls. TA remains in command mode.
Reference
V.25ter/GSM
07.07
Note
• There is no for emergency call (EN).
• Command is not supported for data call!
• Parameter 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 .
Example 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 lo-
cation 15:
ATD>SM15;
OK
To dial a phone number stored in the last dial memory on the SIM card:
ATD>LD9;
OK
AT Command Set
MC35_ATC_01_V03.02 Page 18 of 228 13.03.2002
2.7 ATD> 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>[][;]
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:
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 TA switches to data state.
Note: 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
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.
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.
Reference
V.25ter/GSM 07.07
Note
• Parameter 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 .
AT Command Set
MC35_ATC_01_V03.02 Page 19 of 228 13.03.2002
2.8 ATD> Originate call to phone number in memory with corre-
sponding field
This command searches the active phonebook for a given string and dials the assigned phone
number. The active phonebook is the one set with AT+CPBS.
Execute command
ATD>[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:
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 TA switches to data state.
Note: 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
string type value (x), which should equal an alphanumeric field in
at least one phonebook entry in the searched memories; used char-
acter set should be the one selected with Select TE Character Set
+CSCS. can contain escape sequences as described in
chapter Supported character sets, pg. 11.
must be wrapped in quotation marks (""), if escape sequences
or parameter are used or if the alphanumeric strings con-
tains a blank. If not, quotation marks are optional.
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.
Reference
V.25ter/GSM 07.07
Note
Command is not supported for data calls! See also ATX and Chapter 9.1.5 for
AT Command Set
MC35_ATC_01_V03.02 Page 20 of 228 13.03.2002
2.9 ATDI Mobile originated call to dialable ISDN number
Execute command
ATDI[;]
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
If successful connected and non-voice call:
CONNECT TA switches to data state.
Note: 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
[+] phone number
string with maximum length of 20 characters
+ international dialling format
ISDN number
string of digits: +,0-9, A, B, C
<;> voice call
Reference
V.25ter
AT Command Set
MC35_ATC_01_V03.02 Page 21 of 228 13.03.2002
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 com-
mand.
• 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
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 TA switches to data state.
Note: 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
Reference
V.25ter
Note
In case of voice calls ; is necessary.
AT Command Set
MC35_ATC_01_V03.02 Page 22 of 228 13.03.2002
2.11 ATE Enable command echo
Write command
ATE[]
This setting determines whether or not the TA echoes characters received from
TE during command state.
Response
OK
Parameter
0 Echo mode off
1 Echo mode on
Reference
V.25ter
Note
In case of using the command without parameter, is set to 0.
2.12 ATH Disconnect existing connection
Execute command
ATH[n]
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 previ-
ously on.
Parameter
0 terminate call
Reference
V.25ter
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.
AT Command Set
MC35_ATC_01_V03.02 Page 23 of 228 13.03.2002
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 re-
lease.
Reference
V.25ter
Note
2.14 ATI[value] Display additional identification information
Execute command
ATI[value]
Response
=9 delivers the following information. Other values are not supported and
only return OK.
ATI9 SIEMENS Gipsy Soft Protocolstack V2.550
Reference
V.25ter
Note
AT Command Set
MC35_ATC_01_V03.02 Page 24 of 228 13.03.2002
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 compati-
bility 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]
Response
OK
Reference
V.25ter
Note
• The two commands ATL and ATM are implemented only for V.25ter compati-
bility 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 Chap-
ter 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.
If connection is not successfully resumed
NO CARRIER
or
TA returns to data mode from command mode CONNECT
Note: output only if +ATX parameter setting with value > 0.
Parameter
0 switch from command mode to data mode
Reference
V.25ter
Note
AT Command Set
MC35_ATC_01_V03.02 Page 25 of 228 13.03.2002
2.18 ATQ Set result code presentation mode
Write command
ATQ[]
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 =0:
OK
If =1:
(none)
Parameter
0 DCE transmits result code
1 Result codes are suppressed and not transmitted
Reference
V.25ter
Note
2.19 ATP Select pulse dialling
Execute command
ATP
Response
OK
Reference
V.25ter
Note
No effect for GSM
2.20 ATS0 Set number of rings before automatically answering the call
Read command
ATS0?
Response
OK
Write command
ATS0=
Specifies whether or not the TA will accept an incoming data / fax call without
user intervention. determines the number of rings to wait before the TA will
automatically answer.
Response
OK
Parameter
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 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.
AT Command Set
MC35_ATC_01_V03.02 Page 26 of 228 13.03.2002
2.21 ATS3 Write command line termination character
Read command
ATS3?
Response
OK
Write command
ATS3=
This parameter setting determines the character recognized by TA to terminate
an incoming command line.
Response
OK
Parameter
000-013-127 command line termination character
Reference
V.25ter
Note
2.22 ATS4 Set response formatting character
Read command
ATS4?
Response
OK
Write command
ATS4=
This parameter setting determines the character generated by the TA for result
code and information text.
Response
OK
Parameter
000-010-127 response formatting character.
Reference
V.25ter
Note
2.23 ATS5 Write command line editing character
Read command
ATS5?
Response
OK
Write command
ATS5=
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
000-008-127 command line editing character
Reference
V.25ter
Note
AT Command Set
MC35_ATC_01_V03.02 Page 27 of 228 13.03.2002
2.24 ATS6 Set pause before blind dialling
Read command
ATS6?
Response
OK
Write command
ATS6=
No effect for GSM
Response
OK
Parameter
000-255 number of seconds to wait before blind dialling.
Reference
V.25ter
Note
2.25 ATS7 Set number of seconds to wait for connection completion
Read command
ATS7?
Response
OK
Write command
ATS7=
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
0 000 060 no. of seconds to wait for connection completion.
Reference
V.25ter
Note
• Values greater than 60 cause no error, but will be restored to the maxi-
mum value of 60.
• If called party has specified a high value for ATS0=, 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?
Response
OK
Write command
ATS8=
No effect for GSM
Response
OK
Reference
V.25ter
Note
AT Command Set
MC35_ATC_01_V03.02 Page 28 of 228 13.03.2002
2.27 ATS10 Set disconnect delay after indicating the absence of data carrier
Read command
ATS10?
Response
OK
Write command
ATS10=
This parameter setting determines the amount of time, that the TA remains con-
nected in absence of a data carrier. If the data carrier is detected before discon-
nect, the TA remains connected.
Response
OK
Parameter
001-002-254 number of tenths of seconds of delay
Reference
V.25ter
Note
2.28 ATS18 Extended error report
Test command
ATS18?
Response
OK
Execute command
ATS18=
TA returns an extended report of the reason for the last call release and location.
0 255, odd numbers set extended error report and even
numbers disable this feature.
Response
+Cause: : OK
Parameter
Location ID as number code (see subclause 9.1.6.
Reason for last call release as number code (see subclause
9.1.6).
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
Response
OK
Reference
V.25ter
Note
No effect for GSM
AT Command Set
MC35_ATC_01_V03.02 Page 29 of 228 13.03.2002
2.30 ATV Set result code format mode
Write command
ATV[]
Response
This parameter setting determines the contents of the header and trailer transmit-
ted with result codes and information responses.
When =0
0
When =1
OK
Parameter
0 Information response:
Short result code format:
1 Information response:
Long result code format:
Reference
V.25ter
Note
In case of using the command without parameter 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[]
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
0 CONNECT result code only returned, dial tone and busy de-
tection are both disabled
1 CONNECT result code only returned, dial tone and busy
detection are both disabled
2 CONNECT result code returned, dial tone detection is
enabled, busy detection is disabled
3 CONNECT result code returned, dial tone detection is
disabled, busy detection is enabled
4 CONNECT result code returned, dial tone and busy de-
tection are both enabled
Reference
V.25ter
Note
Related see chapter 9.1.5.
AT Command Set
MC35_ATC_01_V03.02 Page 30 of 228 13.03.2002
2.32 ATZ Set all current parameters to user defined profile
Execute command
ATZ[]
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 ad-
ditional 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 cor-
rupted.
OK
Parameter
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[]
Response
This parameter determines how the state of circuit 109(DCD) relates to the de-
tection of received line signal from the distant end.
OK
Parameter
0 DCD line is always ON.
1 DCD line is ON in the presence of data carrier only.
Reference
V.25ter
Note
Line state refers to RS-232 levels.
AT Command Set
MC35_ATC_01_V03.02 Page 31 of 228 13.03.2002
2.34 AT&D Set circuit Data Terminal Ready (DTR) function mode
Write command
AT&D[]
Response
This command is only intended for data calls. The parameter determines
how the TA responds when circuit 108/2 (DTR) is changed from ON to OFF dur-
ing data mode.
OK
Parameter
0 TA ignores status on DTR.
1 ON->OFF on DTR: Change to command mode while retaining
the connected call.
2 ON->OFF on DTR: Disconnect data call, change to command
mode. During state DTR = OFF is auto-answer off.
Reference
V.25ter
Note
Line state refers to RS-232 levels.
2.35 AT&F Set all current parameters to manufacturer defaults
Execute command
AT&F[value]
Response
TA sets all current parameters to the manufacturer defined profile.
OK
Parameter
0 set all TA parameters to manufacturer default
Reference
V.25ter
Note
• List of parameters reset to manufacturer default (sorted by the associated AT
commands):
E, Q, V, X, +CBST, +CRLP, +CRC, +CR, +CNMI, +CMEE, +CSMS, ^SCKS,
^SACM, +CREG, +CLIP, the S Parameters, &D, &C, &S, +CGDCONT,
+CGQREQ, +CGQMIN
• In addition to the default profile, you can store an individual one with AT&W. To
alternate between the two profiles enter either ATZ (loads user profile) or AT&F
(restores factory profile). Refer to Chapter 2.38 for AT&W and Chapter 2.32 for
ATZ.
AT Command Set
MC35_ATC_01_V03.02 Page 32 of 228 13.03.2002
2.36 AT&S Set circuit Data Set Ready (DSR) function mode
Write command
AT&S
Response
This parameter determines how the TA sets circuit 107 (DSR) depending on the
communication state of the TA interfacing TE.
OK
Parameter
0 DSR always on.
1 TA in command mode: DSR is OFF.
TA in data mode: DSR is ON.
Reference
V.25ter
Note
Line state refers to RS-232 levels.
AT Command Set
MC35_ATC_01_V03.02 Page 33 of 228 13.03.2002
2.37 AT&V Display current configuration
Execute command
AT&V[]
Response
TA returns the current parameter setting. The configuration varies depending on
whether or not PIN authentication has been done, or Multiplex mode has been
activated.
Parameter
0 profile number
PIN entered or not required (see
AT+CPIN, pg. 94)
Required PIN not enteredConfiguration
without Multiplex
mode or configu-
ration on chan-
nel 1 if Multiplex
mode is enabled
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D2 &S0 \Q0
S0:000 S3:013 S4:010 S5:008 S6:000 S7:060
S8:000 S10:002 S18:000
+CBST: 7,0,1
+CRLP: 61,61,78,6
+CR: 0
+FCLASS: 0
+CRC: 0
+CMGF: 0
+CNMI: 0,0,0,0,1
+ILRR: 0
+IPR: 0
+CMEE: 0
^SMGO: 0,0
+CSMS: 0,1,1,1
^SACM: 0,"000000","000000"
^SCKS: 0,1
+CREG: 0,1
+CLIP: 0,2
+CAOC: 0
+COPS: 0,0,"operator"
OK
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D2 &S0 \Q0
S0:000 S3:013 S4:010 S5:008 S6:000 S7:060
S8:000 S10:002 S18:000
+CBST: 7,0,1
+CRLP: 61,61,78,6
+CR: 0
+FCLASS: 0
+ILRR: 0
+IPR: 0
+CMEE: 0
^SCKS: 0,1
OK
Logical channels
2 and 3 (Multi-
plex mode en-
abled)
+CRC: 0
+CMGF: 0
+CNMI: 0,0,0,0,1
+ILRR: 0
+IPR: 19200
+CMEE: 0
^SMGO: 0,0
+CSMS: 0,1,1,1
^SACM: 0,"000000","000000"
^SCKS: 0,1
+CREG: 0, 1
+CLIP: 0,2
+CAOC: 0
+COPS: 0,0,"operator"
OK
+ILRR: 0
+IPR: 19200
+CMEE: 0
^SCKS: 0,1
OK
Reference Note: Parameter values and order are subject to change.
AT Command Set
MC35_ATC_01_V03.02 Page 34 of 228 13.03.2002
2.38 AT&W Store current configuration to user defined profile
Execute command
AT&W[]
TA stores the current settings to a user defined profile in the non-volatile memory.
Response
OK or if error is related to ME functionality: ERROR / +CME ERROR:
Parameter
0 number of profile
Reference
V.25ter
Note
The user defined profile will be loaded automatically after PowerUp. Use ATZ to
restore user profile and AT&F to restore factory settings. Until the first use of
AT&W, ATZ works as AT&F. See Chapter 2.32 for details on ATZ and Chapter
2.35 for AT&F.
List of settings stored to user defined profile:
• ATE, ATQ, ATV, ATX, AT+CRC, AT+CMGF, AT+CSDH, AT+CNMI, AT+ILRR,
AT+CMEE, AT^SMGO, AT+CSMS, AT^SACM, ^SCKS, AT+CREG, AT+CLIP,
AT+COPS.
AT&C, AT&D, AT&S, ATS0, ATS3, ATS4, ATS5, ATS6, ATS7, ATS8, ATS10,
ATS18, AT+FCLASS, AT+CBST, AT+CRLP, AT+CR.
User defined profiles in multiplex mode:
• On each multiplexer channel you can save an individual profile.
• List of settings stored to profile on multiplexer channel 1:
ATE, ATQ, ATV, ATX, AT+CRC, AT+CMGF, AT+CSDH, AT+CNMI, AT+ILRR,
AT+CMEE, AT^SMGO, AT+CSMS, AT^SACM, ^SCKS, AT+CREG, AT+CLIP,
AT+COPS.
AT&C, AT&D, AT&S, ATS0, ATS3, ATS4, ATS5, ATS6, ATS7, ATS8, ATS10,
ATS18, AT+FCLASS, AT+CBST, AT+CRLP, AT+CR.
• List of settings stored to profile on multiplexer channels 2 and 3:
ATE, ATQ, ATV, ATX, AT+CRC, AT+CMGF, AT+CSDH, AT+CNMI, AT+ILRR,
AT+CMEE, AT^SMGO, AT+CSMS, AT^SACM, ^SCKS, AT+CREG, AT+CLIP,
AT+COPS. (Parameters for data call are not relevant on channels 2 and 3.)
AT Command Set
MC35_ATC_01_V03.02 Page 35 of 228 13.03.2002
2.39 AT+GCAP Request complete TA capabilities list
Test command
AT+GCAP=?
Response
OK
Parameter
Execute command
AT+GCAP
Response
TA reports a list of additional capabilities.
+GCAP:
OK
Parameter
e.g.: +CGSM,+FCLASS
Reference
V.25ter
Note
+CGSM: The response text shows which GSM commands of the ETSI standard
are supported.
2.40 AT+GMI Request manufacturer identification
Test command
AT+GMI=?
Response
OK
Execute command
AT+GMI
Response
TA reports information to identify the manufacturer.
SIEMENS
OK
Reference
V.25ter
Note
See also AT+CGMI Request manufacturer identification.
2.41 AT+GMM Request TA model identification
Test command
AT+GMM=?
Response
OK
Execute command
AT+GMM
TA reports one or more lines of information text which permit the user to identify
the specific model of device.
MC35
OK
Reference
V.25ter
Note
See also AT+CGMM Request model identification.
AT Command Set
MC35_ATC_01_V03.02 Page 36 of 228 13.03.2002
2.42 AT+GMR Request TA revision identification of software status
Test command
AT+GMR=?
Response
OK
Execute command
AT+GMR
Response
TA returns product software version identification text.
REVISION xx.yy
OK
xx.yy Version xx and variant yy of software release.
Reference
V.25ter
Note
See also AT+CGMR Request revision identification of software status
2.43 AT+GSN Request TA serial number identification(IMEI)
Test command
AT+GSN=?
Response
OK
Execute command
AT+GSN
Response
TA reports one or more lines of information text which permit the user to identify
the individual device.
OK
Parameter
IMEI of the telephone(International Mobile station Equipment Identity)
Reference
V.25ter
Note
The serial number (IMEI) varies for every individual ME device.
AT Command Set
MC35_ATC_01_V03.02 Page 37 of 228 13.03.2002
2.44 AT+ILRR Set TE-TA local rate reporting
Test command
AT+ILRR=?
Response
+ILRR: (list of supported s) OK
Parameter
See write command
Read command
AT+ILRR?
Response
+ILRR: OK
Parameter
See write command
Write command
AT+ILRR=
The write command specifies whether or not an intermediate result code shall in-
dicate the currently used local rate when an incoming or outgoing data call is es-
tablished. The message is transmitted from the DCE (= TA) to the DTE (=TE) be-
fore the final result code of the connection setup (e.g. CONNECT) appears.
Response
OK
Parameter
0 Disables reporting of local port rate
1 Enables reporting of local port rate
Intermediate result code
+ILLR:
Parameter
port rate setting in bit per second
0 (Autobauding, see Chapter 2.45.1)
300
600
1200
2400
4800
9600
19200
38400
57600
115200
Reference
V.25ter
Note
Example ATD030112233445
+ILRR: 57600
CONNECT 9600/RLP
AT Command Set
MC35_ATC_01_V03.02 Page 38 of 228 13.03.2002
2.45 AT+IPR Set fixed local rate
Test command
AT+IPR=?
Response
+IPR: (list of supported auto-detectable s), (list of supported fixed-only
s) OK
Parameter
See write command
Read command
AT+IPR?
Response
+IPR: OK
Parameter
See write command
Write command
AT+IPR=
This command specifies the DTE-DCE bitrate. When you set a fix rate, make sure
that both DTE (TE) and DCE (= TA) are configured to the same rate. When you
select autobauding the DCE will automatically recognize the bitrate currently used
by the DTE.
A selected bitrate takes effect following the issue of any result code associated
with this command (e.g. OK).
The setting is stored in the non-volatile memory and will be used whenever the
engine is powered up again. However, in case of autobaud mode (+IPR=0) the
detected DCE bitrate will not be saved and, therefore, needs to be be re-
synchronized after restarting the GSM engine (see Chapter 2.45.1).
Response
OK or if error is related to ME functionality: ERROR / +CME ERROR:
Parameter
bit rate per second
0 (Autobauding, see Chapter 2.45.1)
300
600
1200
2400
4800
9600
14400
19200
28800
38400
57600
115200
Reference
V.25ter
Note
Your current setting of AT+IPR will be preserved
• when you download new firmware (i.e. a firmware update does not restore the
factory setting);
• in the event of power failure.
Generally, AT+IPR=x should be used as a standalone command. If nevertheless
combinations with other commands on the same line cannot be avoided, there are
several constraints to be considered:
• Avoid combinations with the AT commands listed in Chapter 1.5.2.
AT Command Set
MC35_ATC_01_V03.02 Page 39 of 228 13.03.2002
• Take into account that a delay of 100 ms is required between a response to the
last command (e.g. OK) and the next command on the same line.
• When you enter AT+IPR=0, autobauding will be activated after the response to
the last command is received.
• When local echo is active (ATE1) and you enter AT+IPR=x with other com-
mands you may encounter the following problem: If switching to the new bit
rate takes effect while a response is being transmitted, the last bytes may be
sent at the new bit rate and thus, not properly transmitted. The following com-
mands will be correctly sent at the new bit rate.
2.45.1 Autobauding
Autobauding allows the GSM engine to automatically detect the bitrate configured in the host applica-
tion. The serial interface of the GSM engine supports autobauding for the following bitrates: 1200,
2400, 4800, 9600, 19200, 38400, 57600, 115200. Factory setting is autobauding enabled. This gives
you the flexibility to put the GSM engine into operation no matter what bitrate your host application is
configured to.
To take advantage of autobaud mode specific attention must be paid to the following requirements:
Synchronization between DTE and DCE
Ensure that DTE and DCE are correctly synchronized and the bitrate used by the DTE is detected by
the DCE (= ME). To allow the bitrate to be synchronized simply issue an "AT" or "at" string. This is
necessary
• after you have activated autobauding
• when you start up the GSM engine while autobauding is enabled. It is recommended to wait 3 to 5
seconds before sending the first AT character. Otherwise undefined characters might be returned.
If you want to use autobauding and autoanswer at the same time, you can easily enable the synchro-
nization, when you activate autobauding first and then configure the autoanswer mode (ATS0=0).
Restrictions on autobauding operation
• The serial interface has to be operated at 8 data bits, no parity and 1 stop bit (factory setting).
• The A/ command (and a/) cannot be used.
• Only the strings AT or at can be detected (neither aT nor At).
• The Unsolicited Result Codes "^SYSSTART", "^SYSSTART ALARM MODE" and "^SYSSTART
CHARGE-ONLY MODE" are not indicated when you start up the ME while autobauding is enabled.
This is due to the fact that the new bitrate is not detected unless DTE and DCE are correctly syn-
chronized as described above.
• Any other Unsolicited Result Codes that may be issued before the ME detects the new bitrate (by
receiving the first AT command string) will be sent at the previous bitrate.
• It is not recommended to switch to autobauding from a bitrate that cannot be detected by the auto-
baud mechnism (e.g. 300 baud). Responses to +IPR=0 and any commands on the same line might
be corrupted.
• When entering several AT commands on the same line, consider the requirements described in the
Notes of Chapter 2.45.
• See also AT+ILRR Set TE-TA local rate reporting , pg. 36
Autobauding and multiplex mode
If autobauding is active you cannot switch to multiplex mode (see +CMUX, pg. 85). Vice versa, when
you run the multiplex mode, the write command AT+IPR= cannot be used.
AT Command Set
MC35_ATC_01_V03.02 Page 40 of 228 13.03.2002
3 AT Commands for FAX
The following commands can be used for FAX transmission.
If the ME is acting as a Fax-Modem to a PC-based application (e.g. WinFax) it is necessary to select
the proper Service Class (Fax Class) provided by the ME. The ME reports its Service Class capabili-
ties, both the current setting and the range of services avaible. This is provided by the AT+FCLASS
command (see pg. 42).
Note: When sending a FAX with a standard FAX application for Personal Computers it is recom-
mended to use autobauding (AT+IPR=0).
Currently defind Service Class values (see TIA/EIA-592-A)
ME +FCLASS parameter Service Class Reference, Standard
0 data modem e.g. TIA/EIA-602 or ITU V.25ter
1 Service Class 1 EIA/TIA-578-A
1.0 Service Class 1 ITU-T T.31
2 manufacture specific this document and EIA PN-2388 (draft)
2.0 Service Class 2 TIA/EIA-592
2.1 Service Class 2 TIA/EIA-592-A or ITU-T T.32
8 Voice DCE TIA IS-101
Reserved
Note: Be aware that there is a difference between Service Classes 2 and 2.0! Only the first is applica-
ble to the ME.
3.1 AT+FBADLIN Bad Line Treshold
Read command
AT+FBADLIN?
This command defines the Copy-Quality-OK-threshold. If consecu-
tive lines have pixel count errors in normal resolution (98 dpi) mode, then the
copy quality is unacceptable. If * 2 consecutive lines have pixel count
errors in fine resolution (196 dpi) mode, then the copy quality is unacceptable.
Copy Quality Not OK occurs if either the error percentage is too high or too
many consecutive lines contain errors. A value of 0 implies that error checking
is not present or disabled.
Response
OK
Parameter
See write command
Write command
AT+FBADLIN=
Response
OK
If error is related to ME functionality:
ERROR
Parameter
0 10 255 bad lines
Reference
EIA PN-2388
Note
Used for Fax class 2 only
AT Command Set
MC35_ATC_01_V03.02 Page 41 of 228 13.03.2002
3.2 AT+FBADMUL Error Threshold Multiplier
Read command
AT+FBADMUL?
This command defines the Copy-Quality-OK multiplier. The number of lines
received with a bad pixel count is multiplied by this number. If the result ex-
ceeds the total number of lines on the page the error rate is considered too
high. A threshold multiplier value of 20 corresponds to a 5% error rate. A value
of 0 implies that error checking is not present or disabled.
Response
OK
Parameter
See write command
Write command
AT+FBADMUL=
Response
OK
If error is related to ME functionality:
ERROR
Parameter
0 20 255
Reference
EIA PN-2388
Note
Used for Faxclass 2 only
3.3 AT+FBOR Query data bit order
Test command
AT+FBOR=?
Query the bit order for receive-mode. The mode is set by the ME dependent on
the selected Service Class, see AT+FCLASS Fax: Select, read or test service
class, pg. 42.
Response
(list of supported bit order modes s)
OK
Parameter
See write command
Read command
AT+FBOR?
Response
OK
Parameter
See write command
Write command
AT+FBOR=
Response
OK
Parameter
0 direct bit order for both Phase C and for Phase B/D data.
1 Reversed bit order for Phase C data, direct Bit Order for
Phase B/D data.
Reference
EIA PN-2388
Note
Used for Fax class 2 only
AT Command Set
MC35_ATC_01_V03.02 Page 42 of 228 13.03.2002
3.4 AT+FCIG Query or set the Local polling id
Test command
AT+FCIG =?
Response
(max. length of Local Polling ID string) (range of supported ASCII character val-
ues) OK
Parameter
See write command
Read command
AT+FCIG?
Response
OK
Parameter
See write command
Write command
AT+FCIG =
Response
OK
Parameter
Local Polling ID string, max. length and possible content as reported
by test command. Default value is empty string ().
Reference
EIA PN-2388
Note
See also AT+FLID Query or set the Local Id setting capabilities, pg. 48.
Used for Faxclass 2 only
3.5 AT+FCLASS Fax: Select, read or test service class
Test command
AT+FCLASS=?
See introduction to fax commands, pg. 40.
Response
(list of supported s)
OK
Parameter
See write command
Read command
AT+FCLASS?
Response
OK
Parameter
See write command
Write command
AT+FCLASS=
The ME is set to a particular mode of operation (data, fax). This causes the MA
to process information in a manner suitable for that type of information.
Response
OK
Parameter
0 data (e.g. EIA/TIA-602 or ITU V.25ter)
1 Fax class 1 (EIA/TIA-578-A, Service Class 1)
2 Fax class 2 (EIA/TIA SP-2388, an early draft version of
EIA/TIA-592-A Service class 2.1)
Reference
EIA/TIA-592-A
Note
Using Error Correcting Mode (ECM) when sending FAXes over GSM should be
avoided.
AT Command Set
MC35_ATC_01_V03.02 Page 43 of 228 13.03.2002
3.6 AT+FCQ Copy Quality Checking
Test command
AT+FCQ =?
This command controls Copy Quality checking when receiving a fax.
Response
(list of supported copy quality checking s)
OK
Parameter
See write command
Read command
AT+FCQ?
Response
OK
Parameter
See write command
Write command
AT+FCQ =
Response
OK
Parameter
0 No copy quality checking. The ME will generate Copy Qual-
ity OK (MCF) responses to complete pages.
1 ME can check 1-D phase data. The connected application
must check copy quality for 2-D phase C data
Reference
EIA PN-2388
Note
Used for for Faxclass 2 only.
3.7 AT+FCR Capability to receive
Write command
AT+FCR=
Response
OK
Parameter
0 ME will not receive message data. This can be used when
the application has insufficient storage. The ME can send
and can be polled for a file.
1 ME can receive message data.
Reference
EIA PN-2388
Note
Used for Faxclass 2 only
AT Command Set
MC35_ATC_01_V03.02 Page 44 of 228 13.03.2002
3.8 AT+FDCC Query or set capabilities
Test command
AT+FDCC =?
This command allows the connected application to sense and constrain the
capabilities of the facsimile DCE (=ME), from the choices defined in CCITT
T.30 Table 2.
Response
(list of s), (list of
s), (list of s), (list of s), (list of s),
(list of s), (list of s), (list of s)
OK
Parameter
VR: Vertical Resolution, BR: Bit Rate, WD: Page Width, LN: Page Length, DF:
Data Compression Format, EC: Error Correction Mode, BF: Binary File
Transfer Mode, ST: Scan Time/Line.
Note: For further information see AT+FDIS, pg. 46
Read command
AT+FDCC?
Response
OK
Parameter
See write command
Write command
AT+FDCC=,
,,,
,,,
Response
OK
Parameter
VR: Vertical Resolution, BR: Bit Rate, WD: Page Width, LN: Page Length, DF:
Data Compression Format, EC: Error Correction Mode, BF: Binary File
Transfer Mode, ST: Scan Time/Line.
Note: For further information see AT+FDIS, pg. 46
Reference
EIA PN-2388
Note
Used for Faxclass 2 only
AT Command Set
MC35_ATC_01_V03.02 Page 45 of 228 13.03.2002
3.9 AT+FDFFC Data Compression Format Conversion
Test command
AT+FDFFC=?
This parameter determines the ME response to a mismatch between the data
format negotiated for the facsimile session, reported by the +FDCS:DF sub-
parameter, and the Phase C data desired by the controlling application, indi-
cated by the optional +FDT:DF subparameter, or the +FDIS=DF subparameter
for the +FDR operation.
Response
(list of supported