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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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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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 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.

9.2219 AT+CXXCID AT^SCID

AT^SGAUTH

Both commands now independent of PIN authentication

Command added to list of PIN independent commands

9.1 - 9.1.19	204 - 218	Lists of result codes restructured.
9.4	223f	*# codes	Chapter revised. Further examples added.

9.4.1225f

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AT Command Set

1 Introduction

1.1Scope 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
AT+CALA, Chapter 4.2	Alarm mode and reminder call
	fully applicable

AT^SSYNC, Chapter 8.35 SYNC pin may be assigned different functions: <mode> 0 or 1.

MC35 Terminal

Does not support Alarm mode. Please ignore any information relating to the subject.

The reminder call can be used as described.

SYNC pin supports only <mode>=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, 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].

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1.2Supported 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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1.3Conventions

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).

1.4Supported 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	GSM character	Corresponding	ASCII	Hex
character	hex. value	ASCII character	Esc sequence	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.

1.5AT 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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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 current 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	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.

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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!

2.1A/ Repeat previous command line

Execute command Response

A/	Repeats previous command line. Line does not need to end with terminating
	character.
	Parameter
Reference	Note
V.25ter	• 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 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.

	Reference	Note:
	V.25ter	• To return from on-line command mode to on-line data mode: Enter ATO as de-
		scribed in Chapter 2.17.

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2.3AT\Qn Flowcontrol

Execute command Response

AT\Q<n> 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

Reference Note

Line state refers to RS-232 levels.

2.4ATA Answer a call

Execute command	TA causes remote station to go off-hook (e.g. answer call).
ATA	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<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
Reference	Note
V.25ter	See also AT+ATX and Chapter 9.1.5 for <text>

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2.5 ATD Mobile originated call to dial a number

Execute command

ATD[<n>]

[<mgsm][;]

Reference

V.25ter/GSM

07.07

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

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).

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2.6ATD><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

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		to called party)
	<;>	Only required to set up voice calls. TA remains in command mode.
Reference	Note
V.25ter/GSM	• There is no <mem> for emergency call (“EN”).

07.07• 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>.

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

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2.7ATD><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	TA attempts to set up an outgoing call to the stored number.
ATD><n>[<mgsm>][;]	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.

When TA returns to command mode after call release:

OK

Reference

V.25ter/GSM 07.07

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)

iDeactivates 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>.

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2.8ATD><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	TA attempts to set up an outgoing call to stored number
ATD><str>[mgsm][;]	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
	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 char-

acter 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)

iDeactivates CLIR (enables presentation of own phone number to called party)

<;> Only required to set up voice calls. TA remains in command mode.

Reference Note

V.25ter/GSM 07.07 Command is not supported for data calls! See also ATX and Chapter 9.1.5 for <text>

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2.9ATDI Mobile originated call to dialable ISDN number <n>

Execute command

ATDI<n>[;]

Reference

V.25ter

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<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

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2.10 ATDL Redial last telephone number used

Execute command

ATDL[;]

Reference

V.25ter

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

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.

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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	Note
V.25ter	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.

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2.13 ATI Display product identification information

Execute command	Response
ATI	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	Note
V.25ter

2.14 ATI[value] Display additional identification information

Execute command Response

ATI[value]	<value>=9 delivers the following information. Other values are not supported and
	only return OK.
	ATI9	SIEMENS Gipsy Soft Protocolstack V2.550
Reference	Note
V.25ter

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2.15 ATL Set monitor speaker loudness

Execute command	Response
ATL[val]	OK
Reference	Note
V.25ter	• 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.

2.16ATM Set monitor speaker mode

Execute command	Response
ATM[val]	OK
Reference	Note
V.25ter	• 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.

2.17ATO Switch from command mode to data mode

Execute command	Response
ATO[n]	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 <text>
	Note: <text> output only if +ATX parameter setting with value > 0.
	Parameter
	<n>	0 switch from command mode to data mode
Reference	Note
V.25ter

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2.18 ATQ Set result code presentation mode

Write command	Response
ATQ[<n>]	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	Response
ATP	OK
Reference	Note
V.25ter	No effect for GSM

2.20 ATS0 Set number of rings before automatically answering the call

Read command

ATS0?

Write command

ATS0=<n>

Reference

V.25ter

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

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.

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2.21 ATS3 Write command line termination character

Read command

ATS3?

Write command

ATS3=<n>

Reference

V.25ter

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

Note

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>

Reference

V.25ter

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

Note

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2.24 ATS6 Set pause before blind dialling

Read command

ATS6?

Write command

ATS6=<n>

Reference

V.25ter

Response

<n> OK

No effect for GSM

Response

OK

Parameter

<n> 000-255 number of seconds to wait before blind dialling.

Note

2.25 ATS7 Set number of seconds to wait for connection completion

Read command	Response
ATS7?	<n> OK
Write command	Specifies the number of seconds the TA will wait for the completion of the call
ATS7=<n>	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.
Reference	Note
V.25ter	• 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.

2.26ATS8 Set number of seconds to wait for comma dial modifier

Read command	Response
ATS8?	<n> OK
Write command	No effect for GSM
ATS8=<n>	Response
	OK
Reference	Note
V.25ter

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2.27 ATS10

Read command

ATS10?

Write command

ATS10=<n>

Set disconnect delay after indicating the absence of data carrier

Response

<n> OK

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	Response
ATS18?	<n> OK
Execute command	TA returns an extended report of the reason for the last call release and location.
ATS18=<n>
	<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
		9.1.6).
Reference	Note
Siemens	This command works for data calls only. For voice calls please use AT+CEER.

2.29 ATT Select tone dialling

Execute command	Response
ATT	OK
Reference	Note
V.25ter	No effect for GSM

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2.30 ATV Set result code format mode

Write command	Response
ATV[<value>]	This parameter setting determines the contents of the header and trailer transmit-
	ted 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	Note
V.25ter	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 Response

ATX[<value>]	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	Note
V.25ter	Related <text> see chapter 9.1.5.

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2.32 ATZ Set all current parameters to user defined profile

Execute command

ATZ[<value>]

Reference

V.25ter

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

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>]

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.
Reference	Note
V.25ter	Line state refers to RS-232 levels.

MC35_ATC_01_V03.02

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13.03.2002