Siemens MC35 User Manual

Siemens Cellular Engines

MC35 Module

MC35 Terminal

Version: 05.00

DocID: MC35_ATC_01_V05.00

AT Command Set

Document Name:	AT Command Set
	Siemens Cellular Engines
Version:	05.00
Date:	July 15, 2002
Doc Id:	MC35_ATC_01_V05.00
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 .............................................................................................				9
1	Introduction.................................................................................................				13
1.1	Scope of the document ...........................................................................................................				13
1.2	Supported product versions and related documents ..............................................................				14
1.3	Conventions ............................................................................................................................				15
1.4	AT command syntax ...............................................................................................................				15
1.4.1	Using parameters....................................................................................................................				15
1.4.2	Combining AT commands on the same command line ..........................................................				16
1.4.3	Entering successive AT commands on separate lines ...........................................................				16
1.5	Supported character sets ........................................................................................................				17
1.6	Flow control			.............................................................................................................................	18
1.6.1	Software flow control (XON/OFF flow control) ........................................................................				18
1.6.2	Hardware flow control (RTS/CTS flow control) .......................................................................				18
2	Standard V.25ter AT Commands ...............................................................				19
2.1	A/ Repeat previous command line .........................................................................................				19
2.2	+++ Switch from data mode or PPP online mode to command mode...................................				19
2.3	AT\Qn		Flow control ................................................................................................................		20
2.4	ATA Answer a call..................................................................................................................				20
2.5	ATD	Mobile originated call to dial a number ..........................................................................			21
2.6	ATD><mem><n> Originate call to phone number <n> in memory <mem> ..........................				23
2.7	ATD><n> Originate call to phone number selected from active memory..............................				25
2.8	ATD><str>			Originate call to phone number in memory with corresponding field ..................	26
2.9	ATDI	Mobile originated call to dialable ISDN number <n> ....................................................			27
2.10	ATDL Redial last telephone number used .............................................................................				28
2.11	ATE Enable command echo ..................................................................................................				29
2.12	ATH	Disconnect existing connection .....................................................................................			29
2.13	ATI Display product identification information........................................................................				30
2.14	ATI[value] Display additional identification information..........................................................				30
2.15	ATL Set monitor speaker loudness........................................................................................				31
2.16	ATM Set monitor speaker mode ............................................................................................				31
2.17	ATO Switch from command mode to data mode / PPP online mode....................................				31
2.18	ATQ	Set result code presentation mode................................................................................			32
2.19	ATP	Select pulse dialling .......................................................................................................			32
2.20	ATS0		Set number of rings before automatically answering the call ......................................		32
2.21	ATS3 Write command line termination character ..................................................................				33
2.22	ATS4		Set response formatting character...............................................................................		33
2.23	ATS5 Write command line editing character..........................................................................				33
2.24	ATS6		Set pause before blind dialling.....................................................................................		34
2.25	ATS7		Set number of seconds to wait for connection completion ..........................................		34
2.26	ATS8 Set number of seconds to wait for comma dial modifier..............................................				34
2.27	ATS10		Set disconnect delay after indicating the absence of data carrier .............................		35
2.28	ATS18		Extended error report.................................................................................................		35
2.29	ATT Select tone dialling .........................................................................................................				35
2.30	ATV Set result code format mode..........................................................................................				36
2.31	ATX Set CONNECT result code format and call monitoring..................................................				36
2.32	ATZ Set all current parameters to user defined profile ..........................................................				37
2.33	AT&C		Set circuit Data Carrier Detect (DCD) function mode..................................................		37
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2.34	AT&D Set circuit Data Terminal Ready (DTR) function mode...............................................				38
2.35	AT&F Set all current parameters to manufacturer defaults ...................................................				39
2.36	AT&S	Set circuit Data Set Ready (DSR) function mode........................................................			41
2.37	AT&V	Display current configuration .......................................................................................			42
2.38	AT&W	Store current configuration to user defined profile .....................................................			43
2.39	AT+GCAP		Request complete TA capabilities list ..................................................................		44
2.40	AT+GMI Request manufacturer identification........................................................................				44
2.41	AT+GMM Request TA model identification............................................................................				44
2.42	AT+GMR		Request TA revision identification of software status ............................................		45
2.43	AT+GSN Request TA serial number identification(IMEI).......................................................				45
2.44	AT+ILRR Set TE-TA local rate reporting ................................................................................				46
2.45	AT+IPR Set fixed local rate.....................................................................................................				47
2.45.1	Autobauding			............................................................................................................................	48
3	AT Commands for FAX...............................................................................				49
3.1	AT+FBADLIN Bad Line Treshold...........................................................................................				49
3.2	AT+FBADMUL Error Threshold Multiplier..............................................................................				50
3.3	AT+FBOR Query data bit order .............................................................................................				50
3.4	AT+FCIG		Query or set the Local polling id ............................................................................		51
3.5	AT+FCLASS			Fax: Select, read or test service class .............................................................	51
3.6	AT+FCQ Copy Quality Checking ...........................................................................................				52
3.7	AT+FCR Capability to receive................................................................................................				52
3.8	AT+FDCC Query or set capabilities.......................................................................................				53
3.9	AT+FDFFC Data Compression Format Conversion..............................................................				54
3.10	AT+FDIS Query or set session parameters...........................................................................				55
3.11	AT+FDR Begin or continue phase C data reception..............................................................				56
3.12	AT+FDT Data Transmission ..................................................................................................				56
3.13	AT+FET End a page or document .........................................................................................				57
3.14	AT+FK	Kill operation, orderly FAX abort................................................................................			57
3.15	AT+FLID Query or set the Local Id setting capabilities .........................................................				57
3.16	AT+FMDL Identify Product Model..........................................................................................				58
3.17	AT+FMFR		Request Manufacturer Identification ....................................................................		58
3.18	AT+FOPT		Set bit order independently...................................................................................		58
3.19	AT+FPHCTO DTE Phase C Response Timeout ...................................................................				59
3.20	AT+FREV		Identify Product Revision......................................................................................		59
3.21	AT+FRH Receive Data Using HDLC Framing .......................................................................				59
3.22	AT+FRM Receive Data ..........................................................................................................				60
3.23	AT+FRS Receive Silence ......................................................................................................				60
3.24	AT+FTH Transmit Data Using HDLC Framing ......................................................................				60
3.25	AT+FTM Transmit Data .........................................................................................................				61
3.26	AT+FTS Stop Transmission and Wait ...................................................................................				61
3.27	AT+FVRFC			Vertical resolution format conversion .................................................................	62
4	AT Commands originating from GSM 07.07 .............................................				63
4.1	AT+CACM Accumulated call meter (ACM) reset or query ....................................................				63
4.2	AT+CALA Set alarm time.......................................................................................................				64
4.3	AT+CAMM Accumulated call meter maximum (ACMmax) set or query................................				67
4.4	AT+CAOC Advice of Charge information ..............................................................................				68
4.5	AT+CBST		Select bearer service type ....................................................................................		69
4.6	AT+CCFC Call forwarding number and conditions control....................................................				70
4.6.1	Examples: Call forwarding ......................................................................................................				71
4.7	AT+CCLK Real Time Clock ...................................................................................................				73
4.8	AT+CCUG: Closed User Group ..............................................................................................				74
4.9	AT+CCWA Call waiting ..........................................................................................................				75
4.10	AT+CEER Extended error report ...........................................................................................				77
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4.11	AT+CFUN		Set phone functionality.........................................................................................		78
4.11.1	Wake up the ME from SLEEP mode.......................................................................................				81
4.12	AT+CGMI Request manufacturer identification ......................................................................				82
4.13	AT+CGMM Request model identification...............................................................................				82
4.14	AT+CGMR		Request revision identification of software status ...............................................		82
4.15	AT+CGSN		Request product serial number identification (IMEI) identical to GSN ................		83
4.16	AT+CHLD Call hold and multiparty.........................................................................................				83
4.17	AT+CHUP Hang up call .........................................................................................................				84
4.18	AT+CIMI Request international mobile subscriber identity....................................................				84
4.19	AT+CIND Indicator control ......................................................................................................				85
4.20	AT+CLCC		List current calls of ME .........................................................................................		87
4.21	AT+CLCK		Facility lock ...........................................................................................................		88
4.21.1	Examples: Enabling / disabling PIN 1 authentication .............................................................				90
4.21.2	Examples: Phone lock.............................................................................................................				91
4.21.3	Examples: Call barring ............................................................................................................				93
4.22	AT+CLIP	Calling line identification presentation....................................................................			94
4.23	AT+CLIR	Calling line identification restriction (by *# sequence) ...........................................			95
4.24	AT+CLVL Loudspeaker volume level ....................................................................................				96
4.25	AT+CMEE Report mobile equipment error ............................................................................				97
4.26	AT+CMER Mobile equipment event reporting .......................................................................				98
4.27	AT+CMUT Mute control .......................................................................................................				100
4.28	AT+CMUX Enter multiplex mode.........................................................................................				101
4.28.1	Restricted use of AT commands in Multiplex mode..............................................................				102
4.29	AT+COPN Read operator names ........................................................................................				104
4.30	AT+COPS Operator selection..............................................................................................				105
4.31	AT+CPAS		Mobile equipment activity status ........................................................................		107
4.32	AT+CPBR Read current phonebook entries........................................................................				108
4.33	AT+CPBS Select phonebook memory storage....................................................................				109
4.34	AT+CPBW Write phonebook entry			......................................................................................	110
4.35	AT+CPIN Enter PIN .............................................................................................................				111
4.35.1	What to do if PIN or password authentication fails? .............................................................				114
4.36	AT+CPIN2 Enter PIN2 .........................................................................................................				116
4.37	AT+CPUC Price per unit and currency table .......................................................................				118
4.38	AT+CPWD Change password .............................................................................................				119
4.39	AT+CR Service reporting control .........................................................................................				122
4.40	AT+CRC	Set Cellular Result Codes for incoming call indication.........................................			123
4.41	AT+CREG Network registration...........................................................................................				124
4.42	AT+CRLP		Select radio link protocol param. for orig. non-transparent data call..................		126
4.43	AT+CRSM Restricted SIM access.......................................................................................				127
4.44	AT+CSCS Set TE character set...........................................................................................				128
4.45	AT+CSNS Single Numbering Scheme ................................................................................				129
4.46	AT+CSQ	Signal quality ........................................................................................................			130
4.47	AT+CSSN		Supplementary service notifications...................................................................		131
4.48	AT+CUSD Unstructured supplementary service data .........................................................				132
4.49	AT+VTD=<n> Tone duration................................................................................................				133
4.50	AT+VTS DTMF and tone generation (<Tone> in {0-9, *, #, A, B, C, D}) .............................				133
4.51	AT+WS46 Select wireless network .......................................................................................				134
5	AT commands originating from GSM 07.05 for SMS .............................				135
5.1	AT+CMGC Send an SMS command ...................................................................................				135
5.2	AT+CMGD Delete SMS message........................................................................................				136
5.3	AT+CMGF Select SMS message format .............................................................................				136
5.4	AT+CMGL List SMS messages from preferred store ..........................................................				137
5.5	AT+CMGR Read SMS message .........................................................................................				140
5.6	AT+CMGS Send SMS message..........................................................................................				143
5.7	AT+CMGW Write SMS message to memory.......................................................................				145
5.8	AT+CMSS Send SMS message from storage.....................................................................				147
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5.9	AT+CNMA New SMS message acknowledge to ME/TE, only phase 2+ ............................				148
5.10	AT+CNMI New SMS message indications ..........................................................................				149
5.11	AT+CPMS Preferred SMS message storage ......................................................................				152
5.12	AT+CSCA SMS service centre address ..............................................................................				154
5.13	AT+CSCB Select cell broadcast messages.........................................................................				155
5.14	AT+CSDH Show SMS text mode parameters .....................................................................				156
5.15	AT+CSMP Set SMS text mode parameters.........................................................................				157
5.16	AT+CSMS Select Message Service ....................................................................................				158
6	GPRS AT commands in accordance with GSM 07.07............................				159
6.1	Commands specific to MTs supporting GPRS .....................................................................				159
6.1.1	AT+CGATT GPRS attach and detach .................................................................................				159
6.1.2	AT+CGACT PDP context activate or deactivate..................................................................				160
6.1.3	AT+CGDATA Enter data state .............................................................................................				161
6.1.4	AT+CGDCONT Define PDP Context...................................................................................				162
6.1.5	AT+CGQMIN		Quality of Service Profile (Minimum acceptable) ..........................................		164
6.1.6	AT+CGQREQ		Quality of Service Profile (Requested).........................................................		168
6.1.7	AT+CGSMS Select service for MO SMS messages ...........................................................				172
6.1.8	AT^SGAUTH		Set type of authentication for PPP connection .............................................		173
6.2	Modem compatibility commands to MTs supporting GPRS .................................................				174
6.3	ATD *99# Request GPRS service .......................................................................................				174
6.3.1	ATD *98# Request GPRS IP service ..................................................................................				175
6.3.2	ATH Manual rejection of a network request for PDP context activation ..............................				176
6.4	Using GPRS AT commands (examples)...............................................................................				177
6.4.1	Miscellaneous AT commands ...............................................................................................				177
6.5	Using the GPRS dial command ATD ....................................................................................				179
7	AT Commands for SIM Application Toolkit (GSM 11.14).......................				180
7.1	AT^SSTA Remote-SAT Interface Activation.........................................................................				181
7.2	^SSTN Remote-SAT Notification ..........................................................................................				182
7.3	AT^SSTGI Remote-SAT Get Information .............................................................................				183
7.4	AT^SSTR Remote-SAT Response .......................................................................................				184
8	Siemens defined AT commands for enhanced functions .....................				185
8.1	AT+CXXCID Display card ID (identical to AT^SCID)...........................................................				185
8.2	AT^MONI Monitor idle mode and dedicated mode..............................................................				186
8.3	AT^MONP Monitor neighbour cells......................................................................................				188
8.4	AT^SACM Advice of charge and query of ACM and ACMmax ...........................................				189
8.5	AT^SBC Battery charging / discharging and charge control................................................				190
8.6	AT^SCID	Display SIM card identification number................................................................			193
8.7	AT^SCKS Set SIM connection presentation mode and query SIM connection status ........				194
8.8	AT^SCNI	List Call Number Information ...............................................................................			195
8.9	AT^SCTM	Set critical operating temperature presentation mode or query temperature.....			196
8.10	AT^SDLD Delete the “last number redial“ memory..............................................................				198
8.11	AT^SHOM Display Homezone.............................................................................................				198
8.12	AT^SLCD Display Last Call Duration...................................................................................				198
8.13	AT^SLCK	Facility lock..........................................................................................................			199
8.14	AT^SMGL List SMS messages from preferred storage.......................................................				201
8.15	AT^SMGO Set or query SMS overflow presentation mode or query SMS overflow ...........				202
8.16	AT^SMSO	Switch off mobile station ....................................................................................			203
8.17	AT^SMGR Read SMS message without set to REC READ................................................				203
8.18	AT^SM20 Set M20 Compatibility .........................................................................................				204
8.19	AT^SNFA Set or query microphone attenuation..................................................................				205
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8.20	AT^SNFD	Set audio parameters to manufacturer default values........................................	206
8.21	AT^SNFI Set microphone path parameters .........................................................................		207
8.22	AT^SNFM Mute microphone................................................................................................		208
8.23	Audio programming model....................................................................................................		208
8.24	AT^SNFO	Set audio output (= loudspeaker path) parameter..............................................	209
8.25	AT^SNFPT	Call progress tones ..........................................................................................	210
8.26	AT^SNFS Select audio hardware set...................................................................................		211
8.27	AT^SNFV Set loudspeaker volume......................................................................................		212
8.28	AT^SNFW	Write audio setting in non-volatile store .............................................................	212
8.29	AT^SPBC	Search the first entry in the sorted telephone book ............................................	213
8.30	AT^SPBG	Read entry from active telephone book via sorted index ...................................	214
8.31	AT^SPBS Steps the selected phonebook alphabetically.....................................................		215
8.32	AT^SPIC Display PIN counter..............................................................................................		216
8.33	AT^SPLM Read the PLMN list .............................................................................................		217
8.34	AT^SPLR Read entry from the preferred operators list .......................................................		218
8.35	AT^SPLW	Write an entry to the preferred operators list......................................................	219
8.36	AT^SPWD Change password for a lock ..............................................................................		220
8.37	AT^SRTC	Select, query, test ring tone parameters.............................................................	222
8.38	AT^SSCONF SMS Configuration........................................................................................		224
8.39	AT^SSDA	Set Display Availability.......................................................................................	225
8.40	AT^SSYNC Configure SYNC Pin.........................................................................................		226
8.41	AT^STCD Display Total Call Duration .................................................................................		228
9	APPENDIX .................................................................................................		229
9.1	Summary of ERRORS and Messages..................................................................................		229
9.1.1	Summary of CME ERRORS related to GSM 07.07..............................................................		229
9.1.2	Summary of GPRS-related CME ERRORS..........................................................................		230
9.1.3	Summary of CMS ERRORS related to GSM 07.05..............................................................		231
9.1.4	Summary of Unsolicited Result Codes (URC) ......................................................................		234
9.1.5	Result codes .........................................................................................................................		237
9.1.6	Cause Location ID for the extended error report (AT+CEER) ..............................................		237
9.1.7	GSM release cause for L3 Radio Resource (RR) (AT+CEER) ...........................................		238
9.1.8	SIEMENS release cause for L3 Radio Resource (RR) (AT+CEER) ...................................		238
9.1.9	GSM release cause for Mobility Management (MM) (AT+CEER) ........................................		239
9.1.10	SIEMENS release cause for L3 Mobility Management (MM) (AT+CEER) ...........................		240
9.1.11	GSM release cause for L3 Call Control (CC) (AT+CEER) ...................................................		240
9.1.12	SIEMENS release cause for L3 Call Control (CC) (AT+CEER) ...........................................		241
9.1.13	SIEMENS release cause for L3 Advice of Charge (AOC) (AT+CEER) ...............................		242
9.1.14	GSM release cause for Supplementary Service call (AT+CEER) ........................................		242
9.1.15	Siemens release cause for Call related Supplementary Services (CRSS) (AT+CEER) ....		243
9.1.16	GSM release cause for Session Management (SM) (AT+CEER) ........................................		243
9.1.17	SIEMENS release cause for Session Management (SM) (AT+CEER) ................................		244
9.1.18	SIEMENS release cause for GPRS API (AT+CEER) ..........................................................		244
9.1.19	SIEMENS release cause for Embedded Netcore (AT+CEER)...........................................		245
9.2	Summary of PIN requiring AT Commands............................................................................		246
9.3	AT commands available before entering the SIM PIN..........................................................		248
9.4	Standard GSM service codes ...............................................................................................		250
9.4.1	Additional notes on ^SCCFC, ^SCCWA, ^SCLCK ...............................................................		252
9.5	GSM and UCS2 alphabet tables...........................................................................................		254

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Figures
Figure 1: AT audio programming model...............................................................................................	208
Tables
Table 1: Product specific use of AT commands.....................................................................................	13
Table 2: Types of AT commands and responses...................................................................................	15
Table 3: Illegal combinations of AT commands .....................................................................................	16
Table 4: Character definitions depending on alphabet (examples)........................................................	17
Table 5: Factory settings ........................................................................................................................	39
Table 6: Summary of AT commands available in Alarm mode ..............................................................	66
Table 7: Wake-up events in NON-CYCLIC and CYCLIC SLEEP mode ................................................	81
Table 8: Availability of AT commands on virtual channels ...................................................................	102
Table 9: Summary of AT commands with different behaviour in Multiplex mode ...............................	103
Table 10: Timing algorithm of incorrect password input.......................................................................	114
Table 11: Summary of AT commands available in Charge-only and Alarm mode ..............................	192
Table 12: Operating modes of the ME indicated by status LED (if <mode> = 1):................................	227
Table 13: Summary of URCs................................................................................................................	234
Table 14: Summary of Fax Class 2 URCs defined by EIA PN-2388 ...................................................	236
Table 15: GSM service codes ..............................................................................................................	250

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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_V04.00 => MC35-ATC_01_V05.00

	Chapter	Page	AT command		What is new
	1.5	17	Character sets		Chapter revised and associated character set tables
					in Chapter 9.5 updated.
	1.6	18	Flow control		How to use flow control.
	2.3	20	AT\Q<n>		Further details added: Using RTS/CTS handshake.
					Restoring AT\Q settings.
	2.12	29	ATH		Notes on Multiplex mode and GPRS operation cor-
					rected
	2.35	39	AT&F		Added further commands to list of factory settings
	2.45	47	AT+IPR		Added note on minimum bit rate.
	4.6	70	AT+CCFC		Added note on applicability of <class> according to
					GSM02.04.
	4.9	75	AT+CCWA		AT+CHLD can be used to put an active call on hold an
					accept a waiting voice call. Not for data or fax calls.
					Added notes on applicability of different <class>es.
	4.11	78	AT+CFUN		Chapter revised.
	4.16	83	AT+CHLD		Removed note on GPRS.
					Added notes: AT+CHLD for voice calls only. Further
					information on Call Waiting.
	4.19	85	AT+CIND		Revised Chapter.
	4.21	88	AT+CLCK		Corrected description of “FD” lock: PIN2 is requested
	8.13	199	AT^SLCK		as password (it is not sufficient to have done PIN2 au-
					thentication before).
					Added notes on applicability of different <class>es
					and <fac>s.
	4.21.2	91	AT+CLCK		Modified examples.
	4.24	96	AT+CLVL		Added information on related AT commands
					AT^SNF0, AT^SNFV, AT^SNFS
	4.26	98	AT+CMER		Revised Chapter.
	4.27	100	AT+CMUT		Added information on related AT commands
					AT^SNF0, AT^SNFM, AT^SNFS
	4.28.1	102f	AT+CMUX		AT\Q3 (hardware flow control) is recommended.
					Notes regarding execution of ATH on different chan-
					nels corrected.
	4.36	116	AT+CPIN2		Added more details on validity of CPIN2 authentica-
					tion.
	4.44	128	AT+CSCS		Further details added: Using RTS/CTS handshake.
					Restoring AT\Q settings.
	4.49	133	AT+VTD		Revised chapters.
	4.50	133	AT+VTS
	5.4	137	AT+CMGL		Removed all information on CB messages.
	5.5	140	AT+CMGR		Added note regarding AT^SSCONF.
	5.7	145	AT+CMGW		Parameter <length> corrected (only required for PDU,
					not for text mode).
					Result code after failure of storing a message to the
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			SIM card (ME returns OK or ERROR depending on
			setting of AT^SM20).
			Statement about sending e-mails via SMS corrected:
			If not recognized by provider, @ may be replaced with
			“*”.
5.10	149	AT+CNMI	Notes regarding AT^SSCONF and AT^SMGO added.
			Note regarding the handling of Class 0 short mes-
			sages added.
5.11	152	AT+CPMS	<mem3> now offers the choice between “MT” and
			“SM”
			<mem1>, <mem2> and <mem3> are now stored non-
			volatile.
			Added notes on handling <mem3>.
6.1.7	172	AT+CGSMS	Modified parameter <service>=2 (GPRS preferred):
			No SMS via GPRS during a circuit switched call.
6.1.8	173	AT^SGAUTH	Notes added: Parameter cannot be stored with
			AT&W. Default value after power-up is <auth>=3
			(PAP and CHAP).
6.3.2	176	ATH	Notes on deactivation of PDP context and GPRS con-
			nection removed.
8.2	186f	AT^MONI	Response example b): Parameter C1 corrected.
			<chann> and <rs> explained in greater detail
			References for 3GPP TS 05.05 and 05.08 added
			Notes modified:
			If the radio cell changes during a connection, the pa-
			rameters PWR and RXLev of the ‘Serving Cell’ part
			will not be updated, and updating the Cell ID takes 1
			or 2 seconds.
8.3	188	AT^MONP	<chann> and <rs> explained in greater detail
			Notes modified: During a connection new neighbour
			cells can be added, but their parameters C1 and C2
			will be updated after the call.
8.15	202	AT^SMGO	Added note: Indication of URC requires
			AT+CNMI=3,1. SMS indication during data transfer
			via Break (100ms)
8.19 - 8.28	205 - 212	AT^SNF…	All Chapters revised.
8.25	210	AT^SNFPT	New AT command: Call progress tones
8.37	222	AT^SRTC	New AT command: Select, query, test ringing tones
8.38	224	AT^SSCONF	New AT command: Configuring recipient address pa-
			rameters in SMS result codes and in +CDS URCs.
9.1.3	231	CMS errors	Note and example added: Mapping of CME and CMS
			errors if SIM PIN authentication has not been done.
9.1.4	234	URCs	Added: URCs will be output after command execution.
			Added list of Fax Class 2 URCs.
9.1.5	237	Result codes	Removed 3 result codes “CONNECT…”, and pre-
			served those wich include “CONNECT …/RLP”
		Added to List of PIN1 requiring AT commands:
		AT+CPIN2, AT^SSDA
9.3	248f	Added to List of PIN1 independent AT commands:
		AT+VTS, AT^SNFPT, AT^SRTC, AT^SSCONF

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"AT Command Set" Version MC35-ATC_01_V03.02 => MC35-ATC_01_V04.00

Chapter	Page	AT command	What is new
2.2	19	+++	Chapter revised.
2.5	21	ATD	Parameters “G” and “g” for Closed User Group added.
2.17	31	ATO	Chapter revised.
4.8	74	AT+CCUG	New AT command: Closed User Group.
4.9	75	AT+CCWA	New AT command: Call Waiting.
4.19	85	AT+CIND	New AT command: Indicator control.
4.21	88	AT+CLCK	Under parameter “PS” lock, the following statement
			has been removed: “ME may remember numbers of
			previously used cards.”
4.26	98	AT+CMER	New AT command: Mobile equipment event reporting.
8.2	186f	AT^MONI	Statement regarding RING line revised.
8.3	188	At^MONP
8.19	205	AT^SNFA	New AT command: Set or query microphone attenua-
			tion
8.39	225	AT^SSDA	New AT command: Set Display Availability
9.1.4	234	+CIEV: <text> added to list of URCs
9.2 - 9.3	246f - 248f	AT+CCUG,	Added to Chapter 9.2 (PIN 1 required).
		AT+CCWA,
		AT+CMER,
		AT^SSDA
		AT+CIND	Added to Chapter 9.3 (PIN1 independent)
		AT^SNFA

"AT Command Set" Version MC35-ATC_01_V02.00 => MC35_ATC_01_V03.02

	Chapter	Page	AT command		What is new
	1.4.2	16	Note regarding sequential order of concatenated commands added.
	4.5	69	AT+CBST		Command syntax corrected: Parameter <speed> is
					mandatory.
	4.6	70	AT+CCFC		New <class> parameters added.
	4.11	78	AT+CFUN		SLEEP mode described in greater detail
	4.21	88	AT+CLCK		New <class> parameters added.
	4.35.1	114	AT+CPIN		Timing algorithm of incorrect password corrected
	4.46	130	AT+CSQ		Note added: Realistic BER values can be obtained
					only if there is a call in progress.
	5.11	152	AT+CPMS		Difference between SM, ME and MT storage ex-
					plained.
	6.1.8	173	AT^SGAUTH		New command to specify protocol for PPP authentica-
					tion
	8.2	186f	AT^MONI		Channel numbers are now issued in the form of 4-digit
					numbers. Therefore, the examples on page 186 have
					been updated.
					Frequency hopping will now be indicated with “h” (in-
					stead of the previously used “0”.
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			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	194	AT^SCKS	Notes regarding empty SIM card tray modified.
8.9	196	AT^SCTM	Chapter revised due to improved presentation of tem-
			perature shutdown URCs.

9.2 - 9.3 246f - 248f 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	229 - 245f	Lists of result codes restructured.
9.1.12	241	Notification number 300 added: “Called party barred incoming call”
9.4	250f	*# codes	Chapter revised. Further examples added.

9.4.1252f

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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 8.40 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 05.00

Related documents

[1]MC35 Hardware Interface Description, Version 05.00

[2]Release Notes: MC35, Version 05.00

[3]MC35 GPRS Startup User's Guide

[4]MC35 Remote-SAT User's Guide, as of Version 05.00

[5]MC35 Multiplexer User's Guide, Version 05.00

[6]Application Note 16: Updating MC35 Firmware, as of Version 05.00

[7]MC35 Terminal Hardware Interface Description

[8]TC35 MC35 Terminal User's Guide

[9]Application Note 02: Audio Interface Design

[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 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).

1.4AT 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 2: 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.

1.4.1 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.

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1.4.2 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 3: 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.

1.4.3 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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1.5Supported character sets

The ME supports two character sets: GSM 03.38 (7 bit, also referred to as SMS alphabet) and UCS2 (16 bit, refer to ISO/IEC 10646). See Chapter 4.44 for information about selecting the character set. Character tables are provided in Chapter 9.5.

Due to the constraints described below it is recommended to prefer the USC2 alphabet in any external application.

If the GSM alphabet is selected all characters sent over the serial line are in the range from 0 ... 127.

CAUTION: GSM alphabet is not ASCII alphabet!

Several problems resulting from the use of the GSM alphabet:

1."@" character with GSM alphabet value 0 is not printable by an ASCII terminal program (e.g. Microsoft© Hyperterminal®).

2."@" character with GSM alphabet value of binary 0 will terminate any C string!

This is because the \0 is defined as C string end tag. Therefore, the GSM Null character may cause problems on application level when using a ´C´-function as „strlen()“. This can be avoided if it is represented by an escape sequence as shown in Table 4.

By the way, this may be the reason why even network providers often replace "@"with “@=*” in their SIM application.

3.Other characters of the GSM alphabet are misinterpreted by an ASCII terminal program. For example, GSM "ö" (as in "Börse") is assumed to be "|" in ASCII, thus resulting in "B|rse". This is because both alphabets mean different characters with values hex. 7C or 00 and so on.

4.In addition, decimal 17 and 19 which are used as XON/XOFF control characters when software flow control is activated, are interpreted as normal characters in the GSM alphabet.

When you 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 can be presented. Any ASCII terminal then will show wrong responses.

Table 4: 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	NULL	\00	5C	30	30

CAUTION: Often, the editors of terminal programs do not recognize escape sequences. In this case, an escape sequence will be handled as normal characters. The most common workaround to this problem is to write a script which includes a decimal code instead of an escape sequence. This way you can write, for example, short messages which may contain differently coded characters.

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1.6Flow control

Flow control is essential to prevent loss of data or avoid errors when, in a data or fax call, the sending device is transferring data faster than the receiving side is ready to accept. When the receiving buffer reaches its capacity, the receiving device should be capable to cause the sending device to pause until it catches up.

There are basically two approaches to regulate data flow: software flow control and hardware flow control. The High Watermark of the input / output buffer should be set to approximately 60% of the total buffer size. The Low Watermark is recommended to be about 30%. The data flow should be stopped when the capacity rises close to the High Watermark and resumed when it drops below the Low Watermark. The time required to cause stop and go results in a hysteresis between the High and Low Watermarks.

In Multiplex mode, it is recommended to use hardware flow control. For details please refer to [5].

1.6.1 Software flow control (XON/OFF flow control)

Software flow control sends different characters to stop (XOFF, decimal 19) and resume (XON, decimal 17) data flow. The only advantage of software flow control is that three wires would be sufficient on the serial interface.

1.6.2 Hardware flow control (RTS/CTS flow control)

Hardware flow control sets or resets the RTS/CTS wires. This approach is faster and more reliable, and therefore, the better choice. When the High Watermark is reached, CTS is set inactive until the transfer from the buffer has completed. When the Low Watermark is passed, CTS goes active once again.

To achieve smooth data flow, ensure that the RTS/CTS lines are present on your application platform. The application should include options to enable RTS/CTS handshake with the GSM engine. This needs to be done with the AT command AT\Q3 - it is not sufficient to set RTS/CTS handshake in the used Terminal program only.

The default setting of the GSM engine is AT\Q0 (no flow control) which must be altered to AT\Q3 (RTS/CTS hardware handshake on). The setting is stored volatile and must be restored each time after the GSM engine was switched off. For further details refer to Chapter 2.3.

AT\Q has no read command. To verify the current setting of AT\Q, simply check the settings of the active profile with AT&V.

Often, fax programs run an intialization procedure when started up. The intialization commonly includes enabling RTS/CTS hardware handshake, eliminating the need to set AT\Q3 once again. However, before setting up a CSD call, you are advised to check that RTS/CTS handshake is set.

RTS/CTS hardware handshake must also be set if you want to take advantage of the CYCLIC SLEEP modes. For further details refer to Chapter 4.11, AT+CFUN.

Note: After deactivating the RTS line, the ME may still send up to 32 bytes. This can be easily handled if the buffer of the host application is sufficiently sized, and if a hysteresis is implemented in its Rx buffer as mentioned in Chapter 1.6. A total buffer capacity of 256 bytes has been proved to work well.

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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. 46) A/ (and a/) cannot be used.

2.2+++ Switch from data mode or PPP online mode to command mode

Execute command Response

+++This command is only available during a CSD call or a GPRS connection. 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 or, accordingly, the GPRS connection.

			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 command mode to data or PPP online mode: Enter ATO as de-
			scribed in Chapter 2.17.

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2.3 AT\Qn Flow control

Execute command

AT\Q<n>

Response

OK

Parameter

<n>	0	AT\Q0	No flow control
	1	AT\Q1	XON/XOFF software flow control
	2	AT\Q2	Only CTS by DCE
	3	AT\Q3	RTS/CTS hardware flow control
			Required for the following procedures: incoming

or outgoing data calls, fax calls, GPRS connections, CYCLIC SLEEP modes set with AT+CFUN. Often, the initialization routine of Fax programs includes enabling RTS/CTS handshake, eliminating the need to issue AT\Q3 once again.

Reference Note

Line state refers to RS-232 levels.

The setting of AT\Q is stored volatile and must be restored each time after the GSM engine was switched off. Also, there is no way to store AT\Q to the user defined profile.

See also Chapter 1.6 for general information on flow control.

2.4 ATA Answer a call

Execute command

ATA

Reference

V.25ter

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<text> TA switches to data mode.

Note: <text> output only if +ATX parameter setting with value > 0.

Response in case of voice call, if successfully connected:

OK

When TA returns to command mode after call release:

OK

Response if no connection:

NO CARRIER

Parameter

Note

See also AT+ATX and Chapter 9.1.5 for <text>

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2.5 ATD Mobile originated call to dial a number

Execute command

ATD[<n>]

[<mgsm][;]

This command can be used to set up outgoing voice, data or fax calls. It also serves to control supplementary services.

Note:

The command may be aborted generally when receiving an ATH command during execution. It can´t be aborted in some connection setup states, such as handshaking.

Two different call setup options can be determined for voice calls: TA returns OK either after dialing was completed or after call has been established. Setting is made with AT^SM20 (see Chapter 8.18). In data connections, call setup always 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)

G Activate Closed User Group explicit invocation for this call only.

g Deactivate Closed User Group explicit invocation for this call only. <;> Only required to set up voice calls. TA remains in command mode.

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Reference	Note
V.25ter/GSM	Before setting up a data call, check that RTS/CTS handshake is enabled. See
07.07	Chapters 1.6 and 2.3.
	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. 132).
	Parameter ‘G’ or ‘g’ will be ignored if Closed User Group was already activated,
	or accordingly, deactivated with AT+CCUG command.

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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 4.32).

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 dialed 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.

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	<mgsm>	I	Activates CLIR (disables presentation of own phone number to
			called party)
		i	Deactivates CLIR (enables presentation of own phone number
			to called party)
	<;>	Only required to set up voice calls. TA remains in command mode.
Reference	Note
V.25ter/GSM	There is no <mem> for emergency call (“EN”).

07.07Command 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
	location 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 4.33). 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 4.32).

	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
		If successfully connected and voice call:
		OK
		Parameter
		<n>	integer type memory location should be in the range of locations
			available in the memory used, i.e. the index number returned by
			AT+CPBR.
		<mgsm>	I Activates CLIR (disables presentation of own phone number to
			called party)
			i Deactivates CLIR (enables presentation of own phone number
			to called party)
		<;>	Only required to set up voice calls. TA remains in command mode.
	Reference	Note
	V.25ter/GSM 07.07	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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AT Command Set

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 AT+CSCS. <str> can contain escape sequences as described in Chapter 1.5.

<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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AT Command Set

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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AT Command Set

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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AT Command Set

2.11 ATE Enable command echo

Write command

ATE[<value>]

This setting determines whether or not the TA echoes characters received from TE during command state.

Response

OK

Parameter

<value> 0 Echo mode off 1 Echo mode on

Reference	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, fax or CSD calls. See notes below for GPRS and multiplex mode.

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 voice, fax or CSD call, no matter on which channel ATH was executed.

For example, if ATH is executed on channel 2 or 3, a voice call made on channel 1 will be disconnected, too.

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 during Multiplex mode:

ATH clears an active PDP context or terminates an existing PPP connection, but only if issued on the same logical channel where GPRS is used. It does not affect PDP contexts and PPP connections on other channels.

See also Chapter 6.3.2, ATH Manual rejection of a network request for PDP context activation.

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AT Command Set

2.13 ATI Display product identification information

Execute command Response

ATI

ME issues product information text

SIEMENS

MC35

REVISION xx.yy

OK

Explanation of “Revision“ parameter:

Version xx and variant yy of software release.

Reference Note

V.25ter

2.14 ATI[value] Display additional identification information

Execute command 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
		MC35
Reference	Note

V.25ter

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