Siemens MC55 User Manual

mobile

MC55

Siemens Cellular Engine

Version: 01.05

DocId: MC55_ATC_V01.05

MC55 AT Command Set

s

mobile

Document Name:	MC55 AT Command Set
Version:	01.05
Date:	February 10, 2004
DocId:	MC55_ATC_V01.05
Status	Confidential / Released

General Notes

Product is deemed accepted by recipient and is provided without interface to recipient’s products. The documentation and/or product are provided for testing, evaluation, integration and information purposes. The documentation and/or product are provided on an “as is” basis only and may contain deficiencies or inadequacies. The documentation and/or product are provided without warranty of any kind, express or implied. To the maximum extent permitted by applicable law, Siemens further disclaims all warranties, including without limitation any implied warranties of merchantability, completeness, fitness for a particular purpose and non-infringement of thirdparty rights. The entire risk arising out of the use or performance of the product and documentation remains with recipient. 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. 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. Siemens or its suppliers shall, regardless of any legal theory upon which the claim is based, not be liable for any consequential, incidental, direct, indirect, punitive or other damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information or data, or other pecuniary loss) arising out the use of or inability to use the documentation and/or product, even if Siemens has been advised of the possibility of such damages. The foregoing limitations of liability shall not apply in case of mandatory liability, e.g. under the German Product Liability Act, in case of intent, gross negligence, injury of life, body or health, or breach of a condition which goes to the root of the contract. However, claims for damages arising from a breach of a condition, which goes to the root of the contract, shall be limited to the foreseeable damage, which is intrinsic to the contract, unless caused by intent or gross negligence or based on liability for injury of life, body or health. The above provision does not imply a change on the burden of proof to the detriment of the recipient. Subject to change without notice at any time. The interpretation of this general note shall be governed and construed according to German law without reference to any other substantive law.

Copyright

Transmittal, reproduction, dissemination and/or editing of this document as well as utilization of its contents and communication thereof to others without express authorization are prohibited. Offenders will be held liable for payment of damages. All rights created by patent grant or registration of a utility model or design patent are reserved.

Copyright © Siemens AG February 10, 2004

MC55_ATC_V01.05	Page 2 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

Contents

1.	Introduction............................................................................................................................................			13
	1.1	Scope of the document .................................................................................................................		13
	1.2	Related documents .......................................................................................................................		14
	1.3	Document conventions..................................................................................................................		15
		1.3.1	Quick reference table .......................................................................................................	15
		1.3.2	Superscript notation for parameters and values...............................................................	16
	1.4	AT command syntax......................................................................................................................		17
		1.4.1	Using parameters .............................................................................................................	17
		1.4.2	Combining AT commands on the same command line....................................................	18
	1.5	Supported character sets ..............................................................................................................		19
		1.5.1	GSM alphabet tables and UCS2 character values...........................................................	21
		1.5.2	UCS2 and GSM data coding and conversion for SMS text mode....................................	23
		1.5.2.1	Implementing output of SIM data to the TE (direction ME to TE).....................................	23
		1.5.2.2	Implementing input of Terminal data to SIM (direction TE to ME) ....................................	24
	1.6	Flow Control ..................................................................................................................................		26
		1.6.1	Software flow control (XON/OFF flow control) .................................................................	26
		1.6.2	Hardware flow control (RTS/CTS flow control).................................................................	26
	1.7	Unsolicited Result Code Presentation...........................................................................................		27
		1.7.1	Communication between Customer Application and MC55 .............................................	27
	1.8	Common PCN Handset Specification (CPHS) ..............................................................................		28
	1.9	Errors and Messages ....................................................................................................................		29

2.		Configuration Commands.....................................................................................................................				30
		2.1	AT&F	Set all current parameters to manufacturer defaults .........................................................		30
		2.2	AT&V	Display current configuration ............................................................................................		31
			2.2.1	AT&V responses ..............................................................................................................		31
		2.3	AT&W Stores current configuration to user defined profile .........................................................			33
		2.4	ATQ	Set result code presentation mode .....................................................................................		34
		2.5	ATV	Set result code format mode ...............................................................................................		35
			2.5.1 Verbose and numeric result codes...................................................................................			35
		2.6	ATX	Set CONNECT result code format and call monitoring .......................................................		37
		2.7	ATZ	Set all current parameters to user defined profile................................................................		38
		2.8	AT+CFUN		Set phone functionality ..............................................................................................	39
			2.8.1 Wake up the ME from SLEEP mode ................................................................................			43
		2.9	AT^SMSO		Switch off mobile station............................................................................................	44
		2.10	AT+GCAP		Request complete TA capabilities list........................................................................	45
		2.11	AT+CMEE		Report mobile equipment error .................................................................................	46
			2.11.1 Summary of CME ERRORS related to GSM 07.07 .........................................................			47
			2.11.2 Summary of GPRS-related CME ERRORS .....................................................................			48
MC55_ATC_V01.05					Page 3 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

			2.11.3		Summary of CMS ERRORS related to GSM 07.05 .........................................................		49
		2.12	AT+CSCS			Select TE character set .............................................................................................	52
		2.13	AT^SCFG			Extended Configuration Setting .................................................................................	54
		2.14	AT^SM20			Set M20 compatibility mode .......................................................................................	61
3.		Status Control Commands ...................................................................................................................					63
		3.1	AT+CMER			Mobile Equipment Event Reporting ..........................................................................	63
		3.2	AT+CIND			Indicator control ..........................................................................................................	66
		3.3	AT^SIND			Extended Indicator Control..........................................................................................	70
		3.4	AT+CEER			Extended error report ................................................................................................	73
			3.4.1		Cause Location ID for the extended error report..............................................................		75
			3.4.2		GSM release cause for L3 Radio Resource (RR) ............................................................		76
			3.4.3		SIEMENS release cause for L3 Radio Resource (RR) ....................................................		77
			3.4.4		GSM release cause for Mobility Management (MM) ........................................................		77
			3.4.5		SIEMENS release cause for L3 Mobility Management (MM) ...........................................		78
			3.4.6		GSM release cause for L3 Call Control (CC) ...................................................................		78
			3.4.7		SIEMENS release cause for L3 Call Control (CC) ...........................................................		80
			3.4.8		SIEMENS release cause for L3 Advice of Charge (AOC)................................................		81
			3.4.9		GSM Release cause for Supplementary Service Call......................................................		81
			3.4.10		SIEMENS release cause for Call-related Supplementary Services (CRSS)....................		82
			3.4.11		SIEMENS release cause for Session Management (SM) ................................................		83
			3.4.12		GSM cause for L3 Protocol module or other local cause ................................................		84
			3.4.13		SIEMENS release cause for GPRS API...........................................................................		84
			3.4.14		SIEMENS release cause for Embedded Netcore.............................................................		84
		3.5	ATS18		Extended call release report............................................................................................		85
		3.6	AT+CPAS			Mobile equipment activity status................................................................................	87
		3.7	AT+WS46			Select wireless network .............................................................................................	88
4.		Serial Interface Control Commands.....................................................................................................					89
		4.1	AT\Q	Flowcontrol.........................................................................................................................			89
		4.2	AT&C		Set circuit Data Carrier Detect (DCD) function mode .......................................................		90
		4.3	AT&D		Set circuit Data Terminal Ready (DTR) function mode.....................................................		91
		4.4	AT&S		Set circuit Data Set Ready (DSR) function mode .............................................................		92
		4.5	ATE	Enable command echo........................................................................................................			93
		4.6	AT+ILRR			Set TE-TA local rate reporting.....................................................................................	94
		4.7	AT+IPR Set fixed local rate .........................................................................................................				96
			4.7.1		Autobauding .....................................................................................................................		98
		4.8	AT+CMUX			Enter multiplex mode ................................................................................................	99
			4.8.1		Restrictions on Multiplex mode ......................................................................................		100
			4.8.2		Second serial interface ASC1 ........................................................................................		102
5.		Security Commands............................................................................................................................					103
		5.1	AT+CPIN			Enter PIN ..................................................................................................................	103
			5.1.1		What to do if PIN or password authentication fails?.......................................................		105
		5.2	AT+CPIN2			Enter PIN2 ..............................................................................................................	107
MC55_ATC_V01.05						Page 4 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

		5.3	AT^SPIC		Display PIN counter...................................................................................................		110
		5.4	AT+CLCK			Facility lock ..............................................................................................................	115
		5.5	AT^SLCK			Facility lock ...............................................................................................................	121
		5.6	AT+CPWD			Change Password ..................................................................................................	122
		5.7	AT^SPWD			Change Password...................................................................................................	126
6.		Identification Commands....................................................................................................................					127
		6.1	ATI Display product identification information ...........................................................................				127
		6.2	AT+CGMI			Request manufacturer identification.........................................................................	128
		6.3	AT+GMI		Request manufacturer identification ...........................................................................		129
		6.4	AT+CGMM			Request model identification ..................................................................................	130
		6.5	AT+GMM			Request TA model identification ...............................................................................	131
		6.6	AT+CGMR			Request revision identification of software status...................................................	132
		6.7	AT+GMR			Request TA revision identification of software status................................................	133
		6.8	AT+CGSN			Request product serial number identification (IMEI) identical to GSN ....................	134
		6.9	AT+GSN		Request TA serial number identification (IMEI) .........................................................		135
		6.10	AT+CIMI		Request international mobile subscriber identity .......................................................		136
7.		Call related Commands.......................................................................................................................					137
		7.1	Call Status Information ................................................................................................................				137
		7.2	ATA	Answer a call .....................................................................................................................			139
		7.3	ATD	Mobile originated call to dial a number..............................................................................			140
		7.4	ATD><mem><n> Originate call to phone number in memory...................................................				143
		7.5	ATD><n>			Originate call to phone number selected from active memory..................................	145
		7.6	ATD><str>			Originate call to phone number in memory with corresponding field ......................	147
		7.7	ATDI	Mobile originated call to dialable ISDN number <n> ........................................................			149
		7.8	ATDL	Redial last telephone number used.................................................................................			150
		7.9	ATH	Disconnect existing connection.........................................................................................			151
		7.10	AT+CHUP			Hang up call ............................................................................................................	152
		7.11	ATS0	Set number of rings before automatically answering the call ..........................................			153
		7.12	ATS6	Set pause before blind dialing.........................................................................................			155
		7.13	ATS7	Set number of seconds to wait for connection completion ..............................................			156
		7.14	ATS8	Set number of seconds to wait for comma dialing modifier.............................................			157
		7.15	ATS10 Set disconnect delay after indicating the absence of data carrier .................................				158
		7.16	ATP	Select pulse dialing ...........................................................................................................			159
		7.17	ATO	Switch from command mode to data mode / PPP online mode........................................			160
		7.18	+++ Switch from data mode to command mode .......................................................................				161
		7.19	ATT	Select tone dialing .............................................................................................................			162
		7.20	AT+CBST			Select bearer service type .......................................................................................	163
		7.21	AT+CRLP			Select radio link protocol param. for orig. non-transparent data call........................	165
		7.22	AT+CLCC			List current calls of ME ............................................................................................	167
		7.23	AT^SLCC			Siemens defined command to list the current calls of the ME..................................	170
MC55_ATC_V01.05						Page 5 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

	7.24	AT+CR	Service reporting control ..............................................................................................			176
	7.25	AT+CRC		Set Cellular Result Codes for incoming call indication ..............................................		178
	7.26	AT+CSNS			Single Numbering Scheme......................................................................................	180
	7.27	AT^SCNI		List Call Number Information.....................................................................................		182
	7.28	AT^SLCD		Display Last Call Duration ........................................................................................		184
	7.29	AT^STCD		Display Total Call Duration.......................................................................................		185
8.	Network Service Commands ..............................................................................................................					186
	8.1	AT+COPN			Read operator names .............................................................................................	186
	8.2	AT+COPS			Operator selection ...................................................................................................	187
	8.3	AT+CREG			Network registration ................................................................................................	190
	8.4	AT+CSQ		Signal quality .............................................................................................................		193
	8.5	AT^SMONC			Cell Monitoring......................................................................................................	195
	8.6	AT^MONI		Monitor idle mode and dedicated mode ...................................................................		197
		8.6.1	AT^MONI responses ......................................................................................................			198
		8.6.2	Service states.................................................................................................................			199
		8.6.3	Notes ..............................................................................................................................			199
	8.7	AT^MONP			Monitor neighbour cells ...........................................................................................	201
		8.7.1	AT^MONP responses.....................................................................................................			202
	8.8	AT^SMONG GPRS Monitor ......................................................................................................				203
		8.8.1 AT^SMONG Cell Info Table ...........................................................................................				204
	8.9	AT^SALS		Alternate Line Service...............................................................................................		205
	8.10	AT^SHOM			Display Homezone ..................................................................................................	207
	8.11	AT^SPLM		Read the PLMN list ..................................................................................................		208
	8.12	AT^SPLR		Read entry from the preferred operators list.............................................................		209
	8.13	AT^SPLW		Write an entry to the preferred operators list ...........................................................		211
9.	Supplementary Service Commands ..................................................................................................					212
	9.1	AT+CACM			Accumulated call meter (ACM) reset or query ........................................................	212
	9.2	AT^SACM			Advice of charge and query of ACM and ACMmax .................................................	214
	9.3	AT+CAMM			Accumulated call meter maximum (ACMmax) set or query....................................	216
	9.4	AT+CAOC			Advice of Charge information..................................................................................	218
	9.5	AT+CCUG			Closed User Group .................................................................................................	220
	9.6	AT+CCFC			Call forwarding number and conditions control .......................................................	222
	9.7	AT+CCWA			Call Waiting ............................................................................................................	226
	9.8	AT+CHLD		Call Hold and Multiparty...........................................................................................		230
	9.9	AT+CLIP		Calling line identification presentation .......................................................................		233
	9.10	AT+CLIR		Calling line identification restriction ...........................................................................		235
	9.11	AT+CPUC			Price per unit and currency table.............................................................................	237
	9.12	AT+CSSN			Supplementary service notifications ........................................................................	239
	9.13	AT+CUSD			Supplementary service notifications........................................................................	241

MC55_ATC_V01.05	Page 6 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

10. GPRS Commands................................................................................................................................						243
10.1	AT+CGACT			PDP context activate or deactivate .......................................................................		243
10.2	AT+CGANS			Manual response to a network request for PDP context activation ......................		245
10.3	AT+CGATT GPRS attach or detach .........................................................................................					247
10.4	AT+CGAUTO				Automatic response to a network request for PDP context activation ...............	249
10.5	AT+CGDATA			Enter data state ..................................................................................................		251
10.6	AT+CGDCONT				Define PDP Context ........................................................................................	253
10.7	AT+CGPADDR				Show PDP address .........................................................................................	255
10.8	AT+CGQMIN			Quality of Service Profile (Minimum acceptable) ................................................		256
10.9	AT+CGQREQ				Quality of Service Profile (Requested) ..............................................................	260
10.10	AT+CGREG			GPRS network registration status ........................................................................		264
10.11	AT+CGSMS			Select service for MO SMS messages.................................................................		266
10.12	AT^SGAUTH			Set type of authentication for PPP connection....................................................		268
10.13	AT^SGCONF			Configuration of GPRS related Parameters ......................................................		269
10.14	ATA	Manual response to a network request for PDP context activation...................................				271
10.15	ATD*99#		Request GPRS service..............................................................................................			272
10.16	ATD*98#		Request GPRS IP service .........................................................................................			274
10.17	ATH	Manual rejection of a network request for PDP context activation....................................				275
10.18	ATS0	Automatic response to a network request for PDP context activation.............................				276
10.19	Using GPRS AT commands (Examples).....................................................................................					278
10.20	Using the GPRS dial command ATD ..........................................................................................					280

11. FAX Commands...................................................................................................................................						281
11.1		FAX parameters ..........................................................................................................................				281
11.2		AT+FBADLIN			Bad Line Threshold ............................................................................................	284
11.3		AT+FBADMUL			Error Threshold Multiplier .................................................................................	285
11.4		AT+FBOR		Query data bit order.................................................................................................		286
11.5		AT+FCIG		Query or set the Local Polling ID ..............................................................................		287
11.6		AT+FCLASS Fax: Select, read or test service class.................................................................				288
11.7		AT+FCQ		Copy Quality Checking ..............................................................................................		290
11.8		AT+FCR		Capability to receive...................................................................................................		291
11.9		AT+FDCC		Query or set capabilities ..........................................................................................		292
11.10		AT+FDFFC Data Compression Format Conversion .................................................................				293
11.11		AT+FDIS		Query or set session parameters ..............................................................................		294
11.12		AT+FDR		Begin or continue phase C data reception .................................................................		295
11.13		AT+FDT		Data Transmission......................................................................................................		296
11.14		AT+FET	End a page or document ............................................................................................			297
11.15		AT+FK	Kill operation, orderly FAX abort ...................................................................................			298
11.16		AT+FLID		Query or set the Local Id setting capabilities .............................................................		299
11.17		AT+FMDL		Identify Product Model ............................................................................................		300
11.18		AT+FMFR		Request Manufacturer Identification........................................................................		301
MC55_ATC_V01.05					Page 7 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

11.19	AT+FOPT		Set bit order independently ......................................................................................	302
11.20	AT+FPHCTO DTE Phase C Response Timeout.......................................................................			303
11.21	AT+FREV		Identify Product Revision .........................................................................................	304
11.22	AT+FRH	Receive Data Using HDLC Framing ..........................................................................		305
11.23	AT+FRM	Receive Data .............................................................................................................		306
11.24	AT+FRS	Receive Silence..........................................................................................................		307
11.25	AT+FTH	Transmit Data Using HDLC Framing..........................................................................		308
11.26	AT+FTM	Transmit Data.............................................................................................................		309
11.27	AT+FTS	Stop Transmission and Wait.......................................................................................		310
11.28	AT+FVRFC		Vertical resolution format conversion ....................................................................	311
12. Short Message Service (SMS) Commands........................................................................................				312
12.1	SMS parameters .........................................................................................................................			312
12.2	AT+CMGC		Send an SMS command.........................................................................................	316
12.3	AT+CMGD		Delete SMS message.............................................................................................	317
12.4	AT+CMGF		Select SMS message format ..................................................................................	318
12.5	AT+CMGL		List SMS messages from preferred store................................................................	319
12.6	AT+CMGR		Read SMS messages.............................................................................................	321
12.7	AT+CMGS		Send SMS message ...............................................................................................	323
12.8	AT+CMGW		Write SMS messages to memory ..........................................................................	325
12.9	AT+CMSS		Send SMS messages from storage ........................................................................	327
12.10	AT+CNMA		New SMS message acknowledge to ME/TE, only phase 2+ ..................................	328
12.11	AT+CNMI		New SMS message indications................................................................................	330
12.12	AT+CPMS		Preferred SMS message storage............................................................................	334
12.13	AT+CSCA		SMS service centre address....................................................................................	337
12.14	AT+CSCB		Select Cell Broadcast Message Indication ..............................................................	338
12.15	AT+CSDH		Show SMS text mode parameters...........................................................................	340
12.16	AT+CSMP		Set SMS text mode parameters ..............................................................................	341
12.17	AT+CSMS		Select Message Service..........................................................................................	343
12.18	AT^SLMS		List SMS Memory Storage .......................................................................................	345
12.19	AT^SMGL		List SMS messages from preferred store without setting status to REC READ ......	347
12.20	AT^SMGO		Set or query SMS overflow presentation mode or query SMS overflow .................	348
12.21	AT^SMGR		Read SMS message without setting status to REC READ .....................................	350
12.22	AT^SSCONF SMS Configuration .............................................................................................			351
12.23	AT^SSDA		Set SMS Display Availability ....................................................................................	353
12.24	AT^SSMSS		Set Short Message Storage Sequence .................................................................	355
13. SIM related Commands.......................................................................................................................				356
13.1	AT+CRSM		Restricted SIM Access............................................................................................	356
13.2	AT^SCKS		Query SIM and Chip Card Holder Status .................................................................	358
13.3	AT^SCID	Display SIM card identification number .....................................................................		360
13.4	AT+CXXCID Display card ID.....................................................................................................			361
MC55_ATC_V01.05			Page 8 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

14. SIM Application Toolkit (SAT) Commands........................................................................................			362
14.1	AT^SSTA	SAT Interface Activation ...........................................................................................	362
14.2	^SSTN SAT Notification ............................................................................................................		364
14.3	AT^SSTGI	SAT Get Information ...............................................................................................	366
14.4	AT^SSTR	SAT Response .........................................................................................................	368

15. Phonebook Commands.......................................................................................................................			370
15.1	Sort Order for Phonebooks .........................................................................................................		370
15.2	AT+CPBR	Read from Phonebook.............................................................................................	371
15.3	AT+CPBS	Select phonebook memory storage .........................................................................	374
15.4	AT+CPBW	Write into Phonebook .............................................................................................	376
15.5	AT^SPBC	Search the first entry in the sorted telephone book..................................................	379
15.6	AT^SPBD	Purge phonebook memory storage..........................................................................	381
15.7	AT^SPBG	Read current Phonebook entries .............................................................................	383
15.8	AT^SPBS	Step through the selected phonebook alphabetically...............................................	387
15.9	AT^SDLD	Delete the 'last number redial' memory ....................................................................	391

16. Audio Commands................................................................................................................................				392
16.1	Audio programming model ..........................................................................................................			392
16.2	ATL	Set monitor speaker loudness ...........................................................................................		393
16.3	ATM	Set monitor speaker mode................................................................................................		394
16.4	AT+CLVL		Loudspeaker volume level........................................................................................	395
16.5	AT+CMUT Mute control ............................................................................................................			397
16.6	AT+VTD		Tone duration .............................................................................................................	398
16.7	AT+VTS DTMF and tone generation.........................................................................................			399
16.8	AT^SAIC		Audio Interface Configuration ....................................................................................	401
16.9	AT^SNFA		Set or query of microphone attenuation ..................................................................	403
16.10	AT^SNFD		Set audio parameters to manufacturer default values .............................................	405
16.11	AT^SNFI		Set microphone path parameters ..............................................................................	406
16.12	AT^SNFM		Set microphone audio path and power supply.........................................................	408
16.13	AT^SNFO		Set audio output (= loudspeaker path) parameter ...................................................	410
16.14	AT^SNFPT Set progress tones .................................................................................................			412
16.15	AT^SNFS		Select audio hardware set........................................................................................	413
16.16	AT^SNFTTY Switch audio path to TTY/CTM mode .................................................................			417
16.17	AT^SNFV		Set loudspeaker volume...........................................................................................	419
16.18	AT^SNFW		Write audio setting in non-volatile store ..................................................................	421
16.19	AT^SRTC		Ring tone configuration ............................................................................................	422

17. Hardware related Commands.............................................................................................................				425
17.1		AT+CALA	Set alarm time .........................................................................................................	425
		17.1.1 Summary of AT commands available in Alarm mode ....................................................		428
17.2		AT+CCLK	Real Time Clock.......................................................................................................	429
17.3		AT^SBC	Battery charging / discharging and charge control .....................................................	430
MC55_ATC_V01.05			Page 9 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

Contents

s

mobile

		17.3.1 Summary of AT commands available in Charge-only and Alarm mode.........................			432
	17.4	AT^SBV Battery/Supply Voltage ...............................................................................................			433
	17.5	AT^SCTM		Set critical operating temperature presentation mode or query temperature...........	434
	17.6	AT^SSYNC		Configure SYNC Pin..............................................................................................	437
		17.6.1 ME status indicated by status LED patterns...................................................................			438
18.	Miscellaneous Commands..................................................................................................................				439
	18.1	A/ Repeat previous command line ............................................................................................			439
	18.2	ATS3	Write command line termination character......................................................................		440
	18.3	ATS4	Set response formatting character ..................................................................................		441
	18.4	ATS5	Write command line editing character .............................................................................		442
19.	Appendix ..............................................................................................................................................				443
	19.1	Restricted access to SIM data after SIM PIN authentication.......................................................			443
	19.2	List of *# Codes ...........................................................................................................................			444
	19.3	Available AT Commands and Dependency on SIM PIN .............................................................			448
	19.4	AT Command Settings storable with AT&W................................................................................			455
	19.5	Factory Default Settings Restorable with AT&F ..........................................................................			458
	19.6	Summary of Unsolicited Result Codes (URC).............................................................................			461
	19.7	Alphabetical List of AT Commands .............................................................................................			463

MC55_ATC_V01.05	Page 10 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

List of Tables

s

mobile

List of Tables
Table 1.1:	Symbols used to indicate the correlations with other commands ...............................................	16
Table 1.2:	Symbols used to mark different types of default values of parameters .....................................	16
Table 2.1:	Current configuration on ASC0 / MUX channel 1 (example) ......................................................	32
Table 2.2:	Current configuration on ASC1 and MUX channels 2 and 3 (example) ....................................	32
Table 2.3:	Wake-up events in NON-CYCLIC and CYCLIC SLEEP modes .................................................	43
Table 4.1:	Availability of AT Commands on Virtual Channels ..................................................................	100
Table 4.2:	Summary of AT commands with Different Behavior in Multiplex Mode ...................................	101
Table 17.1:	List of AT Commands Available in Alarm and Charge-only Mode>..........................................	428
Table 17.2:	Modes of the LED and indicated ME functions.........................................................................	438
Table 19.1:	List of *# Codes ........................................................................................................................	444
Table 19.2:	Abbreviations of Codes and Parameters Used in Table "List of *# Codes"..............................	445
Table 19.3:	Available AT Commands and Dependency on SIM PIN...........................................................	448
Table 19.4:	Settings Stored to User Profile on ASC0 / MUX Channel 1......................................................	455
Table 19.5:	Settings Stored to User Profile on ASC1 / MUX Channels 2 and 3..........................................	456
Table 19.6:	Factory Default Settings Restorable with AT&F .......................................................................	458
Table 19.7:	Summary of Unsolicited Result Codes (URC) ..........................................................................	461
Table 19.8:	Alphabetical List of AT Commands...........................................................................................	463

MC55_ATC_V01.05	Page 11 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

List of Figures

s

mobile

List of Figures
Figure 1.1:	Main character table of GSM 03.38 alphabet .............................................................................	21
Figure 1.2:	Extension character table of GSM 03.38 alphabet .....................................................................	22
Figure 16.1:	Audio programming model........................................................................................................	392

MC55_ATC_V01.05	Page 12 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1. Introduction

s

mobile

1.Introduction

1.1Scope of the document

This document presents the AT Command Set for the Siemens Cellular Engine

MC55 Version 01.05.

Before using the Cellular Engine or upgrading to a new firmware version please read the latest product information provided in the Release Notes [1].

More information is available at the Siemens Website: http://www.siemens.com/wm.

MC55_ATC_V01.05	Page 13 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.2 Related documents

s

mobile

1.2Related documents

[1]Release Notes: MC55, Version 01.05

[2]MC55 Hardware Interface Description, Version 01.05

[3]GPRS Startup User's Guide

[4]Remote-SAT User's Guide

[5]Multiplexer User's Guide

[6]Application Note 16: Updating MC55 Firmware

[7]Application Note 02: Audio Interface Design

[8]Multiplex Driver Developer's Guide for Windows 2000 and Windows XP

[9]Multiplex Driver Installation Guide for Windows 2000 and Windows XP [10] Application Note 22: Using TTY / CTM equipment with MC55

[11] ISO/IEC10646: "Universal Multiple-Octet Coded Character Set (UCS)"; UCS2, 16 bit coding

[12]ITU-T Recommendation V.24: List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

[13]ITU-T Recommendation V.25ter: Serial asynchronous automatic dialling and control

[14]3GPP TS 23.038 (GSM 03.38): Alphabets and language specific information

[15]3GPP TS 27.005 (GSM 07.05): Use of Data Terminal Equipment - Data Circuit terminating Equipment (DTE

-DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)

[16]3GPP TS 27.007 (GSM 07.07): AT command set for User Equipment (UE)

[17]3GPP TS 27.060 (GSM 07.60): Mobile Station (MS) supporting Packet Switched Services

[18]3GPP TS 51.011 (GSM 11.11): Specification of the Subscriber Identity Module - Mobile Equipment (SIM - ME) interface

[19]3GPP TS 11.14 (GSM 11.14): Specification of the SIM Application Toolkit for the Subscriber Identity Module

-Mobile Equipment (SIM - ME) interface

MC55_ATC_V01.05	Page 14 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.3 Document conventions

s

mobile

1.3Document conventions

Throughout the document, the GSM engines are referred to as ME (Mobile Equipment), MS (Mobile Station), TA (Terminal Adapter), DCE (Data Communication Equipment) or facsimile DCE (FAX modem, FAX board).

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).

All abbreviations and acronyms used throughout this document are based on the GSM specifications. For definitions please refer to TR 100 350 V7.0.0 (1999-08), (GSM 01.04, version 7.0.0 release 1998).

1.3.1Quick reference table

Each AT command description includes a table similar to the example shown below. The table is intended as a quick reference to indicate the following functions:

PIN:	Is the AT command PIN protected?
		Yes
		No
		Usage is dependent on conditions specified for the command, or not all command types are PIN
		protected (for example write command PIN protected, read command not).

Note: The table provided in the Chapter Available AT Commands and Dependency on SIM PIN uses the same symbols.

ASC0: Is the AT command supported on the first physical serial interface ASC0?

Yes

No

ASC1: Is the AT command supported on the second physical serial interface ASC1?

Yes

No

MUXn: Is the AT command usable on the Multiplexer channels MUX1, MUX2, MUX3?

Yes

No

AT command is usable, but under the restrictions specified in the chapter related to the command.

Note: The columns MUX1, MUX2 and MUX3 are relevant only when the GSM engine operates in Multiplexer mode, that is, when the first physical serial interface is partitioned into 3 virtual channels by using the Multiplexer protocol. Usage is the same on ASC0 and MUX1.

Example:

	PIN	ASC0	ASC1	MUX1	MUX2	MUX3

MC55_ATC_V01.05	Page 15 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.3 Document conventions

s

mobile

1.3.2Superscript notation for parameters and values

Table 1.1:	Symbols used to indicate the correlations with other commands
Parameter option		Meaning
<param>(&W)		Parameter value will be stored with AT&W
<param>(&V)		Parameter value will be displayed with AT&V
<param>(ˆSNFW)		Parameter value will be stored with AT^SNFW
<param>(+CSCS)		Parameter value has to be (is) coded according to current setting of <chset> (see
		AT+CSCS for details)
Table 1.2:	Symbols used to mark different types of default values of parameters
Value option		Meaning
[x]		Default value: if the parameter is omitted, the value 'x' will be assumed
x(&F)		Factory default value, will be restored to 'x' with AT&F
x(P)		Powerup default value of a parameter which is not stored at power down
x(D)		Delivery default value of a parameter which cannot be restored automatically

MC55_ATC_V01.05	Page 16 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.4 AT command syntax

s

mobile

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.

Types of AT commands and responses:

AT command type	Syntax	Function
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 parameter or
		parameters.
Write command	AT+CXXX=<...>	This command sets user-definable
		parameter values.
Exec(ution) command	AT+CXXX	The execution command reads
		non-variable parameters deter-
		mined by internal processes in the
		GSM engine.

1.4.1Using parameters

•Optional parameters are enclosed in square brackets. If optional parameters are omitted, the current settings are used until you change them.

•Optional parameters or subparameters 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. See also example 1.

•A parameter value enclosed in square brackets represents the value that will be used if an optional parameter is omitted. See also example 2.

•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.

•If an optional parameter of a V.25ter command is omitted, its value is assumed to be 0.

MC55_ATC_V01.05	Page 17 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.4 AT command syntax

s

mobile

Example 1: Omitting parameters in the middle of a string

AT+CCUG?	Query current setting
+CCUG: 1,10,1
OK
AT+CCUG=,9	Set only the middle parameter
OK
AT+CCUG?	Query new setting
+CCUG: 1,9,1
OK
Example 2: Using default parameter values for optional parameters
AT+CFUN=5,0	Activate CYCLIC SLEEP mode, don't reset ME
OK
AT+CFUN?	Query ME mode
+CFUN: 5
OK
AT+CFUN=	Set ME back to normal (default parameters: 1,0)
OK

+CFUN: 1 OK

1.4.2Combining 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.

AT command type	Comment
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.

MC55_ATC_V01.05	Page 18 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.5 Supported character sets

s

mobile

1.5Supported character sets

The ME supports two character sets: GSM 03.38 (7 bit, also referred to as GSM alphabet or SMS alphabet) and UCS2 (16 bit, refer to ISO/IEC 10646). See AT+CSCS for information about selecting the character set. Character tables can be found below.

Explanation of terms

•IRA

IRA means that one byte is displayed as two characters in hexadecimal format. for example, the byte 0x36 (decimal 54) is displayed as "36" (two chars).

•Escape sequences

The escape sequence used within a text coded in the GSM default alphabet (0x1B) must be correctly interpreted by the TE, both for character input and output. To the module, an escape sequence appears like any other byte received or sent.

•TE

TE is the terminal equipment that uses the GSM default alphabet as its character set. MS Hyperterminal (often used with the module) is an ANSI / ASCII terminal that does not support the GSM default alphabet.

•Data Coding Scheme

The Data Coding Scheme (dcs) is part of a short message and is saved on the SIM. When writing a short message to the SIM in textmode, the dcs stored with AT+CSMP is used.

•TE Character Set

The currently used TE character set is selected with AT+CSCS.

The behavior when encountering characters, that are not valid characters of the supported alphabets, is undefined.

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:

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

•"@" 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 the table below.

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

•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.

•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.

Examples for character definitions depending on alphabet

MC55_ATC_V01.05	Page 19 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.5 Supported character sets

s

mobile

GSM 03.38	GSM character	Corresponding	ASCII	Hex Esc
character	hex. value	ASCII character	Esc sequence	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.

MC55_ATC_V01.05	Page 20 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.5 Supported character sets

s

mobile

1.5.1GSM alphabet tables and UCS2 character values

This section provides tables for the GSM 03.38 alphabet supported by the ME. Below any GSM character find the corresponding two byte character value of the UCS2 alphabet.

Figure 1.1: Main character table of GSM 03.38 alphabet

1)This code is an escape to the following extension of the 7 bit default alphabet table.

2)This code is not a printable character and therefore not defined for the UCS2 alphabet. It shall be treated as the accompanying control character.

MC55_ATC_V01.05	Page 21 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.5 Supported character sets

s

mobile

Figure 1.2: Extension character table of GSM 03.38 alphabet

1)This code value is reserved for the extension to another extension table. On receipt of this code, a receiving entity shall display a space until another extension table is defined.

2)This code represents the EURO currency symbol. The code value is the one used for the character 'e'. Therefore a receiving entity which is incapable of displaying the EURO currency symbol will display the character 'e' instead.

3)This code is defined as a Page Break character and may be used for example in compressed CBS messages. Any mobile which does not understand the 7 bit default alphabet table extension mechanism will treat this character as Line Feed.

MC55_ATC_V01.05	Page 22 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.5 Supported character sets

s

mobile

In the event that an MS receives a code where a symbol is not represented in figure Extension character table of GSM 03.38 alphabet the MS shall display the character shown in the main default 7 bit alphabet table (see figure Main character table of GSM 03.38 alphabet).

1.5.2UCS2 and GSM data coding and conversion for SMS text mode

This chapter provides basic information on how to handle input and output character conversion for SMS text mode and Remote-SAT if internal (ME) and external (TE) character representation differ, i.e. if the Data Coding Scheme and the TE character use different coding.

1.5.2.1 Implementing output of SIM data to the TE (direction ME to TE)

dcs	7-Bit	8-Bit	16-Bit
CSCS	(GSM default)		(UCS2)
GSM	Case 1	Case 2	Case 3
	GSM (1:1)	IRA (1:1)	IRA (2:2)
UCS2	Case 4	Case 5	Case 6
	GSM to UCS2 (1:2)	GSM to UCS2 (1:2)	IRA (2:2)

Case 1

Every byte will be sent as GSM character (or ASCII with Hyperterminal).

Example: 0x41,0x21 "AB" (because of conversion from 7-bit to 8-bit)

Case 2

Every byte will be sent as IRA. No conversion.

Example: 0x41,0x42 "4142"

Case 3

Every byte will be sent as IRA. No conversion to GSM to avoid data loss.

Example: 0x00,0x41 "0041"

Problems:

•0x41,0x42 "4142" (invalid GSM character, but ignored with respect to GSM 07.05)

•0x41 Error (there are two bytes needed)

Case 4

Every byte will be converted from GSM to UCS2.

Example: 0x41,0x42 "00410042"

Case 5

Every byte will be converted from GSM to UCS2.

Example: 0x41,0x42 "00410042"

Case 6

Example: 0x41,0x42 "4142" Problems:

• 0x41 Error (there are two bytes needed)

MC55_ATC_V01.05	Page 23 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.5 Supported character sets

s

mobile

1.5.2.2 Implementing input of Terminal data to SIM (direction TE to ME)

CSCS	GSM	UCS2
dcs
7-Bit	Case 1	Case 4
(GSM default)	GSM (1:1)	UCS2 to GSM (2:1)
8-Bit	Case 2	Case 5
	IRA (1:1)	UCS2 to GSM (2:1)
16-Bit	Case 3	Case 6
(UCS2)	IRA (2:2)	IRA (2:2)

Case 1

Data will be packed to 7-bit.

Maximum text length: 160 characters

Example: "AB" 0x41,0x21

Case 2

Data will be saved without any conversion. Maximum text length: 280 characters Example: "4142" 0x41,0x42

Problems:

• "8f" Error (invalid GSM character)

Case 3

Two bytes are needed. No conversion. Maximum text length: 280 characters Example: "0041" 0x00,0x41 Problems:

• "41" Error (there are two bytes needed)

Case 4

Two bytes are needed. Two bytes will be converted to 1 byte GSM and 7-bit packed. Maximum text length: 640 characters

Example: "00410042" 0x41,0x21 Problems:

•"41" Error (there are two bytes needed)

•"4142" Error (invalid character)

•"0000" Error (not an UCS2 character)

•"007B" 0x1B,0x28 (the saved data are two bytes long, not 1 byte like in all other cases. This effects the maximum input length of a string)

Case 5

Two bytes are needed. Two bytes will be converted to 1 byte GSM.

Maximum text length: 560 characters

Example: "00410042" 0x41,0x42

Problems:

•"41" Error (there are two bytes needed)

•"4142" Error (invalid character)

•"0000" Error (not an UCS2 character)

•"007B" 0x1B,0x28 (the saved data are two bytes long, not 1 byte like in all other cases. This effects the maximum input length of a string).

MC55_ATC_V01.05	Page 24 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.5 Supported character sets

s

mobile

Case 6

Two bytes are needed.

Maximum text length: 280 characters Example: "00410042" 0x00,0x41,0x00,0x21 Problems:

•"41" Error (there are two bytes needed)

•"0000" Error (not an UCS2 character)

•"007B" 0x00,0x7B

MC55_ATC_V01.05	Page 25 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.6 Flow Control

s

mobile

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.

1.6.1Software 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.

1.6.2Hardware 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.

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 AT+CFUN.

Note: After deactivating the RTS line, the ME may still send up to 264 bytes (worst case). 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. For host applications that are required to handle a large amount of data at high speed, a total buffer capacity of 512 bytes is recommended.

MC55_ATC_V01.05	Page 26 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.7 Unsolicited Result Code Presentation

s

mobile

1.7Unsolicited Result Code Presentation

URC stands for Unsolicited Result Code and is a report message issued by the ME without being requested by the TE, i.e. a URC is issued automatically when a certain event occurs. Hence, a URC is not issued as part of the response related to an executed AT command.

Typical events leading to URCs are incoming calls ("RING"), received SMs, changing temperature, status of the battery etc.

A summary of all URCs is given in chapter Summary of Unsolicited Result Codes (URC).

To announce a pending URC transmission the ME will do the following:

•Activates its Ring line (logic "1") for one second, i.e. the line changes to physical "Low" level. This allows the TE to enter power saving mode until ME related events request service.

•If the AT command interface is busy a "BREAK" will be sent immediately but the URC will not be issued until the line is free. This may happen if the URC is pending

-while an AT command is being processed, i.e. during the time from sending the first character "A" of an AT command by the TE until the ME has responded with "OK" or "ERROR", or

-during a data call.

Please note that AT command settings may be necessary to enable in-band signaling, e.g. refer to AT+CMER or AT+CNMI.

It is strongly recommended to use the multiplex mode to map logical communication channels onto the serial line of the MC55, for details refer to [5] and AT command AT+CMUX. Doing so it is possible to use one channel to still process URCs while having a data call active on another.

For most of these messages, the ME needs to be configured whether or not to send an URC. Depending on the AT command, the URC presentation mode can be saved to the user defined profile (see AT&W), or needs to be activated every time you reboot the ME. Several URCs are not user definable, such as "^SYSSTART", "^SYSSTART <text>", "^SHUTDOWN" and the Fax Class 2 URCs listed in Chapter Summary of Unsolicited Result Codes (URC).

If autobauding is enabled (as factory default mode or set with AT+IPR=0), URCs generated after restart will be output with 57600 bps until the ME has detected the current bit rate. The URCs "^SYSSTART", "^SYSSTART <text>", however, are not presented at all. For details please refer to Chapter 4.7.1. To avoid problems we recommend to configure a fixed bit rate rather than using autobauding.

1.7.1Communication between Customer Application and MC55

Leaving hardware flow control unconsidered the Customer Application (TE) is coupled with the MC55 (ME) via a receive and a transmit line.

Since both lines are driven by independent devices collisions may (and will) happen, i.e. while the TE issues an AT command the MC55 starts sending an URC. This probably will lead to the TE's misinterpretation of the URC being part of the AT command's response.

To avoid this conflict the following measures must be taken:

•If an AT command is finished (with "OK" or "ERROR") the TE shall always wait at least 100 milliseconds before sending the next one.

This gives the MC55 the opportunity to transmit pending URCs and get necessary service.

Note that some AT commands may require more delay after "OK" or "ERROR" response, refer to the following command specifications for details.

•The TE shall communicate with the MC55 using activated echo (ATE1), i.e. the MC55 echoes characters received from the TE.

Hence, when the TE receives the echo of the first character "A" of the AT command just sent by itself it has control over both the receive and the transmit paths. This way no URC can be issued by the MC55 in between.

MC55_ATC_V01.05	Page 27 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.8 Common PCN Handset Specification (CPHS)

s

mobile

1.8Common PCN Handset Specification (CPHS)

The ME provides features to implement a device following the prerequisites of the Common PCN Handset Specification (CPHS) Phase 2.

CPHS Feature	Description/Remarks	AT command
Alternate Line Service	Using two phone numbers with one SIM card.	AT^SALS
Voice Message Waiting	Indicate the receipt of a short message coded as Voice Mes-	AT^SIND,
Indication	sage Waiting Indicator as defined by the CPHS Phase 2	AT+CMER, indicators
	standard.	"vmwait1" and
		"vmwait2"
Operator (Service pro-	Read specific Elementary Files (6F14h, 6F18h) from SIM.	AT+CRSM
vider) name from SIM
Network and Service Pro-	Lock/Unlock an ME to specific HPLMN and service provider.	AT+CLCK,
vider Lock		(AT+CPIN)
Call Forwarding	Get and set diverted call status. Access specific Elementary	AT+CCFC, AT+CRSM
	File (6F13h) from SIM.
Customer Service Profile	Setting services and their menu entries depending on cus-	AT+CRSM
(CSP)	tomer profiles.
Information numbers	Hierarchically structured service numbers phonebook on	AT+CRSM
	SIM according to CPHS 4.2 (mandatory).

MC55_ATC_V01.05	Page 28 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

1.9 Errors and Messages

s

mobile

1.9Errors and Messages

The final result codes "+CME ERROR: <err>" and "+CMS ERROR: <err>" indicate errors related to mobile equipment or network. The effect is similar to an ERROR result code.

A final result error code terminates the execution of the command and prevents the execution of all remaining commands that may follow on the same command line. If so, neither ERROR nor OK result code are returned for these commands. A 30 seconds timeout causes ERROR to be returned when the input of a command is not complete.

The format of <err> can be either numeric or verbose. This is set with the command AT+CMEE.

See also:

•2.11.1

•2.5.1

•AT+CEER

MC55_ATC_V01.05	Page 29 of 469	2/10/04
Confidential / Released

MC55 AT Command Set

2. Configuration Commands

s

mobile

2.Configuration Commands

The AT Commands described in this chapter allow the external application to determine the MC55's behaviour under various conditions.

2.1	AT&F Set all current parameters to manufacturer defaults

Syntax

Exec Command

AT&F[<value>]

Response(s)

OK

	PIN	ASC0	ASC1	MUX1	MUX2	MUX3

Reference(s)

V.25ter

Command Description

TA sets all current parameters to the manufacturer defined profile.

Parameter Description

<value>(num)

[0] set all TA parameters to manufacturer defaults

Notes

•List of parameters reset to manufacturer default can be found in Chapter Factory Default Settings Restorable with AT&F.

•In addition to the default profile, you can store an individual one with AT&W. To alternate between the two profiles enter either ATZ (loads user profile) or AT&F (restores factory profile).

•Every ongoing or incoming call will be terminated.

MC55_ATC_V01.05	Page 30 of 469	2/10/04
Confidential / Released