SIST ETS 300 916 E4:2003

SLOVENSKI STANDARD
SIST ETS 300 916 E4:2003
01-december-2003
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Digital cellular telecommunications system (Phase 2+) (GSM); AT command set for GSM
Mobile Equipment (ME) (GSM 07.07 version 5.5.1)
Ta slovenski standard je istoveten z: ETS 300 916 Edition 4
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 916 E4:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 916 E4:2003

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SIST ETS 300 916 E4:2003
EUROPEAN ETS 300 916
TELECOMMUNICATION July 1998
STANDARD Fourth Edition
Source: SMG Reference: RE/SMG-040707QR3
ICS: 33.020
Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
Digital cellular telecommunications system (Phase 2+);
AT command set for GSM Mobile Equipment (ME)
(GSM 07.07 version 5.5.1)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: secretariat@etsi.fr - http://www.etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1998. All rights reserved.

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Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents
Foreword .7
Introduction.7
1 Scope .9
2 References.9
3 Abbreviations and definitions .11
3.1 Abbreviations .11
3.2 Definitions .12
4 AT command syntax .12
4.1 Command line.12
4.2 Information responses and result codes.13
4.3 ITU-T V.25ter [14] TE-TA interface commands.13
5 General commands.14
5.1 Request manufacturer identification +CGMI.14
5.2 Request model identification +CGMM .15
5.3 Request revision identification +CGMR .15
5.4 Request product serial number identification +CGSN .16
5.5 Select TE character set +CSCS .16
5.6 Request international mobile subscriber identity +CIMI.17
5.7 Multiplexing mode +CMUX $(MUX MS-TE)$ .17
5.8 ITU-T V.25ter [14] generic TA control commands.19
5.9 PCCA STD-101 [17] select wireless network +WS46 .19
5.10 Informative examples.20
6 Call control commands and methods.21
6.1 Select type of address +CSTA.21
6.2 ITU-T V.25ter [14] dial command D.21
6.3 Direct dialling from phonebooks .22
6.4 Call mode +CMOD.22
6.5 Hangup call +CHUP.23
6.6 Alternating mode call control method .23
6.7 Select bearer service type +CBST.25
6.8 Radio link protocol +CRLP.27
6.9 Service reporting control +CR.27
6.10 Extended error report +CEER.28
6.11 Cellular result codes +CRC .29
6.12 HSCSD device parameters +CHSD .29
6.13 HSCSD transparent call configuration +CHST .30
6.14 HSCSD non-transparent call configuration +CHSN.30
6.15 HSCSD current call parameters +CHSC .31
6.16 Single numbering scheme +CSNS .32
6.17 Voice Hangup Control +CVHU $(AT R97)$.32
6.18 V.120 rate adaption protocol +CV120.33
6.19 ITU-T V.25ter [14] call control commands.34
6.20 ITU-T V.25ter [14] data compression commands.34
6.21 Informative examples.35
7 Network service related commands.36
7.1 Subscriber number +CNUM.36
7.2 Network registration +CREG .36
7.3 Operator selection +COPS .37

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7.4 Facility lock +CLCK . 38
7.5 Change password +CPWD . 40
7.6 Calling line identification presentation +CLIP. 40
7.7 Calling line identification restriction +CLIR. 41
7.8 Connected line identification presentation +COLP. 42
7.9 Closed user group +CCUG . 43
7.10 Call forwarding number and conditions +CCFC. 43
7.11 Call waiting +CCWA.45
7.12 Call related supplementary services +CHLD . 46
7.13 Call deflection +CTFR.46
7.14 Unstructured supplementary service data +CUSD . 47
7.15 Advice of Charge +CAOC . 48
7.16 Supplementary service notifications +CSSN. 49
7.17 List current calls +CLCC . 50
7.18 Preferred operator list +CPOL $(AT R97)$. 51
7.19 Read operator names +COPN $(AT R97)$ . 52
7.20 Informative examples.52
8 Mobile Equipment control and status commands. 54
8.1 Phone activity status +CPAS. 55
8.2 Set phone functionality +CFUN. 56
8.3 Enter PIN +CPIN . 57
8.4 Battery charge +CBC . 58
8.5 Signal quality +CSQ .58
8.6 Mobile Equipment control mode +CMEC. 59
8.7 Keypad control +CKPD . 59
8.8 Display control +CDIS . 61
8.9 Indicator control +CIND. 61
8.10 Mobile Equipment event reporting +CMER. 62
8.11 Select phonebook memory storage +CPBS. 64
8.12 Read phonebook entries +CPBR. 64
8.13 Find phonebook entries +CPBF. 65
8.14 Write phonebook entry +CPBW. 66
8.15 Clock +CCLK. 67
8.16 Alarm +CALA . 67
8.17 Generic SIM access +CSIM. 68
8.18 Restricted SIM access +CRSM. 69
8.19 Secure control command +CSCC. 70
8.20 Alert sound mode +CALM $(AT R97)$ . 71
8.21 Ringer sound level +CRSL $(AT R97)$ . 71
8.22 Vibrator mode +CVIB $(AT R97)$. 72
8.23 Loudspeaker volume level +CLVL $(AT R97)$. 72
8.24 Mute control +CMUT $(AT R97)$ . 73
8.25 Accumulated call meter +CACM $(AT R97)$ . 73
8.26 Accumulated call meter maximum +CAMM $(AT R97)$ . 74
8.27 Price per unit and currency table +CPUC $(AT R97)$. 74
8.28 Informative examples.75
9 Mobile Equipment errors. 78
9.1 Report Mobile Equipment error +CMEE. 78
9.2 Mobile Equipment error result code +CME ERROR . 79
9.3 Informative examples. 80
Annex A (normative): Summary of commands from other standards . 81
Annex B (normative): Summary of result codes. 83
Annex C (informative): Commands from TIA IS-101. 84
C.1 Introduction. 84
C.2 Commands . 85
C.2.1 Select mode +FCLASS . 85

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C.2.2 Buffer threshold setting +VBT.85
C.2.3 Calling number ID presentation +VCID.85
C.2.4 Receive gain selection +VGR .86
C.2.5 Transmit gain selection +VGT .86
C.2.6 Initialise voice parameters +VIP .86
C.2.7 Inactivity timer +VIT .87
C.2.8 Line selection +VLS .87
C.2.9 Receive data state +VRX.88
C.2.10 Select compression method +VSM .89
C.2.11 DTMF and tone generation +VTS.89
C.2.12 Tone duration +VTD .90
C.2.13 Transmit data state +VTX.90
Annex D (informative): Bibliography.91
Annex E (informative): Mobile originated alternating voice/data call example.92
Annex F (informative): Mobile terminated voice followed by data call example.93
Annex G (informative): Voice call example.94
Annex H (informative): Change History.95
History.96

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) of the European Telecommunications Standards Institute (ETSI).
This ETS specifies the AT command for terminal equipments being used within the digital cellular
telecommunications system.
The contents of this ETS is subject to continuing work within SMG and may change following formal SMG
approval. Should SMG modify the contents of this ETS, it will be resubmitted for OAP by ETSI with an
identifying change of release date and an increase in version number as follows:
Version 5.x.y
where:
y the third digit is incremented when editorial only changes have been incorporated in the
specification;
x the second digit is incremented for all other types of changes, i.e. technical enhancements,
corrections, updates, etc.
Transposition dates
Date of adoption of this ETS: 19 June 1998
Date of latest announcement of this ETS (doa): 31 October 1998
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 April 1999
Date of withdrawal of any conflicting National Standard (dow): 30 April 1999
Introduction
The present document includes references to features which were introduced into the GSM Technical
specifications after Release 96 of GSM Phase 2+. The text that is relevant, if the feature is supported, is
marked with designators. GSM 10.01 defines the correspondence between these features and GSM
yearly releases.
The following table lists all features that were introduced after Release 96 and have impacted this
specification:
Feature Designator
Technical enhancement and improvement: New AT- $(AT R97)$
commands
Support of Multiplexer according to GSM 07.10 $(MUX MS-TE)$

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1 Scope
This European Telecommunication Standard (ETS) specifies a profile of AT commands and recommends
that this profile be used for controlling Mobile Equipment (ME) functions and GSM network services from
a Terminal Equipment (TE) through Terminal Adaptor (TA). The command prefix +C is reserved for Digital
Cellular in ITU-T Recommendation V.25ter [14]. This ETS has also the syntax details used to construct
these extended GSM commands. Commands from ITU-T Recommendation V.25ter [14] and existing
digital cellular standards (TIA IS-99 [15] and TIA IS-135 [16]) are used whenever applicable. Some of the
new commands are defined such way that they can be easily applied to ME of networks other than GSM.
ITU-T T.31 [11] and T.32 [12] fax AT commands may be used for GSM fax transmission from TE. GSM
Short Message Service AT commands are defined in GSM 07.05 [24]. GPRS AT commands are defined
in GSM 07.60 [34].This ETS assumes an abstract architecture comprising a TE (e.g. a computer) and a
ME interfaced by a TA (see figure 1). The span of control of the defined commands should allow to handle
any physical implementation that this abstract architecture may lead to:
- TA, ME and TE as three separate entities;
- TA integrated under the ME cover, and the TE implemented as a separate entity;
- TA integrated under the TE cover, and the ME implemented as a separate entity;
- TA and ME integrated under the TE cover as a single entity.
The commands described in this ETS may be observed on the link between the TE and the TA. However,
most of the commands retrieve information about the ME, not about the TA.
responses ME status
TE TA ME
AT cmds ME control
network messages
USER & APPLICATIONS NETWORK
Figure 1: Setup
Interface between TE and TA is intended to operate over existing serial (ITU-T Recommendation V.24)
cables, infrared link, and all link types with similar behaviour. For correct operation many of the defined
commands require eight bit data and therefore it is recommended that TE-TA link is set to eight bits/ byte
mode. (For infrared operation implementation refer informative references IrDA. For embedding AT
commands and data during on-line data state refer TIA-617/ITU-T V.80.) Interface between TA and ME is
dependent on the interface in the ME.
2 References
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] GSM 02.02 (ETS 300 904): "Digital cellular telecommunication system
(Phase 2+); Bearer Services (BS) supported by a GSM Public Land Mobile
Network (PLMN)".
[2] GSM 02.03 (ETS 300 905): "Digital cellular telecommunication system
(Phase 2+); Teleservices supported by a GSM Public Land Mobile Network
(PLMN)".
[3] GSM 02.81: "Digital cellular telecommunication system; Line identification
supplementary services - Stage 1".

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[4] GSM 02.82: "Digital cellular telecommunication system; Call Forwarding (CF)
supplementary services - Stage 1".
[5] GSM 02.83: "Digital cellular telecommunication system; Call Waiting (CW) and
Call Hold (HOLD) supplementary services - Stage 1".
[6] GSM 02.88: "Digital cellular telecommunication system; Call Barring (CB)
supplementary services - Stage 1".
[7] GSM 03.03 (ETS 300 927): "Digital cellular telecommunication system
(Phase 2+); Numbering, addressing and identification".
[8] GSM 04.08 (ETS 300 940): "Digital cellular telecommunication system
(Phase 2+); Mobile radio interface layer 3 specification".
[9] GSM MoU SE.13, GSM MoU Permanent Reference Document SE.13: "GSM
Mobile Network Codes and Names".
[10] ITU-T Recommendation E.212: "Identification plan for land mobile stations".
[11] ITU-T Recommendation T.31: "Asynchronous facsimile DCE control, service
class 1".
[12] ITU-T Recommendation T.32: "Asynchronous facsimile DCE control, service
class 2".
[13] ITU-T Recommendation T.50: "International Reference Alphabet (IRA)
(Formerly International Alphabet No. 5 or IA5) - Information technology - 7-bit
coded character set for information exchange".
[14] ITU-T Draft new Recommendation V.25ter: "Serial asynchronous automatic
dialling and control".
[15] Telecommunications Industry Association TIA IS-99: "Data Services Option
Standard for Wideband Spread Spectrum Digital Cellular System".
[16] Telecommunications Industry Association TIA IS-135: "800 MHz Cellular
Systems, TDMA Services, Async Data and Fax".
[17] Portable Computer and Communications Association PCCA STD-101 Data
Transmission Systems and Equipment: "Serial Asynchronous Automatic Dialling
and Control for Character Mode DCE on Wireless Data Services".
[18] GSM 04.22 (ETS 300 946): "Digital cellular telecommunication system
(Phase 2+); Radio Link Protocol (RLP) for data and telematic services on the
Mobile Station - Base Station System (MS - BSS) interface and the Base Station
System - Mobile-services Switching Centre (BSS - MSC) interface".
[19] GSM 02.30 (ETS 300 907): "Digital cellular telecommunication system
(Phase 2+); Man Machine Interface (MMI) of the Mobile Station (MS)".
[20] GSM 05.08 (ETS 300 578): "Digital cellular telecommunication system
(Phase 2); Radiosubsystem link control".
[21] GSM 02.85: "Digital cellular telecommunication system; Closed User Group
(CUG) supplementary services - Stage 1".
[22] GSM 02.84: "Digital cellular telecommunication system; MultiParty (MPTY)
supplementary services - Stage 1".
[23] GSM 02.90: "Digital cellular telecommunication system; Stage 1 description of
Unstructured Supplementary Service Data (USSD)".

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[24] GSM 07.05: "Digital cellular telecommunication system (Phase 2+); Use of Data
Terminal Equipment - Data Circuit terminating Equipment (DTE - DCE) interface
for Short Message Service (SMS) and Cell Broadcast Service (CBS)".
[25] GSM 03.38 (ETS 300 900): "Digital cellular telecommunication system
(Phase 2+); Alphabet and language specific information".
[26] GSM 02.24 (ETS 300 923): "Digital cellular telecommunication system;
Description of Charge Advice Information (CAI)".
[27] GSM 02.86: "Digital cellular telecommunication system; Advice of Charge (AoC)
supplementary services - Stage 1".
[28] GSM 11.11 (ETS 300 977): "Digital cellular telecommunication system
(Phase 2+); Specification of the Subscriber Identity Module - Mobile Equipment
(SIM-ME) interface".
[29] GSM 02.34: "Digital cellular telecommunication system (Phase 2+); High Speed
Circuit Switched Data (HSCSD) - Stage 1”.
[30] GSM 02.91: "Digital cellular telecommunication system (Phase 2+); Explicit Call
Transfer (ECT) supplementary service - Stage 1”.
[31] GSM 02.72: "Digital cellular telecommunication system (Phase 2+); Call
Deflection (CD) supplementary service - Stage 1”.
[32] ISO/IEC10646: "Universal Multiple-Octet Coded Character Set (UCS)”; UCS2,
16 bit coding.
[33] GSM 02.22: "Digital cellular telecommunication system (Phase 2+);
Personalisation of GSM Mobile Equipment (ME) Mobile functionality
specification”.
[34] GSM 07.60: "Digital cellular telecommunication system (Phase 2+); General
requirements on Mobile Stations (MS) supporting General Packet Radio Bearer
Service (GPRS)".
[35] CCITT Recommendation V.110: "Support of data terminal equipments (DTEs)
with V-Series interfaces by an integrated services digital network".
[36] CCITT Recommendation V.120: "Support by an ISDN of data terminal
equipment with V-Series type interfaces with provision for statistical
multiplexing".
[37] ITU-T Recommendation X.31: "Support of packet mode terminal equipment by
an ISDN".
3 Abbreviations and definitions
3.1 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
AT ATtention; this two-character abbreviation is always used to start a command line to be
sent from TE to TA
BCD Binary Coded Decimal
ETSI European Telecommunications Standards Institute
HSCSD High Speed Circuit Switched Data
IMEI International Mobile station Equipment Identity
IRA International Reference Alphabet (ITU-T T.50 [13])
IrDA Infrared Data Association
ISO International Standards Organisation

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ITU-T International Telecommunication Union - Telecommunications Standardization Sector
ME Mobile Equipment, e.g. a GSM phone (equal to MS; Mobile Station)
MoU Memorandum of Understanding (GSM operator joint)
PCCA Portable Computer and Communications Association
RDI Restricted Digital Information
RLP Radio Link Protocol
SIM Subscriber Identity Module
TA Terminal Adaptor, e.g. a GSM data card (equal to DCE; Data Circuit terminating
Equipment)
TE Terminal Equipment, e.g. a computer (equal to DTE; Data Terminal Equipment)
TIA Telecommunications Industry Association
UDI Unrestricted Digital Information
3.2 Definitions
For the purposes of this ETS, the following syntactical definitions apply (refer also clause 4):
...