TS 100 916 - V7.5.0 - Digital cellular telecommunications system (Phase 2+); AT command set for GSM Mobile Equipment (ME) (GSM 07.07 version 7.5.0 Release 1998)

127 Pages·0.57 MB·English

by  European Telecommunications Standards Institute

ETSI TS 100 916
V7.5.0
(1999-12)
TechnicalSpecification
Digital cellular telecommunications system (Phase 2+);
AT command set for GSM Mobile Equipment (ME)
(GSM 07.07 version 7.5.0 Release 1998)
R
GLOBALSYSTEM FOR
MOBILECOMMUNICATIONS
(GSM07.07version7.5.0Release1998) 2 ETSITS100916V7.5.0(1999-12)
Reference
RTS/SMG-040707Q7R2
Keywords
Digitalcellulartelecommunicationssystem,
GlobalSystemforMobilecommunications(GSM)
ETSI
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Nopartmaybereproducedexceptasauthorizedbywrittenpermission.
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©EuropeanTelecommunicationsStandardsInstitute1999.
Allrightsreserved.
ETSI
(GSM07.07version7.5.0Release1998) 3 ETSITS100916V7.5.0(1999-12)
Contents
IntellectualPropertyRights................................................................................................................................7
Foreword............................................................................................................................................................7
Introduction........................................................................................................................................................7
1 Scope........................................................................................................................................................8
2 References................................................................................................................................................8
3 Abbreviationsanddefinitions................................................................................................................10
3.1 Abbreviations...................................................................................................................................................10
3.2 Definitions........................................................................................................................................................11
4 ATcommandsyntax..............................................................................................................................11
4.1 Commandline..................................................................................................................................................12
4.2 Informationresponsesandresultcodes............................................................................................................12
4.3 ITU-TV.25ter[14]TE-TAinterfacecommands.............................................................................................13
5 Generalcommands.................................................................................................................................13
5.1 Requestmanufactureridentification+CGMI...................................................................................................13
5.2 Requestmodelidentification+CGMM............................................................................................................14
5.3 Requestrevisionidentification+CGMR..........................................................................................................14
5.4 Requestproductserialnumberidentification+CGSN.....................................................................................15
5.5 SelectTEcharacterset+CSCS........................................................................................................................15
5.6 Requestinternationalmobilesubscriberidentity+CIMI..................................................................................16
5.7 Multiplexingmode+CMUX$(MUXMS-TE)$.............................................................................................16
5.8 ITU-TV.25ter[14]genericTAcontrolcommands.........................................................................................18
5.9 PCCASTD-101[17]selectwirelessnetwork+WS46.....................................................................................18
5.10 Informativeexamples.......................................................................................................................................19
6 Callcontrolcommandsandmethods.....................................................................................................20
6.1 Selecttypeofaddress+CSTA..........................................................................................................................20
6.2 ITU-TV.25ter[14]dialcommandD...............................................................................................................20
6.3 Directdiallingfromphonebooks......................................................................................................................21
6.4 Callmode+CMOD..........................................................................................................................................22
6.5 Hangupcall+CHUP.........................................................................................................................................22
6.6 Alternatingmodecallcontrolmethod..............................................................................................................23
6.7 Selectbearerservicetype+CBST....................................................................................................................25
6.8 Radiolinkprotocol+CRLP..............................................................................................................................26
6.9 Servicereportingcontrol+CR..........................................................................................................................27
6.10 Extendederrorreport+CEER..........................................................................................................................28
6.11 Cellularresultcodes+CRC..............................................................................................................................28
6.12 HSCSDdeviceparameters+CHSD..................................................................................................................29
6.13 HSCSDtransparentcallconfiguration+CHST................................................................................................30
6.14 HSCSDnon-transparentcallconfiguration+CHSN........................................................................................30
6.15 HSCSDcurrentcallparameters+CHSC..........................................................................................................31
6.16 HSCSDparametersreport+CHSR$(ATR98)$...............................................................................................31
6.17 HSCSDautomaticuserinitiatedupgrading+CHSU$(ATR98)$....................................................................32
6.18 Singlenumberingscheme+CSNS....................................................................................................................33
6.19 VoiceHangupControl+CVHU$(ATR97)$..................................................................................................33
6.20 V.120rateadaptionprotocol+CV120.............................................................................................................34
6.21 ITU-TV.25ter[14]callcontrolcommands......................................................................................................36
6.22 ITU-TV.25ter[14]datacompressioncommands............................................................................................36
6.23 Informativeexamples.......................................................................................................................................36
7 Networkservicerelatedcommands.......................................................................................................37
7.1 Subscribernumber+CNUM.............................................................................................................................37
7.2 Networkregistration+CREG...........................................................................................................................38
7.3 Operatorselection+COPS...............................................................................................................................39
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7.4 Facilitylock+CLCK........................................................................................................................................40
7.5 Changepassword+CPWD...............................................................................................................................42
7.6 Callinglineidentificationpresentation+CLIP.................................................................................................43
7.7 Callinglineidentificationrestriction+CLIR....................................................................................................44
7.8 Connectedlineidentificationpresentation+COLP..........................................................................................45
7.9 Closedusergroup+CCUG...............................................................................................................................45
7.10 Callforwardingnumberandconditions+CCFC..............................................................................................46
7.11 Callwaiting+CCWA.......................................................................................................................................48
7.12 Callrelatedsupplementaryservices+CHLD...................................................................................................49
7.13 Calldeflection+CTFR.....................................................................................................................................50
7.14 Unstructuredsupplementaryservicedata+CUSD...........................................................................................50
7.15 AdviceofCharge+CAOC...............................................................................................................................52
7.16 Supplementaryservicenotifications+CSSN....................................................................................................52
7.17 Listcurrentcalls+CLCC..................................................................................................................................54
7.18 Preferredoperatorlist+CPOL$(ATR97)$....................................................................................................55
7.19 Readoperatornames+COPN$(ATR97)$.....................................................................................................56
7.20 Informativeexamples.......................................................................................................................................56
8 MobileEquipmentcontrolandstatuscommands..................................................................................58
8.1 Phoneactivitystatus+CPAS............................................................................................................................59
8.2 Setphonefunctionality+CFUN.......................................................................................................................59
8.3 EnterPIN+CPIN.............................................................................................................................................60
8.4 Batterycharge+CBC.......................................................................................................................................61
8.5 Signalquality+CSQ.........................................................................................................................................62
8.6 MobileEquipmentcontrolmode+CMEC.......................................................................................................62
8.7 Keypadcontrol+CKPD...................................................................................................................................63
8.8 Displaycontrol+CDIS.....................................................................................................................................64
8.9 Indicatorcontrol+CIND..................................................................................................................................65
8.10 MobileEquipmenteventreporting+CMER....................................................................................................66
8.11 Selectphonebookmemorystorage+CPBS......................................................................................................67
8.12 Readphonebookentries+CPBR......................................................................................................................68
8.13 Findphonebookentries+CPBF.......................................................................................................................69
8.14 Writephonebookentry+CPBW......................................................................................................................70
8.15 Clock+CCLK...................................................................................................................................................70
8.16 Alarm+CALA..................................................................................................................................................71
8.17 GenericSIMaccess+CSIM.............................................................................................................................72
8.18 RestrictedSIMaccess+CRSM........................................................................................................................72
8.19 Securecontrolcommand+CSCC.....................................................................................................................73
8.20 Alertsoundmode+CALM$(ATR97)$..........................................................................................................74
8.21 Ringersoundlevel+CRSL$(ATR97)$..........................................................................................................75
8.22 Vibratormode+CVIB$(ATR97)$.................................................................................................................75
8.23 Loudspeakervolumelevel+CLVL$(ATR97)$.............................................................................................76
8.24 Mutecontrol+CMUT$(ATR97)$.................................................................................................................76
8.25 Accumulatedcallmeter+CACM$(ATR97)$................................................................................................77
8.26 Accumulatedcallmetermaximum+CAMM$(ATR97)$...............................................................................77
8.27 Priceperunitandcurrencytable+CPUC$(ATR97)$....................................................................................78
8.28 CallMetermaximumevent+CCWE$(ATR98)$...........................................................................................78
8.29 Powerclass+CPWC$(ATR98)$....................................................................................................................79
8.30 SetLanguage+CLAN$(ATR98)$..................................................................................................................80
8.31 LanguageEvent+CLAE$(ATR98)$...............................................................................................................81
8.32 SetGreetingText+CSGT$(ATR98)$............................................................................................................81
8.33 SetVoiceMailNumber+CSVM$(ATR98)$.................................................................................................82
8.34 RingMelodyPlayback+CRMP$(ATR98)$...................................................................................................83
8.35 MasterReset+CMAR$(ATR98)$..................................................................................................................83
8.36 ListallavailableATcommands+CLAC$(ATR98)$.....................................................................................84
8.37 Informativeexamples.......................................................................................................................................84
9 MobileEquipmenterrors.......................................................................................................................88
9.1 ReportMobileEquipmenterror+CMEE.........................................................................................................88
9.2 MobileEquipmenterrorresultcode+CMEERROR.......................................................................................88
9.2.1 Generalerrors.............................................................................................................................................89
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9.2.2 GPRS-relatederrors....................................................................................................................................90
9.2.2.1 ErrorsrelatedtoafailuretoperformanAttach.....................................................................................90
9.2.2.2 ErrorsrelatedtoafailuretoActivateaContext....................................................................................91
9.2.2.3 OtherGPRSerrors................................................................................................................................91
9.3 Informativeexamples.......................................................................................................................................91
10 CommandsforGPRS.............................................................................................................................91
10.1 CommandsspecifictoMTssupportingtheGPRS...........................................................................................92
10.1.1 DefinePDPContext+CGDCONT.............................................................................................................92
10.1.2 QualityofServiceProfile(Requested)+CGQREQ....................................................................................94
10.1.3 QualityofServiceProfile(Minimumacceptable)+CGQMIN...................................................................95
10.1.4 GPRSattachordetach+CGATT................................................................................................................96
10.1.5 PDPcontextactivateordeactivate+CGACT.............................................................................................96
10.1.6 Enterdatastate+CGDATA........................................................................................................................98
10.1.7 ConfigurelocalOctetStreamPADparameters+CGCLOSP.....................................................................99
10.1.8 ShowPDPaddress+CGPADDR..............................................................................................................100
10.1.9 AutomaticresponsetoanetworkrequestforPDPcontextactivation+CGAUTO...................................101
10.1.10 ManualresponsetoanetworkrequestforPDPcontextactivation+CGANS..........................................102
10.1.11 GPRSmobilestationclass+CGCLASS...................................................................................................103
10.1.12 Configurelocaltriple-XPADparameters+CGCLPAD...........................................................................104
10.1.13 GPRSeventreporting+CGEREP.............................................................................................................105
10.1.14 GPRSnetworkregistrationstatus+CGREG.............................................................................................106
10.1.15 SelectserviceforMOSMSmessages+CGSMS......................................................................................107
10.2 Modemcompatibilitycommands...................................................................................................................108
10.2.1 MToriginatedPDPcontextactivation.....................................................................................................108
10.2.1.1 RequestGPRSservice'D'...................................................................................................................108
10.2.1.2 RequestGPRSIPservice'D'...............................................................................................................109
10.2.2 NetworkrequestedPDPcontextactivation...............................................................................................110
10.2.2.1 AutomaticresponsetoanetworkrequestforPDPcontextactivation'S0'..........................................110
10.2.2.2 ManualacceptanceofanetworkrequestforPDPcontextactivation'A'............................................110
10.2.2.3 ManualrejectionofanetworkrequestforPDPcontextactivation'H'................................................111
AnnexA(normative): Summaryofcommandsfromotherstandards.........................................112
AnnexB(normative): Summaryofresultcodes.............................................................................114
AnnexC(informative): CommandsfromTIAIS-101......................................................................115
C.1 Introduction..........................................................................................................................................115
C.2 Commands............................................................................................................................................116
C.2.1 Selectmode+FCLASS...................................................................................................................................116
C.2.2 Bufferthresholdsetting+VBT.......................................................................................................................116
C.2.3 CallingnumberIDpresentation+VCID.........................................................................................................117
C.2.4 Receivegainselection+VGR.........................................................................................................................117
C.2.5 Transmitgainselection+VGT.......................................................................................................................117
C.2.6 Initialisevoiceparameters+VIP....................................................................................................................118
C.2.7 Inactivitytimer+VIT.....................................................................................................................................118
C.2.8 Lineselection+VLS.......................................................................................................................................118
C.2.9 Receivedatastate+VRX................................................................................................................................120
C.2.10 Selectcompressionmethod+VSM................................................................................................................120
C.2.11 DTMFandtonegeneration+VTS..................................................................................................................120
C.2.12 Toneduration+VTD......................................................................................................................................121
C.2.13 Transmitdatastate+VTX..............................................................................................................................121
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AnnexD(informative): Bibliography.................................................................................................122
AnnexE(informative): Mobileoriginatedalternatingvoice/datacallexample............................123
AnnexF(informative): Mobileterminatedvoicefollowedbydatacallexample..........................124
AnnexG(informative): Voicecallexample.......................................................................................125
AnnexH(informative): ChangeHistory............................................................................................126
History............................................................................................................................................................127
ETSI
(GSM07.07version7.5.0Release1998) 7 ETSITS100916V7.5.0(1999-12)
Intellectual Property Rights
IPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.Theinformation
pertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefound
inSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespect
ofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver
(http://www.etsi.org/ipr).
PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.Noguarantee
canbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)
whichare,ormaybe,ormaybecome,essentialtothepresentdocument.
Foreword
ThisTechnicalSpecification(TS)hasbeenproducedbytheSpecialMobileGroup(SMG).
ThepresentdocumentspecifiestheATcommandforterminalequipmentbeingusedwithinthedigitalcellular
telecommunicationssystem.
ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMG
approval.ShouldSMGmodifythecontentsofthepresentdocument,itwillbere-releasedwithanidentifyingchangeof
releasedateandanincreaseinversionnumberasfollows:
Version7.x.y
where:
7 indicatesRelease1998ofGSMPhase2+.
x theseconddigitisincrementedforallothertypesofchanges,i.e.technicalenhancements,corrections,
updates,etc.
y thethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.
Introduction
Thepresentdocumentincludessomefeatureswhicharenewtothisrelease98versionGSM07.07.Inordertomakeit
easierforreadersofthepresentdocumenttofindthesenewfeaturescomparedtotherelease96version,specialmarkers
areusedinthetext.Thefollowingtablelistsallthenewrelease97andrelease98featuresandthecorrespondingmarker
foreachfeature.
Feature Designator
Technicalenhancementandimprovement:NewAT-commands $(ATR97)$
Technicalenhancementandimprovement:NewAT-commands $(ATR98)$
SupportofMultiplexeraccordingtoGSM07.10 $(MUXMS-TE)$
ETSI
(GSM07.07version7.5.0Release1998) 8 ETSITS100916V7.5.0(1999-12)
1 Scope
ThepresentdocumentspecifiesaprofileofATcommandsandrecommendsthatthisprofilebeusedforcontrolling
MobileEquipment(ME)functionsandGSMnetworkservicesfromaTerminalEquipment(TE)throughTerminal
Adaptor(TA).Thecommandprefix+CisreservedforDigitalCellularinITU-TRecommendationV.25ter[14].The
presentdocumenthasalsothesyntaxdetailsusedtoconstructtheseextendedGSMcommands.CommandsfromITU-T
RecommendationV.25ter[14]andexistingdigitalcellularstandards(TIAIS-99[15]andTIAIS-135[16])areused
wheneverapplicable.SomeofthenewcommandsaredefinedinsuchawaythattheycanbeeasilyappliedtoMEof
networksotherthanGSM.ITU-TT.31[11]andT.32[12]faxATcommandsmaybeusedforGSMfaxtransmission
fromTE.GSMShortMessageServiceATcommandsaredefinedinGSM07.05[24].GPRSATcommandsaredefined
inclause10ofthepresentdocument.ThepresentdocumentassumesanabstractarchitecturecomprisingaTE(e.g.a
computer)andaMEinterfacedbyaTA(seefigure1).Thespanofcontrolofthedefinedcommandsshouldallowto
handleanyphysicalimplementationthatthisabstractarchitecturemayleadto:
- TA,MEandTEasthreeseparateentities;
- TAintegratedundertheMEcover,andtheTEimplementedasaseparateentity;
- TAintegratedundertheTEcover,andtheMEimplementedasaseparateentity;
- TAandMEintegratedundertheTEcoverasasingleentity.
ThecommandsdescribedinthepresentdocumentmaybeobservedonthelinkbetweentheTEandtheTA.However,
mostofthecommandsretrieveinformationabouttheME,notabouttheTA.
responses MEstatus
TE TA ME
ATcmds MEcontrol
networkmessages
USER&APPLICATIONS NETWORK
Figure 1:Setup
InterfacebetweenTEandTAisintendedtooperateoverexistingserial(ITU-TRecommendationV.24)cables,infrared
link,andalllinktypeswithsimilarbehaviour.Forcorrectoperationmanyofthedefinedcommandsrequireeightbit
dataandthereforeitisrecommendedthatTE-TAlinkissettoeightbits/bytemode.(Forinfraredoperation
implementationreferinformativereferencesIrDA.ForembeddingATcommandsanddataduringon-linedatastate
referTIA-617/ITU-TV.80.)InterfacebetweenTAandMEisdependentontheinterfaceintheME.
2 References
Thefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresent
document.
• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-
specific.
• Foraspecificreference,subsequentrevisionsdonotapply.
• Foranon-specificreference,thelatestversionapplies.
• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesame
number.
• ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).
ETSI
(GSM07.07version7.5.0Release1998) 9 ETSITS100916V7.5.0(1999-12)
[1] GSM02.02:"Digitalcellulartelecommunicationsystem(Phase2+);BearerServices(BS)
supportedbyaGSMPublicLandMobileNetwork(PLMN)".
[2] GSM02.03:"Digitalcellulartelecommunicationsystem(Phase2+);Teleservicessupportedbya
GSMPublicLandMobileNetwork(PLMN)".
[3] GSM02.81:"Digitalcellulartelecommunicationsystem(Phase2+);Lineidentification
supplementaryservices-Stage1".
[4] GSM02.82:"Digitalcellulartelecommunicationsystem(Phase2+);CallForwarding(CF)
supplementaryservices-Stage1".
[5] GSM02.83:"Digitalcellulartelecommunicationsystem(Phase2+);CallWaiting(CW)andCall
Hold(HOLD)supplementaryservices-Stage1".
[6] GSM02.88:"Digitalcellulartelecommunicationsystem(Phase2+);CallBarring(CB)
supplementaryservices-Stage1".
[7] GSM03.03:"Digitalcellulartelecommunicationsystem(Phase2+);Numbering,addressingand
identification".
[8] GSM04.08:"Digitalcellulartelecommunicationsystem(Phase2+);Mobileradiointerfacelayer3
specification".
[9] GSMMoUSE.13,GSMMoUPermanentReferenceDocumentSE.13:"GSMMobileNetwork
CodesandNames".
[10] ITU-TRecommendationE.212:"Identificationplanforlandmobilestations".
[11] ITU-TRecommendationT.31:"AsynchronousfacsimileDCEcontrol,serviceclass1".
[12] ITU-TRecommendationT.32:"AsynchronousfacsimileDCEcontrol,serviceclass2".
[13] ITU-TRecommendationT.50:"InternationalReferenceAlphabet(IRA)(FormerlyInternational
AlphabetNo.5orIA5)-Informationtechnology-7-bitcodedcharactersetforinformation
exchange".
[14] ITU-TDraftnewRecommendationV.25ter:"Serialasynchronousautomaticdiallingandcontrol".
[15] TelecommunicationsIndustryAssociationTIAIS-99:"DataServicesOptionStandardfor
WidebandSpreadSpectrumDigitalCellularSystem".
[16] TelecommunicationsIndustryAssociationTIAIS-135:"800MHzCellularSystems,TDMA
Services,AsyncDataandFax".
[17] PortableComputerandCommunicationsAssociationPCCASTD-101DataTransmissionSystems
andEquipment:"SerialAsynchronousAutomaticDiallingandControlforCharacterModeDCE
onWirelessDataServices".
[18] GSM04.22:"Digitalcellulartelecommunicationsystem(Phase2+);RadioLinkProtocol(RLP)
fordataandtelematicservicesontheMobileStation-BaseStationSystem(MS-BSS)interface
andtheBaseStationSystem-Mobile-servicesSwitchingCentre(BSS-MSC)interface".
[19] GSM02.30:"Digitalcellulartelecommunicationsystem(Phase2+);ManMachineInterface
(MMI)oftheMobileStation(MS)".
[20] GSM05.08:"Digitalcellulartelecommunicationsystem(Phase2+);Radiosubsystemlink
control".
[21] GSM02.85:"Digitalcellulartelecommunicationsystem(Phase2+);ClosedUserGroup(CUG)
supplementaryservices-Stage1".
[22] GSM02.84:"Digitalcellulartelecommunicationsystem(Phase2+);MultiParty(MPTY)
supplementaryservices-Stage1".
ETSI
(GSM07.07version7.5.0Release1998) 10 ETSITS100916V7.5.0(1999-12)
[23] GSM02.90:"Digitalcellulartelecommunicationsystem(Phase2+);Stage1descriptionof
UnstructuredSupplementaryServiceData(USSD)".
[24] GSM07.05:"Digitalcellulartelecommunicationsystem(Phase2+);UseofDataTerminal
Equipment-DataCircuitterminatingEquipment(DTE-DCE)interfaceforShortMessage
Service(SMS)andCellBroadcastService(CBS)".
[25] GSM03.38:"Digitalcellulartelecommunicationsystem(Phase2+);Alphabetandlanguage
specificinformation".
[26] GSM02.24:"Digitalcellulartelecommunicationsystem(Phase2+);DescriptionofChargeAdvice
Information(CAI)".
[27] GSM02.86:"Digitalcellulartelecommunicationsystem(Phase2+);AdviceofCharge(AoC)
supplementaryservices-Stage1".
[28] GSM11.11:"Digitalcellulartelecommunicationsystem(Phase2+);Specificationofthe
SubscriberIdentityModule-MobileEquipment(SIM-ME)interface".
[29] GSM02.34: "Digitalcellulartelecommunicationsystem(Phase2+);HighSpeedCircuitSwitched
Data(HSCSD)-Stage1".
[30] GSM02.91:"Digitalcellulartelecommunicationsystem(Phase2+);ExplicitCallTransfer(ECT)
supplementaryservice-Stage1".
[31] GSM02.72:"Digitalcellulartelecommunicationsystem(Phase2+);CallDeflection(CD)
supplementaryservice-Stage1".
[32] ISO/IEC10646:"UniversalMultiple-OctetCodedCharacterSet(UCS)";UCS2,16bitcoding.
[33] GSM02.22:"Digitalcellulartelecommunicationsystem(Phase2+);PersonalisationofGSM
MobileEquipment(ME)Mobilefunctionalityspecification".
[34] GSM07.60:"Digitalcellulartelecommunicationsystem(Phase2+);Generalrequirementson
MobileStations(MS)supportingGeneralPacketRadioBearerService(GPRS)".
[35] CCITTRecommendationV.110:"Supportofdataterminalequipments(DTEs)withV-Series
interfacesbyanintegratedservicesdigitalnetwork".
[36] CCITTRecommendationV.120:"SupportbyanISDNofdataterminalequipmentwithV-Series
typeinterfaceswithprovisionforstatisticalmultiplexing".
[37] ITU-TRecommendationX.31:"SupportofpacketmodeterminalequipmentbyanISDN".
[38] GSM05.05:"Digitalcellulartelecommunicationsystem(Phase2+);Radiotransmissionand
reception".
[39] GSM09.61:"Digitalcellulartelecommunicationsystem(Phase2+);GeneralPacketRadioService
(GPRS);InterworkingbetweenthePublicLandMobileNetwork(PLMN)supportingGPRSand
PacketDataNetworks(PDN)".
[40] GSM03.81:"Digitalcellulartelecommunicationsystem(Phase2+);Lineidentification
supplementaryservices-Stage2".
3 Abbreviations and definitions
3.1 Abbreviations
Forthepurposesofthepresentdocument,thefollowingabbreviationsapply:
AT ATtention;thistwo-characterabbreviationisalwaysusedtostartacommandlinetobesentfrom
TEtoTA
ETSI