Sierra Wireless UMTS Installation manual

2130617
Rev 2.4
UMTS Modems
Supported AT Command Reference
Includes:
AC850
AC860
AC875 / AC875U
AC880 / AC880E / AC880U
AC881 / AC881E / AC881U
MC8755 / MC8755V / MC8765
MC8775 / MC8775V
MC8780 / MC8781

Preface
Rev 2.4 Jan.08 Proprietary and Confidential 1
Important Notice Duetothenatureofwirelesscommunications,transmission
andreceptionofdatacanneverbeguaranteed.Datamaybe
delayed,corrupted(i.e.,haveerrors)orbetotallylost.
Althoughsignificantdelaysorlossesofdataarerarewhen
wirelessdevicessuchastheSierraWirelessmodemareusedin
anormalmannerwithawell‐constructednetwork,theSierra
Wirelessmodemshouldnotbeusedinsituationswherefailure
totransmitorreceivedatacouldresultindamageofanykind
totheuseroranyotherparty,includingbutnotlimitedto
personalinjury,death,orlossofproperty.SierraWireless
acceptsnoresponsibilityfordamagesofanykindresulting
fromdelaysorerrorsindatatransmittedorreceivedusingthe
SierraWirelessmodem,orforfailureoftheSierraWireless
modemtotransmitorreceivesuchdata.
Safety and Hazards DonotoperatetheSierraWirelessmodeminareaswhere
blastingisinprogress,whereexplosiveatmospheresmaybe
present,nearmedicalequipment,nearlifesupportequipment,
oranyequipmentwhichmaybesusceptibletoanyformof
radiointerference.Insuchareas,theSierraWirelessmodem
MUSTBEPOWEREDOFF.TheSierraWirelessmodemcan
transmitsignalsthatcouldinterferewiththisequipment.
DonotoperatetheSierraWirelessmodeminanyaircraft,
whethertheaircraftisonthegroundorinflight.Inaircraft,the
SierraWirelessmodemMUSTBEPOWEREDOFF.When
operating,theSierraWirelessmodemcantransmitsignalsthat
couldinterferewithvariousonboardsystems.
Note: Some airlines may permit the use of cellular phones while the
aircraft is on the ground and the door is open. Sierra Wireless
modems may be used at this time.
Thedriveroroperatorofanyvehicleshouldnotoperatethe
SierraWirelessmodemwhileincontrolofavehicle.Doingso
willdetractfromthedriveroroperatorʹscontrolandoperation
ofthatvehicle.Insomestatesandprovinces,operatingsuch
communicationsdeviceswhileincontrolofavehicleisan
offence.
Limitation of
Liability
Theinformationinthismanualissubjecttochangewithout
noticeanddoesnotrepresentacommitmentonthepartof
SierraWireless.SIERRAWIRELESSANDITSAFFILIATES
SPECIFICALLYDISCLAIMLIABILITYFORANYANDALL
DIRECT,INDIRECT,SPECIAL,GENERAL,INCIDENTAL,
CONSEQUENTIAL,PUNITIVEOREXEMPLARYDAMAGES
INCLUDING,BUTNOTLIMITEDTO,LOSSOFPROFITSOR

Supported AT Command Reference
2 Proprietary and Confidential 2130617
REVENUEORANTICIPATEDPROFITSORREVENUE
ARISINGOUTOFTHEUSEORINABILITYTOUSEANY
SIERRAWIRELESSPRODUCT,EVENIFSIERRAWIRELESS
AND/ORITSAFFILIATESHASBEENADVISEDOFTHE
POSSIBILITYOFSUCHDAMAGESORTHEYARE
FORESEEABLEORFORCLAIMSBYANYTHIRDPARTY.
Notwithstandingtheforegoing,innoeventshallSierra
Wirelessand/oritsaffiliatesaggregateliabilityarisingunderor
inconnectionwiththeSierraWirelessproduct,regardlessof
thenumberofevents,occurrences,orclaimsgivingriseto
liability,beinexcessofthepricepaidbythepurchaserforthe
SierraWirelessproduct.
Patents Portionsofthisproductmaybecoveredbysomeorallofthe
followingUSpatents:
5,515,013 5,629,960 5,845,216 5,847,553 5,878,234
5,890,057 5,929,815 6,169,884 6,191,741 6,199,168
6,339,405 6,359,591 6,400,336 6,516,204 6,561,851
6,643,501 6,653,979 6,697,030 6,785,830 6,845,249
6,847,830 6,876,697 6,879,585 6,886,049 6,968,171
6,985,757 7,023,878 7,053,843 7,106,569 7,145,267
7,200,512 D442,170 D459,303
andotherpatentspending.
Thisproductincludes
technologylicensedfrom:
LicensedbyQUALCOMMIncorporatedunderoneormoreof
thefollowingUnitedStatespatentsand/ortheircounterparts
inothernations:
4,901,307 5,056,109 5,101,501 5,109,390 5,228,054
5,267,261 5,267,262 5,337,338 5,414,796 5,416,797
5,490,165 5,504,773 5,506,865 5,511,073 5,535,239
5,544,196 5,568,483 5,600,754 5,657,420 5,659,569
5,710,784 5,778,338
ManufacturedorsoldbySierraWirelessoritslicenseesunder
oneormorepatentslicensedfromInterDigitalGroup.
Copyright ©2008SierraWireless.Allrightsreserved.
Trademarks AirCard®and“HeartoftheWirelessMachine®”areregistered
trademarksofSierraWireless.Watcher®isatrademarkof
SierraWireless,registeredintheEuropeanCommunity.
SierraWireless,theSierraWirelesslogo,theredwavedesign,
andthered‐tippedantennaaretrademarksofSierraWireless.
QUALCOMM
®
3G

Preface
Rev 2.4 Jan.08 Proprietary and Confidential 3
Windows®isaregisteredtrademarkofMicrosoftCorporation.
QUALCOMM®isaregisteredtrademarkofQUALCOMM
Incorporated.Usedunderlicense.
Othertrademarksarethepropertyoftherespectiveowners.
Contact
Information
Consultourwebsiteforup‐to‐dateproductdescriptions,
documentation,applicationnotes,firmwareupgrades,trouble‐
shootingtips,andpressreleases:
www.sierrawireless.com
Revision History
Sales Desk: Phone: [phone]
Hours: 8:00 AM to 5:00 PM Pacific Time
E-mail: [email protected]
Post: Sierra Wireless
13811 Wireless Way
Richmond, BC
Canada V6V 3A4
Fax: [phone]
Web: www.sierrawireless.com
Revision
number Release date Changes
2.3 Jul 2007 •fixed !TIME (page 48) syntax
•added +ECIO (page 31), !GSMINFO (page 32), !NVPORTSET
(page 35), !SMSSTSEN (page 43) commands
•added detail for !SMSRETRY (page 42)
2.4 Jan 2008 •updated !TIME (page 48) syntax

Supported AT Command Reference
4 Proprietary and Confidential 2130617

Rev 2.4 Jan.08 5
Table of Contents
About this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Result codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Terminology and acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Current firmware versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Document structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Supported GSM / WCDMA AT Commands . . . . . . . . . . . . . . . . . .15
Modem Status, Customization, and Reset Commands . . . . . . . .25
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Command summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Command reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Diagnostic Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Command summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Command reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Test commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Command summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Command reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Supported AT Command Reference
62130617
Memory Management Commands . . . . . . . . . . . . . . . . . . . . . . . . . 59
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Command summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Command reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
SIM Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Command summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Command reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

1
Rev 2.4 Jan.08 7
1: About this Guide
•Introduction
•Result codes
•Terminology and
acronyms
•Current firmware
versions
•Document structure
•Conventions Introduction
ThisdocumentdescribesstandardandproprietaryAT
commandsthatareavailableforusersofUMTSAirCard
modemsandMiniCardembeddedmodules.
Thestandard3GPPATcommandsforUMTSdevicesare
describedintwostandardsdocumentsavailablefromthe
3GPP(3rdGenerationPartnershipProject)website,
www.3gpp.org:
•TS27.007ATcommandsetforUserEquipment(UE)
•TS27.005UseofDataTerminalEquipment‐‐DataCircuit
terminatingEquipment(DTE‐DCE)interfaceforShortMessage
Service(SMS)andCellBroadcastService(BSE)
TheproprietaryATcommandsaresupplementaltothe
standardATcommands.
Fornormaloperationofthemodem,consulttheGSMAT
CommandReference(documentnumber2130213).Youmayalso
wanttoconsulttheotherdocumentsavailableintheAC8xx/
MC87xxDevelopmentKitoronourInternetsiteat
www.sierrawireless.com
Note: Some standard 3GPP commands are NOT supported, or are
partially supported. These commands are identified in Supported
GSM / WCDMA AT Commands, page 15.
Note: When designing applications that use these AT commands, use
Watcher®(and other Sierra Wireless applications) as functionality
templates to ensure proper use of command groups. For questions or
concerns relating to command implementation, please contact your
Sierra Wireless account representative.

Supported AT Command Reference
82130617
Result codes
Resultcodesarenotshowninthecommandtablesunless
specialconditionsapply.GenerallytheresultcodeOKis
returnedwhenthecommandhasbeenexecuted.ERRORmay
bereturnedifparametersareoutofrange,andwillbe
returnedifthecommandisnotrecognizedorisnotpermitted
inthecurrentstateorconditionofthemodem.
Terminology and acronyms
Thisdocumentmakesuseofacronymsthatareincommonuse
indatacommunicationsandcellulartechnology.OurInternet
siteprovidesaGlossaryofTermsandAcronyms(document
number2130891)thatmaybehelpfulinunderstandingsome
acronymsandterminologyusedinthisguide.
Current firmware versions
Versions
Note: Revision codes that
include letters, such as 2.1A, are
to be considered drafts and are
subject to change before final
release.
Document Thisdocumentisrevisedperiodicallyasnew
firmwareversionsarereleased.Thiseditionis:
Rev 2.4 Jan.08
Applicability of commands to different modules Each
commandlistedinthisguideincludesalistofsupporting
AC8xxandMC87xxmodules.Unlessotherwisenoted,the
followingminimumfirmwarerevisionsarerequiredto
supportthelistedcommands:
•AC850/AC860/MC8755/MC8765–RevisionU1_2_0or
higher
•AC875/MC8775/MC8775V–RevisionH1_0_0_0or
higher
•AC880/MC8780/MC8781–RevisionD1_0_3_0ap/
F1_0_0_0aporhigher
Todetermineyourfirmwarerevision:
•EntertheidentificationcommandAT+GMR
Themodemrespondswithversioninformationfor
software,firmware,andhardware.
ThedetailsfollowingtherevisionnumberincludeSierra
Wirelessinformationonthespecificbuildfollowedbythe
dateandtimeofthebuild.
+GMR: … F/W VER: R1_0_0_…

About this Guide
Rev 2.4 Jan.08 9
Upgrading
Ifyourmodemfirmwareisanearlierversion,youcanacquire
updatedfirmwarebycontactingyouraccountmanager.
Document structure
Thisdocumentassumesyouhavethe3GPPTS27.007AT
commanddocumentation(seepage7).Thisreferenceincludes
achaptercoveringSupported 27.007 AT commands,aswellas
theproprietarycommandslistedinthetablesbelow.Each
tablecorrespondstoonechapterinthisguide.
Note: The ‘Supporting modems’ column indicates which Mini Card
embedded module (MC) and AirCard modem (AC) models support
each command. If an entry is marked with an asterisk (‘*’), a firmware
upgrade may be required. See the detailed command entry for details.
Modem Status, Customization, and Reset Commands This
chapterdescribescommandsusedtodeterminemodemstatus,
adjustcustomizationsettings,andresetthemodem.
Table 1-1: Modem status and reset commands
Cmnd Pg Description Supporting
modems
!BAND 27 Selects a set of frequency bands / queries current
selection All
!BCINF 28 Returns the bootloader version All
!BOOTHOLD 28 Resets modem and waits in bootloader for firmware
download All
^CARDMODE 28 Returns SIM card mode (card type) All*
+CLVL 29 Sets / returns internal loudspeaker volume All*
+CMUT 29 Enables / disables uplink voice muting All
!CNTI 29 Returns current, available, and supported network
technologies All
+CQI 30 Returns or enables / disables return of averaged CQI
(Channel Quality Indicator) value (WCDMA only) All*
!CSDONSIO2 30 Configures secondary SIO port for circuit-switched data All*
+ECIO 31 Returns total Energy per chip per power density value
(WCDMA only) All*
!GETBAND 31 Returns the current active band All

Supported AT Command Reference
10 2130617
!GETRAT 31 Returns the current active radio access technology (RAT) All
!GRELIMEI 31 Returns the modem’s production IMEI All*
!GRESET 31 Resets the modem All
!GSMINFO 32 Displays 2G network information All
!GSTATUS 34 Returns operational status All
!GVER 35 Returns the firmware version All
^HVER 35 Returns the modem hardware version All*
!NVPORTSET 35 Assigns appropriate USB endpoint AT port AC880 / 881
MC8780 / 81
!PCTEMP 35 Returns current temperature information MC (all)
!PCVOLT 36 Returns current power supply voltage information MC (all)
!POWERDOWN 36 Powers down the system All
!REL 37 Queries the active protocol / revision All
!RESET 37 Resets the modem All
+RSCP 37 Returns Received Signal Code Power (RSCP) (WCDMA
only) All*
!SCACT 38 Activates / deactivates PDP context for FIFO interface All
!SCDFTPROF 38 Queries / sets the default profile ID All
!SCDNS 39 Queries / sets profile ID DNS address All
!SCPROF 40 Queries / sets SWI-specific profile information All
!SCPADDR 40 Displays IP address for specified PDP context All
!SELMODE 41 Queries / sets current service domain All
!SELRAT 41 Queries / sets current radio access technology (RAT) All
!SMSRETRY 42 Queries / sets SMS retry period and interval MC8780 / 81
AC880 / 881
!SMSSTSEN 43 Enables / disables SMS status reports MC8775 /
75V / 80 / 81
AC875/ 880/
881
!SWICALLPROG 44 Enables / disables Call Progress Notification All
^SYSCONFIG 46 Queries / sets system configuration information All*
Table 1-1: Modem status and reset commands (Continued)
Cmnd Pg Description Supporting
modems

About this Guide
Rev 2.4 Jan.08 11
Diagnostic Commands Thischapterdescribescommands
usedtoselectfrequencybandsanddiagnoseproblems.
Test commands Thischapterdescribescommandsrequired
toplacethemodeminparticularmodesofoperation,testhost
connectivity,andconfigurethetransmittersandreceiversfor
testmeasurements.
Memory Management Commands Thischapterdescribes
commandsthatcontrolthedatastoredinnon‐volatilememory
ofthemodem.
^SYSINFO 47 Returns service status information All*
!TIME 48 Queries / sets current time of day All
!UDINFO 49 Queries / sets current time of day All*
+UPSC 49 Displays Primary Scrambling Code (WCDMA only) All
+USET 50 Displays WCDMA set information All
&V 51 Return operating mode AT configuration parameters All
* A firmware upgrade may be required, as noted in the detailed listing for this command.
Table 1-1: Modem status and reset commands (Continued)
Cmnd Pg Description Supporting
modems
Table 1-2: Diagnostic commands
Cmnd Pg Description Supporting
modems
!AUTH 53 !AUTH = <randNumber> All*
!GCIPHER 54 Enables / disables ciphering and integrity settings All
!MXSTATS 55 Displays / clears 27.010 statistics All
* A firmware upgrade may be required, as noted in the detailed listing for this command.
Table 1-3: Test commands
Cmnd Pg Description Supporting
modems
!ERR 57 Displays diagnostic information All
!GCCLR 57 Clears crash dump data All
!GCDUMP 57 Displays the crash dump data All

Supported AT Command Reference
12 2130617
SIM Commands Thischapterdescribescommandsthat
communicatewithaninstalled(U)SIM.
Conventions
Thefollowingformatconventionsareusedinthisreference:
Charactercodesorkeystrokesthataredescribedwithwordsor
standardabbreviationsareshownwithinanglebracketsusing
adifferentfont,suchas<CR>forCarriageReturnand<space>
forablankspacecharacter.
Numericvaluesaredecimalunlessprefixedasnotedbelow.
Hexadecimalvaluesareshownwithaprefixof0x,i.e.inthe
form0x3D.
Binaryvaluesareshownwithaprefixof0b,i.e.intheform
0b00111101.
Commandandregistersyntaxisnotedusinganalternatefont:
!CHAN=<c>[,b].The“AT”charactersarenotshownbutmustbe
includedbeforeallcommandsexceptasnotedinthereference
tables.
Charactersthatarerequiredareshowninuppercase;param‐
etersarenotedinlowercase.Requiredparametersare
enclosedinanglebrackets(<n>)whileoptionalparametersare
enclosedwithinsquarebrackets([x]).Thebracketsarenotto
beincludedinthecommandstring.
Commandsarepresentedintableformat.Eachchaptercovers
thecommandsrelatedtothatsubjectandpresentsasummary
tabletohelpyoulocateaneededcommand.Commandsarein
ASCIIalphabeticalorderinthebodyofeachchapter.
Anydefaultsettingsarenotedinthecommandtables.Note
thatthesearethefactorydefaultsettingsandnotthedefault
parametervalueassumedifnoparameterisspecified.
Table 1-4: Memory management commands
Cmnd Pg Description Supporting
modems
!NVBACKUP 59 Backs up items stored in non-volatile memory All
Table 1-5: SIM commands
Cmnd Pg Description Supporting
modems
!ICCID 61 Returns (U)SIM card’s ICCID All

About this Guide
Rev 2.4 Jan.08 13
Result Code Thisisanumericortextcodethatisreturned
afterallcommands(exceptresets).Onlyoneresultcodeis
returnedforacommandlineregardlessofthenumberof
individualcommandscontainedontheline.
Response Thistermindicatesaresponsefromthemodem
thatisissuedpriortoaresultcode.Readingregistersor
issuingcommandsthatreportinformationwillprovidea
responsefollowedbyaresultcodeunlessthecommand
generatesanerror.
Responsesandresultcodesfromthemodem,orhostsystem
softwareprompts,areshowninthisfont:
CONNECT 14400

Supported AT Command Reference
14 2130617

2
Rev 2.4 Jan.08 15
2: Supported GSM / WCDMA AT
Commands
ThischapteridentifieswhichITU‐TRecommendationV.250,
3GPPTS27.005,and3GPPTS27.007ATcommandsare
supportedonregularandvoice‐enabledSierraWireless
AirCardmodems(850/860/875/880/881)andMiniCard
embeddedmodules(MC8755/65/75/80/81).Thesecommands
areusedto:
•Controlserialcommunicationsoveranasynchronous
interface(ITU‐TRecommendationV. 2 5 0 )
•ControlSMSfunctionsfordevicesonGSM/WCDMA
networks(3GPPTS27.005)
•ControldevicesoperatingonGSM/WCDMAnetworks
(3GPPTS27.007)
TheITU‐Tspecification,SerialAsynchronousDiallingand
Control(RecommendationV.250),isavailableontheInternational
TelecommunicationUnionwebsite,www.itu.int,andthe
3GPPspecificationdocuments,3GPPTS27.007V3.13.0(2003‐
03)and3GPPTS27.007V3.13.0(2003‐03),areavailableonthe
3GPPwebsite,www.3gpp.org.
Thetablesbelowidentifywhethereachcommandissupported
onAirCardmodemsandMiniCardembeddedmodules.An
“N/A”intheSupportedcolumnofthetableindicatesthatthe
commandisrelatedtoafeature(suchasvoice)thatisnot
availableonthemodems.
Somecommandsarepartiallysupported—thedescriptionsfor
thesecommandsidentifyanylimitationsoncommandusage.
Also,somecommandsaredescribedinmoredetailinlater
chapters—thedescriptionsforthesecommandslinktothose
detailedentries(forexample,&VinTable1).
Table 1: Supported ITU-T Recommendation V.250 AT commands
Command Description Supported
&C Set Data Carrier Detected (Received line signal detector) function
mode No
&D Set Data Terminal Ready function mode No
&F Set all current parameters to manufacturer’s defaults No
&S Set DSR signal No
&T Auto tests No

Supported AT Command Reference
16 2130617
&V Return operating mode AT configuration parameters Yes
&W Store current parameter to user-defined profile No
+DR V42bis data compression report Yes
+DS V42bis data compression No
+GCAP Request complete TA capabilities list Yes
+GMI Request manufacturer identification Yes
+GMM Request TA model identification Yes
+GMR Request TA revision identification Yes
+GOI Request global object identification No
+GSN Request TA serial number identification Yes
+ICF Set TE-TA control character framing Yes
+IFC Set TE-TA local data flow control Yes
+ILRR Set TE-TA local rate reporting mode No
+IPR Set fixed local rate Yes
AAnswer incoming call Yes
A/ Re-issues last AT command given No
DDial Yes
D><MEM><N> Originate call to phone number in memory <MEM> No
D><N> Originate call to phone number in current memory Yes
D><STR> Originate call to phone number in memory which corresponds to
alphanumeric field <STR> No
DL Redial last telephone number used No
ESet command echo mode Yes
HDisconnect existing connections Yes
IDisplay product identification information Yes
LSet monitor speaker loudness No
MSet monitor speaker mode No
OSwitch from command mode to data mode No
PSelect pulse dialing No
QSet Result code presentation mode No
Table 1: Supported ITU-T Recommendation V.250 AT commands (Continued)
Command Description Supported

Supported GSM / WCDMA AT Commands
Rev 2.4 Jan.08 17
S0 Set number of rings before automatically answering the call Yes
S10 Set disconnect delay after indicating the absence of data carrier Yes
S3 Set command line termination character Yes
S4 Set response formatting character Yes
S5 Set command line editing character Yes
S6 Set pause before blind dialing Yes
S7 Set number of seconds to wait for connection completion Yes
S8 Set number of seconds to wait when comma dial modifier used Yes
TSelect tone dialing Yes
VSet result code format mode Yes
XSet connect result code format and call monitoring Yes
ZSet all current parameters to user-defined profile Yes
Table 2: Supported 27.005 AT commands
Command Description Supported
+CMGC Send command Yes
+CMGD Delete message Yes
+CMGF Message format Yes
+CMGL List messages Yes
+CMGR Read message Yes
+CMGS Send message Yes
+CMGW Write message to memory Yes
+CMSS Send message from storage Yes
+CMNA New message acknowledgement to ME/TA Yes
+CNMI New message indications to TE Yes
+CPMS Preferred message storage Yes
+CRES Restore settings No
+CSAS Save settings No
+CSCA Service centre address Yes
+CSCB Select cell broadcast message types Yes
Table 1: Supported ITU-T Recommendation V.250 AT commands (Continued)
Command Description Supported

Supported AT Command Reference
18 2130617
+CSDH Show text mode parameters Yes
+CSMP Set text mode parameters Yes
+CSMS Select message service Yes
+CBM Cell broadcast message directly displayed Yes
+CMT Incoming message directly displayed Yes
+CDS SMS status report after sending a SMS Yes
+CBMI Cell broadcast message stored in memory at specified <index>
location No
+CMTI Incoming message stored in <mem> (“SM” - (U)SIM message
storage) at location <index> Yes
+CDSI Incoming SMS status report Yes
+CMS ERROR:
<err> SMS error (mobile or network error) Yes
Table 3: Supported 27.007 AT commands
Command Description Support
CITU T V.24 circuit 109 carrier detect signal behavior command
Format
•C<value>
Limitations
•Default <value> = 2
•<value> = 2 causes the AT/Data carrier detect pin to ‘wink’
(briefly switch off and on) when data calls end.
•<value> = 0 or 1 performs as defined in the standard
Partial
+CACM Accumulated call meter No
+CACSP Voice Group or Voice Broadcast Call State Attribute Presentation N/A
+CAEMLPP eMLPP Priority Registration and Interrogation No
+CAHLD Leave an ongoing Voice Group or Voice Broadcast Call N/A
+CAJOIN Accept an incoming Voice Group or Voice Broadcast Call N/A
+CALA Alarm N/A
+CALCC List current Voice Group and Voice Broadcast Calls N/A
+CALD Delete alarm N/A
+CALM Alert sound mode No
Table 2: Supported 27.005 AT commands (Continued)
Command Description Supported