SIST EN 300 979 V7.0.1:2003

Digital cellular telecommunications system (Phase 2+) (GSM); In-band control of remote transcoders and rate adaptors for half rate traffic channels (GSM 08.61 version 7.0.1 Release 1998)

Upgrade from Phase 2+ to Release 1998

Digitalni celični telekomunikacijski sistem (faza 2+) – Znotrajpasovno krmiljenje oddaljenih prekodirnikov in prilagodilnikov hitrosti pri prometnih kanalih s polovično hitrostjo govora (GSM 08.61, različica 7.0.1, izdaja 1998)

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 979 V7.0.1 (2000-01) - Digital cellular telecommunications system (Phase 2+) (GSM); In-band control of remote transcoders and rate adaptors for half rate traffic channels (GSM 08.61 version 7.0.1 Release 1998)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); In-band control of remote transcoders and rate adaptors for half rate traffic channels (GSM 08.61 version 7.0.1 Release 1998)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 979 Version 7.0.1SIST EN 300 979 V7.0.1:2003en01-december-2003SIST EN 300 979 V7.0.1:2003SLOVENSKI
STANDARD



SIST EN 300 979 V7.0.1:2003



ETSIEN300979V7.0.1(2000-01)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);In-bandcontrolofremotetranscodersandrateadaptorsforhalfratetrafficchannels(GSM08.61version7.0.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)2(GSM08.61version7.0.1Release1998)ReferenceREN/SMG-020861Q7KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]Ideliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)3(GSM08.61version7.0.1Release1998)ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74Generalapproach.75Framestructure.95.116kbit/ssubmultiplexing.95.1.1Speechframe.95.1.2Dataframe.105.1.3O&Mframe.115.1.4Coding.115.1.4.1Codingofspeechframes.115.1.4.2Codingofdataframes.135.1.4.3CodingofO&Mframes.135.28kbit/ssubmultiplexing.145.2.1Speechframe.145.2.2Dataframe.145.2.3O&Mframe.155.2.4Coding.155.2.4.1Uplinkcoding.155.2.4.2Downlinkcoding.175.3OrderofBitTransmission.186Procedures.186.1RemoteControlofTranscodersandRateAdaptors.186.2ResourceAllocation.186.3ResourceRelease.196.4InCallModification.196.5Handlingofmissingdata.196.6ProceduresforSpeechFrames.206.6.1TimeAlignmentofSpeechFrames.206.6.1.116kbit/ssubmultiplexing.206.6.1.1.1DownlinkTimeAlignment.206.6.1.1.1.1InitialTimeAlignmentstate.206.6.1.1.1.2StaticTimeAlignmentstate.216.6.1.1.2UplinkTimeAlignment.236.6.1.1.3InitiationatResourceAllocation.236.6.1.1.4TimeAlignmentduringHandover.236.6.1.28kbit/ssubmultiplexing.236.6.1.2.1DownlinkTimeAlignment.236.6.1.2.2UplinkTimeAlignment.256.6.1.2.3InitiationatResourceallocation.266.6.1.2.4TimeAlignmentduringhandover.266.6.2ProceduresforDiscontinuousTransmission(DTX).266.6.2.1DTXproceduresintheuplinkdirection.266.6.2.2DTXproceduresinthedownlinkdirection.266.7ProceduresforDataFrames.276.7.1TheRAAFunction.276.7.2TheRA1/RA1'Function.286.7.3TheRA2Function.28SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)4(GSM08.61version7.0.1Release1998)6.7.4Proceduresfor8kbit/sintermediaterateadaptionrate.286.7.5SupportofNon-TransparentBearerApplications.286.8FrameSynchronization.296.8.116kbit/ssubmultiplexing.296.8.1.1SearchforFrameSynchronization.296.8.1.2FrameSynchronizationAfterPerformingDownlinkTimingAdjustments.296.8.1.3FrameSynchronizationMonitoringandRecovery.296.8.28kbit/ssubmultiplexing.306.8.2.1SearchforFrameSynchronization.306.8.2.2FrameSynchronizationMonitoringandRecovery.306.9Correction/detectionofbiterrors.306.9.116kbit/ssubmultiplexing.306.9.1.1ErrorDetectionontheControlBits.306.9.1.1.1GeneralProcedure.306.9.1.1.2SpeechFrames.306.9.1.2Handlingofframesreceivedwitherrors.306.9.28kbit/ssubmultiplexing.316.9.2.1ErrorDetectionontheControlBits.316.9.2.2Handlingofframesreceivedwitherrors.316.10ProceduresforOperation&Maintenance.316.10.1TransferofO&MInformationBetweentheTRAUandtheBSC.316.10.2ProceduresintheTRAU.326.10.3ProceduresintheBSC.326.10.3.1UseofO&MFrames.326.10.4ProceduresintheBTS.32AnnexA(informative):ChangeRequestHistory.33History.34SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)5(GSM08.61version7.0.1Release1998)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbytheSpecialMobileGroup(SMG).ThepresentdocumentdefinestheprotocolbetweentheBaseTransceiverStation(BTS)andtheremoteTranscoder/RateAdaptionUnit(TRAU)forhalfratespeechandhalfratedata,withinthedigitalcellulartelecommunicationssystem.ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7indicatesRelease1998ofGSMPhase2+.xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:31December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)6(GSM08.61version7.0.1Release1998)1ScopeThepresentdocumentdescribestheprotocolbetweentheBaseTransceiverStation(BTS)andtheremoteTranscoder/RateAdaptionUnit(TRAU)forspeechanddataonhalfratetrafficchannel(TCH/H).Theprotocolisspecifiedfor8kbit/sand16kbit/ssubmultiplexingscheme.ThepresentdocumentshouldbeconsideredtogetherwiththeGSM06series,GSM04.21(RateAdaptionontheMS-BSSInterface)andGSM08.20(RateAdaptionontheBTS/MSCInterface).2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.•Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.•Foraspecificreference,subsequentrevisionsdonotapply.•Foranon-specificreference,thelatestversionapplies.•Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.•ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).[1]GSM01.02:"Digitalcellulartelecommunicationsystem(Phase2+);GeneraldescriptionofaGSMPublicLandMobileNetwork(PLMN)".[2]GSM01.04:"Digitalcellulartelecommunicationsystem(Phase2+);Abbreviationsandacronyms".[3]GSM04.21:"Digitalcellulartelecommunicationssystem(Phase2+);RateadaptionontheMobileStation-BaseStationSystem(MS-BSS)interface".[4]GSM05.03:"Digitalcellulartelecommunicationssystem(Phase2+);Channelcoding".[5]GSM06.21:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Substitutionandmutingoflostframesforhalfratespeechtrafficchannels".[6]GSM06.22:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;Comfortnoiseaspectsforhalfratespeechtrafficchannels".[7]GSM06.41:"Digitalcellulartelecommunicationssystem(Phase2+);Halfratespeech;DiscontinuousTransmission(DTX)forhalfratespeechtrafficchannels".[8]GSM06.42:"Digitalcellulartelecommunicationssystem(Phase2+);"Halfratespeech;VoiceActivityDetector(VAD)forhalfratespeechtrafficchannels".[9]GSM08.08:"Digitalcellulartelecommunicationsystem(Phase2+);MobileSwitchingCentre-BaseStationSystem(MSC-BSS)interfaceLayer3specification".[10]GSM08.20:"Digitalcellulartelecommunicationsystem(Phase2+);RateadaptionontheBaseStationSystem-Mobile-servicesSwitchingCentre(BSS-MSC)interface".[11]GSM08.52:"Digitalcellulartelecommunicationsystem(Phase2+);BaseStationController-BaseTransceiverStation(BSC-BTS)interfaceInterfaceprinciples".[12]GSM08.54:"Digitalcellulartelecommunicationsystem(Phase2+);BaseStationController-BaseTransceiverStation(BSC-BTS)interfaceLayer1structureofphysicalcircuits".SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)7(GSM08.61version7.0.1Release1998)[13]GSM08.58:"Digitalcellulartelecommunicationsystem(Phase2+);BaseStationController-BaseTransceiverStation(BSC-BTS)interfaceLayer3specification".[14]GSM12.21:"Digitalcellulartelecommunicationsystem(Phase2);NetworkManagement(NM)proceduresandmessagesontheA-bisinterface".[15]ITU-TRecommendationI.460:"Multiplexing,rateadaptionandsupportofexistinginterfaces".[16]ITU-TRecommendationV.110:"Supportofdataterminalequipments(DTEs)withV-Seriesinterfacesbyanintegratedservicesdigitalnetwork".3Definitionsandabbreviations3.1DefinitionsNospecificdefinitionsapplytothepresentdocument.3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:BSCBaseStationControllerBTSBaseTransceiverStationCCUChannelCodecUnitRARateAdaptionTRAUTranscoderandRateAdaptionUnitOtherabbreviationsusedinthepresentdocumentarelistedinGSM01.04.4GeneralapproachTheTRAUshallbecontrolledbytheBTSwhenitispositionedremotefromtheBTS.Inthiscase,thespeech/datainformationandTRAUcontrolsignalsexchangedbetweentheChannelCodecUnit(CCU)intheBTSandtheTRAUshallbetransferredinframesdenoted"TRAUframes".TheTRAUframesmaybecarriedbyeither16kbit/strafficchannelsor8kbit/schannels.Thechoiceofthetrafficchannelbitrateorsubmultiplexingschemeisoperatordependent.TheTRAUframeshaveafixedlengthof:-160bits(20ms)when8kbit/ssubmultiplexingisused;-320bits(20ms)when16kbit/ssubmultiplexingisused.TheprotocolbetweentheBTSandtheTRAUshouldbethesameiftheTRAUispositionedeitherattheMSCsiteorattheBSCsite.Inthefirstcase,theBSCshouldbeconsideredastransparentfor16kbit/sand8kbit/schannels.TheTRAUisconsideredapartoftheBSCwhentheTRAUisremotefromtheBTS(seeGSM08.52),andthesignallingbetweentheBSCandtheTRAU(e.g.detectionofcallrelease,handoverandtransferofO&Minformation)maybeperformedbyusingBSCinternalsignals.However,thesignallingbetweentheCCUandtheTRAU,usingTRAUframesasspecifiedinthepresentdocument,ismandatorywhentheTRAUisremotefromtheBTS.Fordatatransfer,aconversionfunctionisrequired,inadditiontotheconversion/rateadaptionspecifiedinGSM08.20,toadaptITU-TV.110framestotheTRAUdataframes.ThisfunctionconstitutestheRAA.NOTE:Ifstandard64kbit/sswitchingisusedintheBSC,multiplexingaccordingtoITU-TRecommendationI.460shouldapplyatbothsidesoftheswitch.SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)8(GSM08.61version7.0.1Release1998)ApossibleconfigurationoftheTRAUandtheCCUisshowninfigure4.1.ThefunctionsinsidetheTRAUare:-"RemoteTranscoderandRateAdaptorControlFunction"(RTRACF);-"RemoteSpeechHandlerFunction"(RSHF);-theRAAfunction;-theRA2function;-thetranscoderfunction.ThefunctionsinsidetheCCUare:-"TranscoderandRateAdaptorControlFunction"(TRACF);-"SpeechHandlerFunction"(SHF);-theRAAfunction;-theRA1/RA1'function;-thechannelcodecfunction.ThepresentdocumentdoesnotdescribetheproceduresinsidetheTRAUandtheCCU.Thelayoutinfigure4.1isonlyintendedasareferencemodel.TranscoderandRAControlFunctionRemoteTranscoderandRAControlFunctionRAARA2RA1RA1'ChannelCodecFunctionDataControlSpeech/DataRemoteSpeechHandlerFunctionRadioframesSpeech64kbit/s8kbit/s16kbit/s320bit/20ms160bit/20msSpeechHandlerFunctionTranscoderFunction(note)L3controlsignalsRAADataSpeechNOTE:ThistechnicalspecificationassumestheDTXhandlerfunctiontobepartoftheTranscoderFunction.FigureGSM08.61/4.1:FunctionalentitiesforhandlingofcontrolofremotetranscodersandrateadaptorsSIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)9(GSM08.61version7.0.1Release1998)5Framestructure5.116kbit/ssubmultiplexing5.1.1SpeechframeBitnumberOctetno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



ETSIETSIEN300979V7.0.1(2000-01)10(GSM08.61version7.0.1Release1998)5.1.2DataframeBitnumberOctetno.123456781000000002000000031C1C2C3C4C5C6C74C8C9C10C11C12C13C14C1551D1D2D3D4D5D6D761D8D9D10D11D12D13D1471D15D16D17D18D19D20D2181D22D23D24D25D26D27D28Dataframe91D29D30D31D32D33D34D35position1101D36D37D38D39D40D41D42111D43D44D45D46D47D48D49121D50D51D52D53D54D55D56131D57D58D59D60D61D62D63141111111115111111111611111111171111111118111111111911111111201111111121111111112211111111231D'1D'2D'3D'4D'5D'6D'7241D'8D'9D'10D'11D'12D'13D'14251D'15D'16D'17D'18D'19D'20D'21261D'22D'23D'24D'25D'26D'27D'28Dataframe271D'29D'30D'31D'32D'33D'34D'35position3281D'36D'37D'38D'39D'40D'41D'42291D'43D'44D'45D'46D'47D'48D'49301D'50D'51D'52D'53D'54D'55D'56311D'57D'58D'59D'60D'61D'62D'63321111111133111111113411111111351111111136111111113711111111381111111139111111114011111111SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)11(GSM08.61version7.0.1Release1998)5.1.3O&MframeBitnumberOctetno.1234567810000000020000000031C1C2C3C4C5C6C74C8C9C10C11C12C13C14C1551D1D2D3D4D5D6D76D8D9D10D11D12D13D14D1571D16D17D18D19D20D21D228D23D24D25D26D27D28D29D3091D31D32D33D34D35D36D3710D38D39D40D41D42D43D44D45111D46D47D48D49D50D51D5212D53D54D55D56D57D58D59D60131D61D62D63D64D65D66D6714D68D69D70D71D72D73D74D75151D76D77D78D79D80D81D8216D83D84D85D86D87D88D89D90171D91D92D93D94D95D96D9718D98D99D100D101D102D103D104D105191D106D107D108D109D110D111D11220D113D114D115D116D117D118D119D120211D121D122D123D124D125D126D12722D128D129D130D131D132D133D134D135231D136D137D138D139D140D141D14224D143D144D145D146D147D148D149D150251D151D152D153D154D155D156D15726D158D159D160D161D162D163D164D165271D166D167D168D169D170D171D17228D173D174D175D176D177D178D179D180291D181D182D183D184D185D186D18730D188D189D190D191D192D193D194D195311D196D197D198D199D200D201D20232D203D204D205D206D207D208D209D210331D211D212D213D214D215D216D21734D218D219D220D221D222D223D224D225351D226D227D228D229D230D231D23236D233D234D235D236D237D238D239D240371D241D242D243D244D245D246D24738D248D249D250D251D252D253D254D255391D256D257D258D259D260D261D26240D263D264S1S2S3S4S5S65.1.4CodingInthefollowingsections,thecodingoftheframesisdescribed.Anyspareornotusedcontrolbitsshouldbecodedbinary"1".5.1.4.1CodingofspeechframesControlbits(C-bits):SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)12(GSM08.61version7.0.1Release1998)DescriptionUplinkDownlinkFrametype(BitsC1-C4)C1C2C3C40001C1C2C3C41110ChanneltypeBitC51:halfrate1:halfrateTimeAlignment(BitsC6-C11)Binarynumberindicatingtherequiredtimingadjustmenttobeinstepsof250/500µs.Binarynumberindicatingthetimingadjustmentmade.ThefollowingvaluesapplyforthecodingC6C7.C11000000Nochangeinframetiming000001Delayframe1*500µs000010Delayframe2*500µs.100111Delayframe39*500µs101000Notused.111101Notused111110Delayframe1*250µs111111Advanceframe250µsUplinkBadFrameIndicator(BFI)C12(seeGSM06.41)DownlinkUplinkFrameError(UFE)C12(seesection6.8.1.3)0:BFI=01:BFI=10:UFE=0:baduplinkframing1:UFE=1:gooduplinkframingSilenceDescriptor(SID)C13-C14(seeGSM06.41)C13C14:SIDSID1SID000:SID=001:SID=110:SID=2TimeAlignmentFlag(TAF)C15(seeGSM06.41)0:TAF=01:TAF=1SpareSpeechindicator(SP)C16(seeGSM06.41)Spare0:SP=01:SP=1DTXdownlinkindicator(DTXd)C170:DownlinkDTXshallnotbeapplied1:DownlinkDTXshallbeappliedSpareBitsC18-C21SpareSpareUFIbit:UnreliableFrameIndication(seeGSM06.41).Thisbitissettobinary"1"inthedownlinkdirection.DataBits(D-bits)BitsD1.D112:Speechblocktransferredinthesameorderasoutputfromthetranscoder(seeGSM06.20).CyclicRedundancyCheckbits(CRC-bits)BitsCRC0.CRC2:CRCofthebitsD1toD44.Thebitsarecodedaccordingtoacycliccodeusingthegeneratorpolynomial:g(X)=X3+X+1Theencodingofthecycliccodeisperformedinasystematicform,whichmeansthat,inGF(2),thepolynomial:D1*X46+D2*X45+.+D44*X3+CRC2*X2+CRC1*X+CRC0.whereCRC0,CRC1,CRC2aretheparitybits,whendividedbyg(X)yieldsaremainderequalto:1+X+X2.SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)13(GSM08.61version7.0.1Release1998)TimeAlignmentBitsBitsT1.T4:BitspositionedattheendofthedownlinkanduplinkTRAUspeechframes.Downlink:Ifthetimingoftheframeistobeadvanced250µs,these4bitsarenottransferredinordertoreducetheframelengthaccordingly.Whentransferred,thebitsaresettobinary"1".Uplink:T1andT2aresettobinary"1".Ifthetimingoftheframeistobeadvanced125µs,thebitsT3andT4arenottransferredinordertoreducetheframelengthaccordingly.Whentransferred,thebitsaresettobinary"1"(seesection6.6.1.1.2).5.1.4.2CodingofdataframesAnyspareornotusedcontrolbitsshouldbecodedbinary"1".Controlbits(C-bits):DescriptionUplinkDownlinkFrametypeBitsC1-C4C1C2C3C40100:DataC1C2C3C41011:DataChanneltypeBitC51:halfrate1:halfrateIntermediateRAbitrateBitC60:8kbit/s0:8kbit/sBitsC7-C11SpareSpareBitC12UplinkFrameError(UFE)C12(seesection6.8.1.3)Spare0:UFE=0:baduplinkframing1:UFE=1:gooduplinkframingBitsC13-C15SpareSpareIdledataframeAnidledataframeisadataframewithalldatabitpositionssettobinary"1"(i.e.allbitsofthemodifiedV.110framesaresetto"1").5.1.4.3CodingofO&MframesControlbits(C-bits):DescriptionUplinkDownlinkFrametypeBitsC1-C4C1C2C3C40010:O&MC1C2C3C41101:O&MChanneltypeBitC51:halfrate1:halfrateBitsC6-C11SpareSpareBitC12UplinkFrameError(UFE)C12(seesection6.8.1.3)Spare0:UFE=0:baduplinkframing1:UFE=1:gooduplinkframingBitsC13-C15SpareSpareDataBits(D-bits)BitsD1.D264:BitsusedfortransferofO&Minformation.ThecodinganduseofthesebitsarelefttothemanufactureroftheBSC/TRAU.SpareBits(S-bits)BitsS1.S6:Spare.SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)14(GSM08.61version7.0.1Release1998)5.28kbit/ssubmultiplexing5.2.1SpeechframeBitnumberOctetno1234567810000000021C1C2C3C4C5XC1XC2301XC3XC4XC5XC6D1D241D3D4D5D6D7D8D951D10D11D12D13D14D15D1661D17D18D19D20D21D22D2371D24D25D26D27D28D29D3081D31D32D33D34D35D36D3791D38D39D40D41D42D43D44101CRC2CRC1CRC0D45D46D47D48111D49D50D51D52D53D54D55121D56D57D58D59D60D61D62131D63D64D65D66D67D68D69141D70D71D72D73D74D75D76151D77D78D79D80D81D82D83161D84D85D86D87D88D89D90171D91D92D93D94D95D96D97181D98D99D100D101D102D103D104191D105D106D107D108D109D110D111201D112C6C7C8C9T1T25.2.2DataframeBitnumberOctetno.1234567810000000021C1C2C3C4C5D1D2301D3D4D5D6D7D841D9D10D11D12D13D14D1551D16D17D18D19D20D21D22Dataframe61D23D24D25D26D27D28D29position171D30D31D32D33D34D35D3681D37D38D39D40D41D42D4391D44D45D46D47D48D49D50101D51D52D53D54D55D56D57111D58D59D60D61D62D63D'1121D'2D'3D'4D'5D'6D'7D'8131D'9D'10D'11D'12D'13D'14D'15141D'16D'17D'18D'19D'20D'21D'22151D'23D'24D'25D'26D'27D'28D'29Dataframe161D'30D'31D'32D'33D'34D'35D'36position2171D'37D'38D'39D'40D'41D'42D'43181D'44D'45D'46D'47D'48D'49D'50191D'51D'52D'53D'54D'55D'56D'57201D'58D'59D'60D'61D'62D'631SIST EN 300 979 V7.0.1:2003



ETSIETSIEN300979V7.0.1(2000-01)15(GSM08.61version7.0.1Release1998)5.2.3O&MframeBitnumberOctetno.1234567810000000021C1C2C3C4C5XC1XC2301XC3XC4XC5XC6D1D241D3D4D5D6D7D8D951D10D11D12D13D14D15D1661D17D18D19D20D21D22D2371D24D25D26D27D28D29D3081D31D32D33D34D35D36D3791D38D39D40D41D42D43D44101D45D46D47D48D49D50D51111D52D53D54D55D56D57D58121D59D60D61D62D63D64D65131D66D67D68D69D70D71D72141D73D74D75D76D77D78D79151D80D81D82D83D84D85D86161D87D88D89D90D91D92D93171D94D95D96D97D98D99D100181D101D102D103D104D105D106D107191D108D109D110D111D112D113D114201D115D116D117D118D119D12015.2.4CodingInthefollowingsections,thecodingoftheframesisdescribed.Anyspareornotusedtransmittedcontrolbitsshouldbecodedbinary"1".5.2.4.1UplinkcodingControlb
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