ETSI EN 300 466 V1.2.1 (2001-01)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); DECT/GSM Interworking Profile (IWP); General description of service requirements; Functional capabilities and information flows33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:EN 300 466 Version 1.2.1SIST EN 300 466 V1.2.1:2003en01-december-2003SIST EN 300 466 V1.2.1:2003SLOVENSKI
STANDARD



SIST EN 300 466 V1.2.1:2003



ETSIEN300466V1.2.1(2001-01)EuropeanStandard(Telecommunicationsseries)DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);Generaldescriptionofservicerequirements;FunctionalcapabilitiesandinformationflowsSIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)2ReferenceREN/DECT-A0172KeywordsDECT,GSM,interworking,profile,radio,stage2ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.103.1Definitions.103.2Abbreviations.114Conformance.125Introduction.126General.137GSMserviceprovision.137.1General.137.1.1ProcessingofGSMservicesnotsupported.137.1.2Bearerservice.137.1.2.1Exceptionhandling.137.1.3Teleservice.137.1.3.1Exceptionhandling.137.1.4Tones.137.1.5Supplementaryservices.137.1.5.1Generalrequirements.147.1.5.2Exceptionhandling.147.1.5.3NumberIdentificationSupplementaryServices(NISS).147.1.5.4CallOfferingSupplementaryServices(COSS).147.1.5.5CallCompletionSupplementaryServices(CCSS).147.1.5.6MultiPartySupplementaryServices(MPSS).147.1.5.7CommunityofInterestSupplementaryServices(CISS).147.1.5.8ChargingSupplementaryServices(CSS).147.1.5.9CallRestrictionSupplementaryServices(CRSS).147.1.6UnstructuredSupplementaryServicesData(USSD).147.1.6.1Exceptionhandling.157.2Functionalcapabilitiesandinformationflows.157.2.1Supplementaryservices.157.2.1.1Generalrequirement.157.2.1.2NumberIdentificationSupplementaryServices(NISS).157.2.1.3CallOfferingSupplementaryServices(COSS).157.2.1.4CallCompletionSupplementaryServices(CCSS).157.2.1.5MultiPartySupplementaryServices(MPSS).157.2.1.6CommunityofInterestSupplementaryServices(CISS).157.2.1.7CallRestrictionSupplementaryServices(CRSS).157.2.1.8ChargingSupplementaryServices(CSS).157.2.2UnstructuredSupplementaryServicesData(USSD).157.2.3Bearerservices.167.2.4Teleservices.168PortablePart(PP)requirements.168.1General.168.2Description.168.2.1BasicPPfeatures.168.2.2SupplementaryPPfeatures.168.2.3AdditionalPPfeatures.168.3RequirementsforimplementingPPfeatures.168.3.1BasicPPfeatures.17SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)48.3.1.1Displayofcallednumber.178.3.1.2Indicationofcallprogresssignals.178.3.1.3Country/PLMNindicationandPLMNselection.178.3.1.4Keypad.178.3.1.5InternationalMobilestationEquipmentIdentity(IMEI)and/orInternationalPortableEquipmentIdentity(IPEI).188.3.1.6Internationalaccessfunction.188.3.1.7Autocallingrestrictioncapabilities.188.3.1.8Emergencycallscapabilities.188.3.1.9Subscriptionidentitymanagement.188.3.1.10SupportofDECTencryption.188.3.1.11SupportofERMESalphabet.188.3.2Supplementary/additionalPPfeatures.188.3.2.1Supportofsupplementaryservices.188.3.2.2Abbreviateddialling.198.3.2.3Fixednumberdialling.198.3.2.4LastNumbersDialled(LND).198.4Man-MachineInterface(MMI)ofthePP.198.4.1Physicaluserinputfeatures.198.4.1.1MMIrelatedtoPPfeatures.198.4.2Physicaloutputfeatures.198.4.3SupportofDualToneMultiFrequency(DTMF).208.4.4Procedures.208.4.4.1Definitionoffunctions.208.4.4.2CallControl.208.5SIMinterfaces.208.5.1EntryofPINandPIN2.208.5.2ChangeofPINorPIN2.208.5.3UnblockingofPINorPIN2.218.5.4Statusinformation-returncodes.218.6Serviceaccess.219FixedPart(FP)requirements.219.1SupportofGSMMobileEquipmentIdentityandSoftwareVersionnumber(IMEISV).219.2SupportofMSclassmark.219.3Supportofemergencycallcapability.219.4Supportofinternationalaccessfunction.219.5SupportofDTMF.229.6SupportofERMESalphabet.22AnnexA(informative):GSMteleservicesandsupplementaryservices.23History.24SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSIProjectDigitalEnhancedCordlessTelecommunications(DECT).NationaltranspositiondatesDateofadoptionofthisEN:12January2001DateoflatestannouncementofthisEN(doa):30April2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31October2001DateofwithdrawalofanyconflictingNationalStandard(dow):31October2001SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)61ScopeThepresentdocumentisapartoftheDigitalEuropeanCordlessTelecommunications/GlobalSystemforMobileCommunications(DECT/GSM)interworkingprofileandspecifiesrequirementsneededtoensurethatGSMbasicservicescanbeprovidedovertheDECTairinterface.ToenableDECTterminalstointer-workwithDECTsystemswhichareconnectedtotheGSMinfrastructure,thepresentdocumentspecifiestheadditionstotheGAPspecification,EN300444[12]onwhichthisprofileisbased.TheadditionsarebasedontheDECTCommonInterfacespecificationgiveninEN300175-1[2]toEN300175-8[9].FromtheGSMsidethepresentdocumentassumesinterworkingwithGSMPublicLandMobileNetwork(PLMN)phase2.InterworkingwithGSMPhase1isoutsidethescopeofthepresentdocument.InterworkingrequirementsarebaseduponMobileSwitchingCentre(MSC)attachmentfortheDECTFixedPart(FP)astheFPisusingtheA-interfacetowardstheGSMMSCintherespectthattheFPemulatesaGSMBaseStationController(BSC)withregardstotheGSMmessageswhicharerelevanttothepresentdocument.ThecompleteinterfaceusedbetweentheDECTFPandtheGSMMSCisspecifiedinETS300499[13].AttachmentviaotherinterfacestoGSM-networksisoutsidethescopeofthepresentdocument.TheDECTaccessprotocolsandFPandPortablePart(PP)interworking/mappingsnecessaryforthesupportofbasicvoicetelephonyservicearespecifiedinEN300370[11].Theinterworking/mappingsandaccessrequirementsforthesupportofotherservicesofthepresentdocument,willbeincludedinfuturestandardsoftheDECT/GSMinterworkingprofile.ThewholesetofGSMservicesaccordingtoGSMPhase2issupportedunlessitisexplicitlystatedinthefollowingclausesofthepresentdocument.TheDECTPPhastoaccepttheGSMSubscriberIdentificationModule(SIM)aswellastheDECTAuthenticationModule(DAM),withaGSMapplication.ThefunctionalseparationoftheDECT/GSMinterworkingamongDECTFPandPPallowsforterminalportability.AllroamingscenariosbasedonSIMroamingasdescribedinGSMspecificationsareapplicable.AdditionallysubscribersusingaSIMorDAMwithGSMapplicationinconjunctionwithaDECTPP,capableofDECTGSMinterworkingmayalsoroamamongFPsconnectedtodifferentGSMnetworks.HandoveramongDECTradioaccesssystemsandGSMradioaccesssystemsaswellashandoveramongDECTcellsconnectedtodifferentCommonControlFixedParts(CCFPs),whichareindividuallylinkedtoaMSC,isoutsidethescopeofthepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]ETSIETS300133-2:"ElectromagneticcompatibilityandRadiospectrumMatters(ERM);EnhancedRadioMEssageSystem(ERMES);Part2:Serviceaspects".[2]ETSIEN300175-1:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part1:Overview".[3]ETSIEN300175-2:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part2:PhysicalLayer(PHL)".SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)7[4]ETSIEN300175-3:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part3:MediumAccessControl(MAC)Layer".[5]ETSIEN300175-4:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part4:DataLinkControl(DLC)Layer".[6]ETSIEN300175-5:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part5:Network(NWK)Layer".[7]ETSIEN300175-6:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part6:IdentitiesandAddressing".[8]ETSIEN300175-7:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part7:SecurityFeatures".[9]ETSIEN300175-8:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part8:SpeechCodingandTransmission".[10]ETSIEN300176:"DigitalEnhancedCordlessTelecommunications(DECT);Approvaltestspecification".[11]ETSIEN300370:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);Accessandmapping(protocol/proceduredescriptionfor3,1kHzspeechservice)".[12]ETSIEN300444:"DigitalEnhancedCordlessTelecommunications(DECT);GenericAccessProfile(GAP)".[13]ETSIETS300499:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);MobileservicesSwitchingCentre(MSC)-FixedPart(FP)interconnection".[14]ETSIETS300501:"Europeandigitalcellulartelecommunicationssystem(Phase2);BearerServices(BS)supportedbyaGSMPublicLandMobileNetwork(PLMN)(GSM02.02)".[15]ETSIETS300502:"Europeandigitalcellulartelecommunicationssystem(Phase2);TeleservicessupportedbyaGSMPublicLandMobileNetwork(PLMN)(GSM02.03)".[16]ETSIETS300503:"Digitalcellulartelecommunicationssystem(Phase2);Generalonsupplementaryservices(GSM02.04)".[17]ETSIETS300505:"Digitalcellulartelecommunicationssystem(Phase2);MobileStation(MS)features(GSM02.07version4.8.2)".[18]ETSIETS300507:"Digitalcellulartelecommunicationssystem(Phase2);Serviceaccessibility(GSM02.11)".[19]ETSIETS300508:"Digitalcellulartelecommunicationssystem(Phase2);InternationalMobilestationEquipmentIdentities(IMEI)(GSM02.16version4.7.0)".[20]ETSIETS300509:"Europeandigitalcellulartelecommunicationssystem(Phase2);SubscriberIdentityModule(SIM);Functionalcharacteristics(GSM02.17)".[21]ETSIETS300510:"Digitalcellulartelecommunicationssystem(Phase2);DescriptionofChargeAdviceInformation(CAI)(GSM02.24)".[22]ETSIETS300511:"Europeandigitalcellulartelecommunicationssystem(Phase2);Man-MachineInterface(MMI)oftheMobileStation(MS)(GSM02.30)".[23]ETSIETS300512:"Digitalcellulartelecommunicationssystem(Phase2);Proceduresforcallprogressindications(GSM02.40)".[24]ETSIETS300514:"Digitalcellulartelecommunicationssystem(Phase2);Lineidentificationsupplementaryservices;Stage1(GSM02.81version4.6.1)".SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)8[25]ETSIETS300515:"Digitalcellulartelecommunicationssystem(Phase2);CallForwarding(CF)supplementaryservices;Stage1(GSM02.82)".[26]ETSIETS300516:"Digitalcellulartelecommunicationssystem(Phase2);CallWaiting(CW)andCallHold(HOLD)supplementaryservices;Stage1(GSM02.83)".[27]ETSIETS300517:"Digitalcellulartelecommunicationssystem(Phase2);MultiParty(MPTY)supplementaryservices;Stage1(GSM02.84)".[28]ETSIETS300518:"Digitalcellulartelecommunicationssystem(Phase2);ClosedUserGroup(CUG)supplementaryservices;Stage1(GSM02.85)".[29]ETSIETS300519:"Digitalcellulartelecommunicationssystem(Phase2);AdviceofCharge(AoC)supplementaryservices;Stage1(GSM02.86)".[30]ETSIETS300520:"Digitalcellulartelecommunicationssystem(Phase2);CallBarring(CB)supplementaryservices;Stage1(GSM02.88)".[31]ETSIETS300521:"Europeandigitalcellulartelecommunicationssystem(Phase2);Networkfunctions(GSM03.01)".[32]ETSIETS300527:"Digitalcellulartelecommunicationssystem(Phase2);Handoverprocedures(GSM03.09)".[33]ETSIETS300529:"Digitalcellulartelecommunicationssystem(Phase2);Technicalrealizationofsupplementaryservices(GSM03.11)".[34]ETSIETS300530:"Europeandigitalcellulartelecommunicationssystem(Phase2);Locationregistrationprocedures(GSM03.12)".[35]ETSIETS300532:"Europeandigitalcellulartelecommunicationssystem(Phase2);SupportofDualToneMulti-Frequencysignalling(DTMF)viatheGSMsystem(GSM03.14)".[36]ETSIETS300542:"Digitalcellulartelecommunicationssystem(Phase2);Lineidentificationsupplementaryservices;Stage2(GSM03.81version4.8.1)".[37]ETSIETS300543:"Digitalcellulartelecommunicationssystem(Phase2);CallForwarding(CF)supplementaryservices;Stage2(GSM03.82)".[38]ETSIETS300544:"Europeandigitalcellulartelecommunicationssystem(Phase2);CallWaiting(CW)andCallHold(HOLD)supplementaryservices;Stage2(GSM03.83)".[39]ETSIETS300545:"Europeandigitalcellulartelecommunicationssystem(Phase2);MultiParty(MPTY)supplementaryservices;Stage2(GSM03.84)".[40]ETSIETS300546:"Digitalcellulartelecommunicationssystem(Phase2);ClosedUserGroup(CUG)supplementaryservices;Stage2(GSM03.85)".[41]ETSIETS300547"Europeandigitalcellulartelecommunicationssystem(Phase2);AdviceofCharge(AoC)supplementaryservices-Stage2(GSM03.86)".[42]ETSIETS300548:"Europeandigitalcellulartelecommunicationssystem(Phase2);CallBarring(CB)supplementaryservices;Stage2(GSM03.88)".[43]ETSIETS300549:"Digitalcellulartelecommunicationssystem(Phase2);UnstructuredSupplementaryServiceData(USSD);Stage2(GSM03.90)".[44]ETSIETS300557:"Digitalcellulartelecommunicationssystem(Phase2);Mobileradiointerface;Layer3specification(GSM04.08version4.23.1)".[45]ETSIETS300558:"Digitalcellulartelecommunicationssystem(Phase2);Mobileradiointerfacelayer3;Supplementaryservicesspecification;Generalaspects(GSM04.10)".[46]ETSIETS300564:"Digitalcellulartelecommunicationssystem(Phase2);Mobileradiointerfacelayer3;Supplementaryservicesspecification;Formatsandcoding(GSM04.80)".SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)9[47]ETSIETS300578:"Digitalcellulartelecommunicationssystem(Phase2);Radiosubsystemlinkcontrol(GSM05.08version4.22.0)".[48]ETSIEN300607:"Digitalcellulartelecommunicationssystem(Phase2+);MobileStation(MS)conformancespecification(GSM11.10version7.1.1Release1998)".[49]ETSIETS300608:"Digitalcellulartelecommunicationssystem(Phase2);SpecificationoftheSubscriberIdentityModule-MobileEquipment(SIM-ME)interface(GSM11.11version4.21.1)".[50]ETSIETS300625:"Digitalcellulartelecommunicationssystem(Phase2);UnstructuredSupplementaryServiceData(USSD);Stage1(GSM02.90version4.1.1)".[51]ETSIETS300702:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP)".[52]ETSIEN300703:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);GSMPhase2supplementaryservicesimplementation".[53]ETSIETS300704-1:"RadioEquipmentandSystems(RES);DigitalEnhancedCordlessTelecommunications/GlobalSystemforMobilecommunications(DECT/GSM)InterworkingProfile(IWP);ProfileImplementationConformanceStatement(ICS);Part1:PortableradioTermination(PT)".[54]ETSIETS300704-2:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);ProfileImplementationConformanceStatement(ICS)".[55]ETSIETS300756:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);Implementationofbearerservices".[56]ETSIETS300764:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);Implementationofshortmessageservice,point-to-pointandcellbroadcast".[57]ETSIETS300792:"DigitalEnhancedCordlessTelecommunications(DECT);GlobalSystemforMobilecommunications(GSM);DECT/GSMInterworkingProfile(IWP);Implementationoffacsimilegroup3".[58]ETSIETR015:"DigitalEnhancedCordlessTelecommunications(DECT);Referencedocument".[59]ETSIETR043:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Servicesandfacilitiesrequirementsspecification".[60]ETSIETR056:"DigitalEnhancedCordlessTelecommunications(DECT);Systemdescriptiondocument".[61]ETSITBR10:"DigitalEnhancedCordlessTelecommunications(DECT);GeneralTerminalAttachmentRequirements;TelephonyApplications".[62]ETSITBR6:"DigitalEnhancedCordlessTelecommunications(DECT);Generalterminalattachmentrequirements".[63]ISOPublication8859-7:"Informationprocessing-8-bitsingle-bytecodedgraphiccharactersets-Part7:Latin/Greekalphabet".SIST EN 300 466 V1.2.1:2003



ETSIETSIEN300466V1.2.1(2001-01)103Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:attach:processwherebyaPPwithinthecoverageareaofaFPtowhichithasaccessrights,notifiesthisFPthatitisoperative.Thereverseprocessisdetach,whichreportsthePPasinoperativeNOTE1:AnoperativePPisassumedtobereadytoreceivecalls.authentication:processwherebyaDECTsubscriberispositivelyverifiedtobealegitimateuserofaparticularFPNOTE2:Authenticationisgenerallyperformedatcallset-up,butmayalsobedoneatanyothertime(e.g.duringacall).bearerservice:typeoftelecommunicationservicethatprovidesadefinedcapabilityforthetransmissionofsignalsbetweenuser-networkinterfacesNOTE3:TheDECTuser-networkinterfacecorrespondstothetopoftheNetwork(NWK)layer(layer3).call:alloftheNWKlayerprocessesinvolvedinoneNWKlayerpeer-to-peerassociationNOTE4:Callmaysometimesbeusedtorefertoprocessesofalllayers,sincelowerlayerprocessesareimplicitlyrequired.FixedPart(DECTFixedPart)(FP):physicalgroupingthatcontainsalloftheelementsintheDECTnetworkbetweenthelocalnetworkandtheDECTairinterfaceNOTE5:ADECTFPcontainsthelogicalelementsofatleastoneFixedradioTermination(FT),plusadditionalimplementationspecificelements.FixedpartGSMPLMNattachment(DECTFPattachedtoAGSMMSC):definitionofafunctionalenvironmentwhereaDECTsystem(FP)isattachedtoanGSMMSC.TheMSCinthiscasereferstoafunctionalentityprovidingtherequiredMobilityManagement(MM)andCallControl(CC)functionalitydefinedinthepresentdocumentinordertocommunicatewiththeFPFixedradioTermination(FT):logicalgroupoffunctionsthatcontainsalloftheDECTprocessesandproceduresonthefixedsideoftheDECTairinterfaceNOTE6:AFTonlyincludeselementsthataredefinedintheDECTCIstandard.Thisincludesradiotransmissionelementstogetherwithaselectionoflayer2andlayer3elements.handover:processofswitchingacallinprogressfromonephysicalchanneltoanotherphysicalchannel.Theseprocessescanbeinternal(seeinternalhandover)orexternal(seeexternalhandover)NOTE7:Therearetwophysicalformsofhandover,intra-cellhandoverandinter-cellhandover.Intra-cellhandoverisalwaysinternal.Inter-cellhandovercanbeinternalorexternal.incomingcall:callreceivedataPPinter-cellhandover:switchingofacallinprogressfromonecelltoanothercellinternalhandover:handoverprocessesthatarecompletelyinternaltooneFixedradioTermination(
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