ETSI EN 300 434-2 V1.2.1 (2001-08)

Digital Enhanced Cordless Telecommunications (DECT); Integrated Services Digital Network (ISDN); DECT/ISDN interworking for end system configuration; Part 2: Access profile

REN/DECT-A0196-2

Digitalne izboljšane brezvrvične telekomunikacije (DECT) – Digitalno omrežje z integriranimi storitvami (ISDN) – Vzajemno delovanje sistemov DECT/ISDN v konfiguraciji končnega sistema – 2. del: Profil dostopa

General Information

• Status: Published
• Publication Date: 13-Aug-2001
• Technical Committee: DECT A - DECT Non Testing Aspects
• Current Stage: 12 - Completion
• Due Date: 17-Aug-2001
• Completion Date: 14-Aug-2001
• Ref Project: SIST EN 300 434-2 V1.2.1:2003 - Digital Enhanced Cordless Telecommunications (DECT); Integrated Services Digital Network (ISDN); DECT/ISDN interworking for end system configuration; Part 2: Access profile

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Integrated Services Digital Network (ISDN); DECT/ISDN interworking for end system configuration; Part 2: Access profile33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:EN 300 434-2 Version 1.2.1SIST EN 300 434-2 V1.2.1:2003en01-december-2003SIST EN 300 434-2 V1.2.1:2003SLOVENSKI
STANDARD



SIST EN 300 434-2 V1.2.1:2003



ETSIEN300434-2V1.2.1(2001-08)EuropeanStandard(Telecommunicationsseries)DigitalEnhancedCordlessTelecommunications(DECT);IntegratedServicesDigitalNetwork(ISDN);DECT/ISDNinterworkingforendsystemconfiguration;Part2:AccessprofileSIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)2ReferenceREN/DECT-A0196-2KeywordsDECT,interworking,ISDN,radioETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°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:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)3ContentsIntellectualPropertyRights.6Foreword.61Scope.72References.73Definitionsandabbreviations.73.1Definitions.73.2DECTabbreviationsandacronyms.93.3ISDNabbreviationsandacronyms.104FeaturesfortheISDN-DECTaccessservice.114.1Descriptionofthefeatures.114.1.1Outgoingcall(feature0).114.1.2Speech(feature1).114.1.3Off-hook(feature4).114.1.4On-hook-fullrelease(feature5).114.1.5Dialleddigits-basic(feature7).114.1.6Dialleddigits-additional(feature8).114.1.7Diallingdelimiter(feature9).114.1.8Incomingcall(feature16).114.1.9Controlofsupervisorytones(feature26).114.1.10Signallingofdisplaycharacters(feature28).114.1.11Selectionofrequiredteleservice(feature52).114.1.12Selectionofbearerservice(feature53).124.1.13Voicebanddatacapability(feature60).124.1.14Keypadprotocolforsupplementaryservices(feature61).124.1.1564kbit/sunrestricteddigitalinformation(feature75).124.1.16Overlapsending-outgoingcall(feature77).124.1.17FunctionalsupplementaryserviceCallingLineIdentificationPresentation(CLIP)(feature101).124.1.18FunctionalsupplementaryserviceCallingLineIdentificationRestriction(CLIR)(feature102).124.1.19FunctionalsupplementaryserviceCOnnectedLineidentificationPresentation(COLP)(feature103).124.1.20FunctionalsupplementaryserviceCOnnectedLineidentificationRestriction(COLR)(feature104).124.1.21FunctionalsupplementaryserviceMultipleSubscriberNumber(MSN)(feature105).124.1.22FunctionalsupplementaryserviceDirectDiallingIn(DDI)(feature106).124.1.23FunctionalsupplementaryserviceSUBaddressing(SUB)(feature107).134.1.24FunctionalsupplementaryserviceCallWaiting(CW)(feature108).134.1.25FunctionalsupplementaryserviceHOLD(feature109).134.1.26FunctionalsupplementaryserviceClosedUserGroup(CUG)(feature110).134.1.27FunctionalsupplementaryserviceAdviceOfCharge(AOC)(feature111).134.1.28FunctionalsupplementaryserviceMaliciousCallIDentification(MCID)(feature112).134.1.29FunctionalsupplementaryserviceConferencecall,add-on(CONF)(feature113).134.1.30FunctionalsupplementaryserviceThreeparty(3PTY)(feature114).134.1.31FunctionalsupplementaryserviceCallDeflection(CD)(feature115).134.1.32FunctionalsupplementaryserviceUUSservice1(UUS1)(feature116).134.1.33FunctionalsupplementaryserviceUUSservice2(UUS2)(feature117).134.1.34FunctionalsupplementaryserviceUUSservice3(UUS3)(feature118).144.1.35FunctionalsupplementaryserviceExplicitCallTransfer(ECT)(feature119).144.1.36FunctionalsupplementaryserviceCompletionofCallstoBusySubscriber(CCBS)(feature120).144.1.37FunctionalsupplementaryserviceFreePhone(FPH)(feature121).144.1.38FunctionalsupplementaryserviceMeet-MeConference(MMC)(feature122).144.1.39Functionalsupplementaryservice"CallForwarding"(CF)(feature123).145RequirementsregardingtheNetwork(NWK)layer.145.1Summaryoffeaturesandrelatedprocedures.155.2Procedures.165.3Mappingofthefeaturesontotheprocedures.18SIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)45.3.1Outgoingcall(feature0).185.3.2Duplexspeech(feature1).185.3.3Off-hook(feature4).185.3.4On-hook-fullrelease(feature5).185.3.5Dialleddigits-basic(feature7).195.3.6Dialleddigits-additional(feature8).195.3.7Diallingdelimiter(feature9).195.3.8Incomingcall(feature16).195.3.9Controlofsupervisorytones(feature26).195.3.10Signallingofdisplaycharacters(feature28).195.3.11Selectionofrequiredteleservice(feature52).195.3.12Selectionofbearerservice(feature53).195.3.13Voicebanddatacapability(feature60).195.3.14Keypadprotocolforsupplementaryservices-CRSS(feature61a).205.3.1564kbit/sunrestricteddigitalinformation(feature75).205.3.16Overlapsending-outgoingcall(feature77).205.3.17FunctionalsupplementaryserviceCLIP(feature101).205.3.18FunctionalsupplementaryserviceCLIR(feature102).205.3.19FunctionalsupplementaryserviceCOLP(feature103).205.3.20FunctionalsupplementaryserviceCOLR(feature104).205.3.21FunctionalsupplementaryserviceMSN(feature105).205.3.22FunctionalsupplementaryserviceDDI(feature106).205.3.23FunctionalsupplementaryserviceSUB(feature107).205.3.24FunctionalsupplementaryserviceCW(feature108).215.3.25FunctionalsupplementaryserviceHOLD(feature109).215.3.26FunctionalsupplementaryserviceCUG(feature110).215.3.27FunctionalsupplementaryserviceAOC(feature111).215.3.28FunctionalsupplementaryserviceMCID(feature112).215.3.29FunctionalsupplementaryserviceCONF(feature113).215.3.30Functionalsupplementaryservice3PTY(feature114).215.3.31FunctionalsupplementaryserviceCD(feature115).215.3.32FunctionalsupplementaryserviceUUS1(feature116).215.3.33FunctionalsupplementaryserviceUUS2(feature117).215.3.34FunctionalsupplementaryserviceUUS3(feature118).225.3.35FunctionalsupplementaryserviceECT(feature119).225.3.36FunctionalsupplementaryserviceCCBS(feature120).225.3.37FunctionalsupplementaryserviceFPH(feature121).225.3.38FunctionalsupplementaryserviceMMC(feature122).225.3.39FunctionalsupplementaryserviceCF(feature123).226RequirementsregardingtheDLClayer.226.1Controlplane.226.1.1Minimumrequirements.226.1.2Incomingcall(feature16).226.2Userplane.237MAClayerrequirements.237.1MAClayerservices.237.1.1Connectionorientedservices.237.1.2Broadcastservices.237.2MAClayerprocedures.237.2.1Connectionorientedserviceprocedures.237.2.1.1General.237.3Requiredmessages.247.3.1Headerfield.247.3.2Messagesinthetailfield.247.3.2.1Identitiesinformation(NTtail).247.3.2.2Systeminformationandmultiframemarker(QTtail).247.3.2.3Paging(PTtail).257.3.2.4MACcontrol(MTtails).257.3.3MessagesintheB-field.257.4Monitoringofspeechquality.25SIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)58RequirementsregardingthePHLlayer.268.1General.269Requirementsregardingthespeechtransmission.269.1General.26AnnexA(informative):Bibliography.27History.28SIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)6IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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).FurtherdetailsoftheDECTsystemmaybefoundinETR043andTR101178.Thepresentdocumentispart2ofamulti-partdeliverablecoveringtheDigitalEnhancedCordlessTelecommunications(DECT);IntegratedServicesDigitalNetwork(ISDN)interworkingforendsystemconfiguration,asidentifiedbelow:Part1:"Interworkingspecification";Part2:"Accessprofile".NationaltranspositiondatesDateofadoptionofthisEN:10August2001DateoflatestannouncementofthisEN(doa):30November2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2002DateofwithdrawalofanyconflictingNationalStandard(dow):31May2002SIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)71ScopeThepresentdocumentspecifiesthesetoftechnicalrequirementsforDECTFixedParts(FPs)andPortableParts(PPs)necessaryforthesupportoftheISDN-DECTAccessService(IAS).ApparatusclaiminginteroperabilitybaseduponthisIAPhastofullycomplywiththeprocessmandatorytechnicalrequirements,andthoseforoptionalfeaturessofarastheyareprovidedforinthepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIEN300175-2:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part2:PhysicalLayer(PHL)".[2]ETSIEN300175-3:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part3:MediumAccessControl(MAC)layer".[3]ETSIEN300175-4:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part4:DataLinkControl(DLC)layer".[4]ETSIEN300175-5:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part5:Network(NWK)layer".[5]ETSIEN300175-8:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part8:Speechcodingandtransmission".[6]ITU-TRecommendationG.726(1990):"40,32,24,16kbit/sAdaptiveDifferentialPulseCodeModulation(ADPCM)".[7]ETSIEN300176:"DigitalEnhancedCordlessTelecommunications(DECT);Approvaltestspecification".[8]ETSIEN300434-1:"DigitalEnhancedCordlessTelecommunications(DECT);IntegratedServicesDigitalNetwork(ISDN);DECT/ISDNinterworkingforendsystemconfiguration;Part1:Interworkingspecification".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:bearerservice:typeoftelecommunicationservicethatprovidesadefinedcapabilityforthetransmissionofsignalsbetweenuser-networkinterfacesbroadcast:simplexpoint-to-multipointmodeoftransmissionSIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)8C-plane:controlplaneoftheDECTprotocolstacks,whichcontainsalloftheinternalDECTprotocolcontrol,butmayalsoincludesomeexternaluserinformationNOTE1:TheC-planestackalwayscontainsprotocolentitiesuptoandincludingtheNetwork(NWK)layer.call:alloftheNWKlayerprocessesinvolvedinoneNWKlayerpeer-to-peerassociationNOTE2:Callmaysometimesbeusedtorefertoprocessesofalllayers,sincelowerlayerprocessesareimplicitlyrequired.DECTFixedSystem(DFS):logicalgroupingthatcontainsallthefunctionsbetweentheDECTDreferencepointandthereferencepointonthefixedsideoftheDECTairinterfaceNOTE3:TheDECTFixedSystem(DFS)=FT+(localnetworkuptothefixedsideISDNreferencepoint(includingfixedsideIWU)).DECTNetwork(DNW):networkthatusestheDECTairinterfacetointerconnectalocalnetworktooneormoreportableapplications.ThelogicalboundariesoftheDECTnetworkaredefinedtobeatthetopoftheDECTNWKlayerNOTE4:ADNWisalogicalgroupingthatcontainsoneormorefixedradioterminationsplustheirassociatedPT.TheboundariesoftheDECTnetworkarenotphysicalboundaries.DECTPortableSystem(DPS):logicalgroupingthatcontainsallthefunctionsbetweentheDECTDreferencepointandtheuserinterfaceontheportablesideoftheDECTairinterfaceNOTE5:TheDPS=PT+(PortableApplication(PA)).EndSystem(ES):logicalgroupingthatcontainsapplicationprocessesandsupportstelecommunicationservicesNOTE6:FromtheOSIpointofview,endsystemsareconsideredassourcesandsinksofinformation.FixedPart(DECTFixedPart)(FP):physicalgroupingthatcontainsalloftheelementsintheDECTnetworkbetweenthelocalnetworkandtheDECTairinterfaceNOTE7:ADECTFPcontainsthelogicalelementsofatleastoneFT,plusadditionalimplementationspecificelements.FixedradioTermination(FT):logicalgroupoffunctionsthatcontainsalloftheDECTprocessesandproceduresonthefixedsideoftheDECTairinterfaceNOTE8:AFTonlyincludeselementsthataredefinedintheDECTCIstandard.Thisincludesradiotransmissionelementstogetherwithaselectionoflayer2andlayer3elements.GlobalNetwork(GNW):telecommunicationnetworkcapableofofferingalongdistancetelecommunicationserviceNOTE9:Thetermdoesnotincludelegalorregulatoryaspects,neitherdoesitindicateifthenetworkisapublicoraprivatenetwork.incomingcall:callreceivedataPPinter-operability:capabilityofFPsandPPs,thatenableaPPtoobtainaccesstoteleservicesinmorethanonelocationareaand/orfrommorethanoneoperator(morethanoneserviceprovider)InterworkingUnit(IWU):unitthatisusedtointerconnectsub-networksNOTE10:TheIWUcontainstheinterworkingfunctionsnecessarytosupporttherequiredsub-networkinterworking.ISDNAccessProfile(IAP):definedpartoftheDECT/ISDNinterworkingstandardthatensuresinter-operabilitybetweenFPsandPPsfortheaccessofISDNservicesLocalNetwork(LNW):telecommunicationnetworkcapableofofferinglocaltelecommunicationservicesNOTE11:Thetermdoesnotincludelegalorregulatoryaspects,nordoesitindicateifthenetworkisapublicnetworkoraprivatenetwork.SIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)9MACConnection(CONNECTION):associationbetweenonesourceMACMulti-BearerControl(MBC)entityandonedestinationMACMBCentity.ThisprovidesasetofrelatedMACservices(asetoflogicalchannels),anditcaninvolveoneormoreunderlyingMACbearersoutgoingcall:calloriginatingfromaPPpaging:processofbroadcastingamessagefromaDECTFPtooneormoreDECTPPsNOTE12:Differenttypesofpagingmessagearepossible.Forexample,the{LCE_REQUEST-PAGE}messageorderstherecipienttorespondwithacallset-upattempt.PortableApplication(PA):logicalgroupingthatcontainsalltheelementsthatliebeyondtheDECTnetworkboundaryontheportablesideNOTE13:Thefunctionscontainedintheportableapplicationmaybephysicallydistributed,butanysuchdistributionisinvisibletotheDECTnetwork.PortablePart(DECTPortablePart)(PP):physicalgroupingthatcontainsallelementsbetweentheuserandtheDECTairinterface.PPisagenerictermthatmaydescribeoneorseveralphysicalpiecesNOTE14:ADECTPPislogicallydividedintoonePTplusoneormorePAs.PortableradioTermination(PT):logicalgroupoffunctionsthatcontainsalloftheDECTprocessesandproceduresontheportablesideoftheDECTairinterfaceNOTE15:APTonlyincludeselementsthataredefinedintheDECTCIstandard.Thisincludesradiotransmissionelements(layer1)togetherwithaselectionoflayer2andlayer3elements.PublicAccessProfile(PAP):definedpartoftheDECTCommonInterface(DECTCI)standardthatensuresinter-operabilitybetweenFPsandPPsforpublicaccessservicesRadioFixedPart(RFP):onephysicalsub-groupofaFPthatcontainsalltheradioendpoints(oneormore)thatareconnectedtoasinglesystemofantennassegment:oneofthepiecesofdatathatisproducedbytheprocessofsegmentationNOTE16:Ingeneral,onesegmentonlyrepresentsaportionofacompletemessage.segmentation:processofpartitioningoneServiceDataUnit(SDU)fromahigherlayerintomorethanoneProtocolDataUnit(PDU).Thereverseprocessisassemblysupplementaryservice:servicethatmodifiesorsupplementsabasictelecommunicationserviceteleservice:typeoftelecommunicationservicethatprovidesthecompletecapability,includingterminalequipmentfunctions,forcommunicationbetweenusers,accordingtoprotocolsthatareestablishedbyagreementU-plane:userplaneoftheDECTprotocolstacks.Thisplanecontainsmostoftheend-to-end(external)userinformationandusercontrolNOTE17:TheU-planeprotocolsdonotincludeanyinternalDECTprotocolcontrol,anditmaybenullattheNWKlayerandattheDLClayersforsomeservices.3.2DECTabbreviationsandacronymsForthepurposesofthepresentdocumentthefollowingDECTabbreviationsandacronymsapply:3PTYThreepartyAOCAdviceOfChargeCCBSCompletionofCallstoBusySubscriberCCCallControlCCITT(The)InternationalTelegraphandTelephoneConsultativeCommitteeCDCallDeflectionSIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)10CFCallForwarding(supplementaryservice)HOLDCallHOLDCICommonInterfaceCLIPCallingLineIdentificationPresentationCLIRCallingLineIdentificationRestrictionCOLPCOnnectedLineidentificationPresentationCOLRCOnnectedLineidentificationRestrictionCONFConferencecall,add-onCRSSCallRelatedSupplementaryServicesCUGClosedUserGroupCWCallWaitingDDECTreferencepointforendsystemDDIDirectDiallingInDECTDigitalEnhancedCordlessTelecommunicationDFSDECTFixedSystemDLCDataLinkControlDPSDECTPortableSystemFPFixedPartFPHFreePhoneFTFixedradioTerminationIAPISDNAccessProfileIWUInterWorkingUnitLCELinkControlEntityMACMediumAccessControlMCIDMaliciousCallIDentificationMMCMeet-MeConferenceMSNMultipleSubscriberNumberNWKNetworkPAPPublicAccessProfilePDUProtocolDataUnitPPPortablePartPTPortableradioTerminationRFPRadioFixedPartSUBSUBaddressingSDUServiceDataUnitUUSUser-to-UserSignallingUUS1UUSservice1UUS2UUSservice2UUS3UUSservice33.3ISDNabbreviationsandacronymsForthepurposeofthepresentdocument,thefollowingISDNabbreviationsandacronymsapply:CCreferencepointISDNIntegratedServicesDigitalNetworkPPreferencepointRRreferencepointSSreferencepointS/TS/TreferencepointTTreferencepointSIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)114FeaturesfortheISDN-DECTaccessservice4.1Descriptionofthefeatures4.1.1Outgoingcall(feature0)AcalloriginatedattheDECTPP.4.1.2Speech(feature1)Circuit-mode32kbit/sunrestricted8kHzstructuredbearerservicecategorysuitableforspeechinformationtransfer(seeITU-TRecommendationG.726[6]).4.1.3Off-hook(feature4)Theabilitytoindicatetheactionofgoingoff-hook,e.g.tostartcallset-uporacceptacall.4.1.4On-hook-fullrelease(feature5)Theabilitytoindicatetheactionofgoingon-hook(e.g.toterminateacall)andfullyreleasetheradioresource.4.1.5Dialleddigits-basic(feature7)Thecapabilitytodialdigits0-9,*,#.4.1.6Dialleddigits-additional(feature8)ThecapabilitytodialdigitsA,B,C,D(inadditiontothebasicdigits).4.1.7Diallingdelimiter(feature9)Ameanstogenerateorotherwisetoindicate"end-of-destination-address"whendiallingortransmittingdialleddigits.4.1.8Incomingcall(feature16)AcallreceivedataDECTPP.4.1.9Controlofsupervisorytones(feature26)FortheISDN-DECTaccessservice,networksupervisorysignalsshallbemadeavailablein-bandtothePPbytheFP,eitherbyrelayfromtheglobalorextendedservicesnetwork,orbylocalgenerationatthePP.TheprovisionofatonegeneratorisoptionalforISDN-DECTaccessservicePPs.4.1.10Signallingofdisplaycharacters(feature28)ThetransmissiontothePPofcharacterstobedisplayedontheuser'sPPdisplay(ifprovided).4.1.11Selectionofrequiredteleservice(feature52)Theabilitytoselectaparticularteleservicewhichisrequiredatagivenmoment.SIST EN 300 434-2 V1.2.1:2003



ETSIETSIEN300434-2V1.2.1(2001-08)124.1.12Selectionofbearerservice(feature
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