SIST EN 300 765-2 V1.2.1:2003

• Abstract:

  Updated to align with RAP part 1 and the DPRS standards. Supporting ETSI member organisations; Ericsson, Alcatel, Siemens, Philips.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT)
• 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 300 765-2 V1.2.1 (2001-02) - Digital Enhanced Cordless Telecommunications (DECT); Radio in the Local Loop (RLL) Access Profile (RAP); Part 2: Advanced telephony services

SIST EN 300 765-2 V1.2.1:2003 is the Slovene adoption of ETSI EN 300 765-2 Version 1.2.1 for Digital Enhanced Cordless Telecommunications (DECT) Radio in the Local Loop (RLL) Access Profile (RAP), Part 2: Advanced telephony services. It specifies the technical requirements for DECT Fixed Part (FP) and DECT Cordless Terminal Adapter (CTA) equipment that support advanced telephony services, data services, digital leased lines, and Operation, Administration and Maintenance (OA&M) in public RLL use.

What does SIST EN 300 765-2 V1.2.1:2003 specify?

SIST EN 300 765-2 V1.2.1:2003 specifies the DECT technical requirements needed for RAP in advanced telephony applications. Its scope is to support air-interface interoperability between RAP CTAs, RAP FPs, and Wireless Relay Stations (WRSs) when used.

The document is organized into clauses on scope, references, definitions, service description, feature definitions, interoperability requirements, and NWK layer procedures. It is supported by annexes for OA&M codings, CTA data-port realizations, WRS interworking, and synchronization requirements.

Annex	What it covers
Annex A	Void
Annex B	Codings for “OA&M” messages
Annex C	CTA data port realizations
Annex D	Interworking with WRSs
Annex E	Synchronization requirements for fixed parts
Annex F	Bibliography

What are the key requirements of SIST EN 300 765-2 V1.2.1:2003?

Clause 4 states that RAP part 2 covers ISDN services, non-voiceband data services, and digital leased lines, and that if these services are provided they shall follow the defined procedures. In practice, an implementer chooses which services the CTA or FP offers, then implements the matching interworking rules.

Clause 4.2.1 ties ISDN support to the Intermediate ISDN access Profile (IIP). The profile provides transparent access to ISDN services over DECT, so the equipment must interwork through the DECT and ISDN reference configurations used by the IIP.

Clause 4.2.2 defines advanced data services such as LAN service, Internet access over IP transport, Internet over Point-to-Point Protocol (PPP), and Wireless V.24. It also states that Mobility Class 2 applies to all DECT data profiles in this RAP application, which means roaming and call-control behavior are part of the data service design.

Clause 5 and Clause 6 make OA&M behavior a core part of interoperability. Features include incoming and outgoing maintenance transactions, maintenance during call, physical resources fault reporting, remote test, alarms, on-air modification of user parameters, remote configuration, claim actions, remote resynchronization, and advanced file transfer. Some of these are mandatory and some optional, but any implemented optional feature must follow the specified procedures.

Clause 6.4.2 requires fixed radio endpoints with blind slots to announce them periodically, and the CTA shall use that information when selecting a channel. This matters because channel setup should avoid slots that the FP marks as unavailable.

Clause 6.4.4 defines advance timing support. The FT can request timing correction from the PT so that transmissions line up with the frame timing on the air interface, which helps maintain reliable bearer operation.

Clause 7 defines how OA&M information is carried, mainly through the <> information element in CC-INFO or MM messages, or through maintenance calls when needed. Annex B gives the codings, so implementers have a common message format for remote maintenance, test, alarm, and configuration functions.

Clause 7.2.4 and Clause 7.2.6 cover on-air user-parameter changes, additional subscriptions, AC derivation from UAK, and claim actions. These procedures control live subscription changes and can temporarily block new procedures while allowing ongoing ones to continue.

Annex D adds specific requirements for WRS use, including transparency between FT and PT, cipher-key transfer for encrypted relayed connections, and relay and handover procedures. Annex E adds synchronization requirements for public fixed parts, including GPS synchronization or synchronization ports.

What terms does SIST EN 300 765-2 V1.2.1:2003 define?

• Cordless Terminal Adapter (CTA) - The physical grouping that contains a DECT portable termination and a line interface.
• Fixed Part (DECT Fixed Part) (FP) - The DECT network side that sits between the local network and the DECT air interface.
• Fixed radio Termination (FT) - The set of DECT processes and procedures on the fixed side of the air interface.
• Wireless Relay Station (WRS) - A unit that combines PT and FT elements to relay information between DECT terminations.
• Intermediate ISDN access Profile (IIP) - The DECT/ISDN interworking profile used when a DECT system bridges an ISDN terminal and an ISDN network.
• Operation, Administration and Maintenance (OA&M) - The control information used for remote monitoring, testing, configuration, and fault reporting.

Who uses SIST EN 300 765-2 V1.2.1:2003?

This standard is used by DECT equipment manufacturers, especially designers of CTAs, FPs, and WRSs. It is also used by telecom operators, service providers, and system integrators that offer public RLL access with ISDN or data services.

Quality managers and test laboratories use it to check interoperability, OA&M behavior, and support for the specified services and procedures. Buyers and network planners use it to judge whether an implementation can support advanced telephony, data access, maintenance, and relay operation in a DECT RLL environment.

What changed in SIST EN 300 765-2 V1.2.1:2003 from the previous edition?

This edition replaces ETS 300 765-2 Version 1.1.2. The scope states that it was updated to align with RAP part 1 and the DPRS standards.

Which standards are used with SIST EN 300 765-2 V1.2.1:2003?

• EN 300 175-1 to EN 300 175-8 - The DECT Common Interface baseline for the air interface, layers, identities, security, and speech coding.
• EN 300 444 - The Generic Access Profile used for mobility and security aspects.
• ETS 300 822 - The DECT/ISDN interworking profile used for ISDN service support.
• EN 301 649 - The DECT Packet Radio Service profile used for the data-service procedures.
• EN 300 700 - The Wireless Relay Station reference for WRS-specific behavior.
• EN 301 406 - The harmonized DECT radio standard for essential radio requirements.
• ISO/IEC 9646-6 and ISO/IEC 9646-7 - The conformance testing framework and ICS methodology.
• ITU-T Recommendation I.411 - The ISDN reference configurations used in the ISDN service description.
• EN 300 765-1 - Part 1 of RAP, covering basic telephony services.
• EN 300 297 - The ISDN access digital section referenced for NT1-type digital access.
• ISO 8802 (all parts) - The LAN standards referenced for Ethernet and Token Ring services.

What does the SIST EN 300 765-2 V1.2.1:2003 document contain?

The document contains a service overview, a reference model figure, feature definitions, interoperability tables, and NWK procedure descriptions. It also includes message coding tables for OA&M, detailed bit-field codings in Annex B, and procedure mappings between features and NWK/MAC behavior.

For engineering and testing, the most practical parts are the maintenance call procedures, remote test and configuration sequences, claim action handling, advanced timing, and WRS interworking procedures. Annex C explains CTA data-port realization options, and Annex E gives the synchronization conditions that matter for public fixed parts.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YHDigital Enhanced Cordless Telecommunications (DECT); Radio in the Local Loop (RLL) Access Profile (RAP); Part 2: Advanced telephony services33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:EN 300 765-2 Version 1.2.1SIST EN 300 765-2 V1.2.1:2003en01-december-2003SIST EN 300 765-2 V1.2.1:2003SLOVENSKI
STANDARD
ETSIEN300765-2V1.2.1(2001-02)EuropeanStandard(Telecommunicationsseries)DigitalEnhancedCordlessTelecommunications(DECT);RadiointheLocalLoop(RLL)AccessProfile(RAP);Part2:AdvancedtelephonyservicesSIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)2ReferenceREN/DECT-A0173-2KeywordsDECT,GSM,RLL,FWA,WLLETSI650RoutedesLuciolesF-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 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitions,symbolsandabbreviations.73.1Definitions.73.2Symbols.103.3Abbreviations.104Descriptionofservices.114.1Referencemodel.114.2Services&facilities.124.2.1ISDNservices.124.2.2Non-voicebanddataservices.134.2.2.1LANservice.134.2.2.2Internetaccess.134.2.2.2.1IPtransportservice.134.2.2.2.2InternetoverPoint-to-PointProtocol(PPP)service.134.2.2.3WirelessV.24.145Featuredefinitions.145.1Network(NWK)features.145.1.1DECTCTAOA&Mfeatures.145.1.2ISDNCTAspecificOA&Mfeatures.156Interoperabilityrequirements.156.1General.156.2NWKfeatures.156.2.1General.156.2.2OA&Mfeatures.156.3DLCservices.166.4MACservices.166.4.1General.166.4.2Blindslotinformation.166.4.3Improvedchannelselectionrules.166.4.4Advancetiming.166.5PhysicalLayer(PHL)services.176.6NWKfeaturetoproceduremapping.187NWKlayerprocedures.197.1Maintenancecalls.197.1.1Maintenancecallswithinthedataprofiles.197.1.1.1Incomingmaintenancecall.197.1.1.2Outgoingmaintenancecall.207.1.1.3Outgoingcallduringmaintenancecall.207.1.1.4Incomingcallduringmaintenancecall.207.1.2MaintenancecallswithintheIIP.207.1.2.1Incomingmaintenancecall.207.1.2.2Outgoingmaintenancecall.207.2SendingOA&Minformation.207.2.1Physicalresourcesfault.217.2.2Remotetest.217.2.3Alarms.217.2.4On-airmodificationofuserparameters.227.2.4.1Modificationofexistingusersparameters.227.2.4.2Additionalsubscriptionstothesamefixedpart.23SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)47.2.4.3DerivationofACforadditionalsubscriptions.237.2.5Remoteconfiguration.247.2.6Claimactions.247.2.6.1ClaimActionsFTsideInitiated.257.2.6.2ClaimActionsCTAInitiated.267.2.7Remoteresynchronization.277.2.8Advancedfiletransfer.277.3WRSmaintenancecalls.287.3.1IncomingWRSmaintenancecall.287.3.2OutgoingWRSmaintenancecall.287.3.3MaintenanceduringWRSMMoperation.28AnnexA(informative):Void.29AnnexB(normative):Codingsfor"OA&M"messages.30B.1GeneralStructureforRAP<>IE.30B.2RAP-OA&MIWU-TO-IWUContentsProprietary.31B.3RAP-OA&MIWU-TO-IWUContentsStandardized.32AnnexC(informative):CTAdataportrealizations.34AnnexD(normative):InterworkingwithWRSs.35D.1Definitionsoffeatures,servicesandprocedures.35D.1.1NWKfeatures.35D.1.2MACservices.35D.2Interoperabilityrequirements.36D.2.1NWKfeatures.36D.2.2DLCservices.37D.2.3MACservices.37D.2.4PHLservices.38D.2.5NWKfeaturetoproceduremapping.39D.2.6MACservicetoproceduremapping.40D.3NWKlayerprocedures.41D.3.1NWKlayertransparencybetweenFTandPT.41D.3.2CipherkeytransfertoCRFP.41D.4MAClayerprocedures.41D.4.1ExtendedFixedPartcapabilities.41D.4.2Hopcontrol.41D.4.3NormalC/Obearerset-up.41D.4.4DualC/Obearerset-up.41D.4.5CRFPconnectionsuspendandresume.41D.4.6CRFPC/Orelease.41D.4.7Bearerhandoverrequest.42D.4.8Connectionhandoverrequest.42AnnexE(normative):Synchronizationrequirementsforfixedparts.43AnnexF(informative):Bibliography.44History.45SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)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).EveryENpreparedbyETSIisavoluntarystandard.Thepresentdocumentmaycontaintextconcerningconformancetestingoftheequipmenttowhichitrelates.Thistextshouldbeconsideredasguidanceonlyanddoesnotmakethepresentdocumentmandatory.ThepresentdocumentisbasedonEN300175parts1[1]to8[8],EN300444[12],ETS300822[16],andEN301649[18].ThepresentdocumenthasbeendevelopedinaccordancetotherulesofdocumentingaprofilespecificationasdescribedinISO/IEC9646-6[10].Thepresentdocumentispart2ofatwo-partdeliverablecoveringtheDigitalEnhancedCordlessTelecommunications(DECT);RadiointheLocalLoop(RLL)AccessProfile(RAP),asidentifiedbelow:Part1:"Basictelephonyservices";Part2:"Advancedtelephonyservices".NationaltranspositiondatesDateofadoptionofthisEN:9February2001DateoflatestannouncementofthisEN(doa):31May2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30November2001DateofwithdrawalofanyconflictingNationalStandard(dow):30November2001SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)61ScopeThepresentdocumentspecifiesthatsetoftechnicalrequirementsforDigitalEnhancedCordlessTelecommunications(DECT)FixedPart(FP)andDECTCordlessTerminalAdapter(CTA)forthesupportoftheRadiointheLocalLoop(RLL)AccessProfile(RAP).TheobjectiveofthepresentdocumentistoensuretheairinterfaceinteroperabilityofDECTRAPCTAsandDECTRAPFPsandWirelessRelayStations(WRSs)ifapplied.EN300765-1[15]containstheso-called"PlainOldTelephoneService(POTS)"servicesincludinganalogueleasedlinesand64kbit/sbearerservice.EN300765-1[15]alsoprovidesforoptionalmobilityfeaturesbysupportingGenericAccessProfile(GAP)PortablePart(PP)subscriberterminalsandCTAswithWRSGAPfunctionality.ThepresentdocumentcontainstelecommunicationservicesasofferedbyIntegratedServicesDigitalNetwork(ISDN),contemporarynon-voicebanddataservicesprovidedthrough,forexample,adedicateddataportattheCTA,andsupportofdigitalleasedlines.Theprovisionofthementionedservicesisnotmandatedbythepresentdocument,butifprovidedtheyshallbeprovidedasdefined(provisionoptional,processmandatory).Anobjectiveistouseasmuchaspossiblefromexistingprofiles:DECT/ISDNIntermediateISDNaccessProfile(IIP)asdefinedinETS300822[16]andthePacketRadioServiceasdefinedinEN301649[18].Therefore,mostoftheRAPfeaturesrefertofeaturesdefinedinotherprofilesandthenecessaryadditionalfeatures(e.g.Operation,AdministrationandMaintenance(OA&M))arelistedandexplainedinthepresentdocument.Inaddition,thepresentdocumentdefinesadditionalfeatures,services,procedures,etc.fortheCTAandtheFT,whichareprovisionmandatoryeitherintheCTAorintheFT,aswellassomeelementsthatareprovisionoptionalbutstillprocessmandatory.ThesefeaturesinparticulardefinetheoperationandmaintenanceofCTAsinrelationtotheprovidedservice(profile)inapublicnetwork.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIEN300175-1:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part1:Overview".[2]ETSIEN300175-2:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part2:Physicallayer(PHL)".[3]ETSIEN300175-3:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part3:MediumAccessControl(MAC)layer".[4]ETSIEN300175-4:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part4:DataLinkControl(DLC)layer".[5]ETSIEN300175-5:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part5:Network(NWK)layer".[6]ETSIEN300175-6:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part6:Identitiesandaddressing".[7]ETSIEN300175-7:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part7:Securityfeatures".SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)7[8]ETSIEN300175-8:"DigitalEnhancedCordlessTelecommunications(DECT);CommonInterface(CI);Part8:Speechcodingandtransmission".[9]ETSIEN301406:"DigitalEnhancedCordlessTelecommunications(DECT);HarmonizedENforDigitalEnhancedCordlessTelecommunications(DECT)coveringessentialrequirementsunderarticle3.2oftheR&TTEDirective;Genericradio".[10]ISO/IEC9646-6:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part6:Protocolprofiletestspecification".[11]ISO/IEC9646-7:"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part7:ImplementationConformanceStatements".[12]ETSIEN300444:"DigitalEnhancedCordlessTelecommunications(DECT);GenericAccessProfile(GAP)".[13]ETSIETR056:"DigitalEnhancedCordlessTelecommunications(DECT);Systemdescriptiondocument".[14]ETSIETS300700:"DigitalEnhancedCordlessTelecommunications(DECT);WirelessRelayStation(WRS)".[15]ETSIEN300765-1:"DigitalEnhancedCordlessTelecommunications(DECT);RadiointheLocalLoop(RLL)AccessProfile(RAP);Part1:Basictelephonyservices".[16]ETSIETS300822:"DigitalEnhancedCordlessTelecommunications(DECT);IntegratedServicesDigitalNetwork(ISDN);DECT/ISDNinterworkingforintermediatesystemconfiguration;Interworkingandprofilespecification".[17]ITU-TRecommendationI.411(1993):"ISDNuser-networkinterfaces-Referenceconfigurations".[18]ETSIEN301649:"DigitalEnhancedCordlessTelecommunications(DECT);DECTPacketRadioService(DPRS)".[19]ETSIETR185:"DigitalEnhancedCordlessTelecommunications(DECT);DataServicesProfile(DSP);Profileoverview".[20]ETSIETS300297:"IntegratedServicesDigitalNetwork(ISDN);AccessdigitalsectionforISDNbasicaccess".[21]ISO8802(allparts):"Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-Localandmetropolitanareanetworks-Specificrequirements".3Definitions,symbolsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:authentication:processwherebyaDECTsubscriberispositivelyverifiedtobealegitimateuserofaparticularFPNOTE1:Authenticationisgenerallyperformedatcallset-up,butmayalsobedoneatanyothertime(e.g.duringacall).bearerservice:typeoftelecommunicationservicethatprovidesadefinedcapabilityforthetransmissionofsignalsbetweenuser-networkinterfacesNOTE2:TheDECTuser-networkinterfacecorrespondstothetopofthenetworklayer(layer3).C-plane:controlplaneoftheDECTprotocolstacks,whichcontainsalloftheinternalDECTprotocolcontrol,butmayalsoincludesomeexternaluserinformationNOTE3:TheC-planestackalwayscontainsprotocolentitiesuptoandincludingthenetworklayer.SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)8call:AlloftheNetwork(NWK)layerprocessesinvolvedinonenetworklayerpeer-to-peerassociationNOTE4:Callmaysometimesbeusedtorefertoprocessesofalllayers,sincelowerlayerprocessesareimplicitlyrequired.CordlessTerminalAdapter(CTA):physicalgroupingthatcontainsaDECTportableterminationandalineinterfaceFixedPart(DECTFixedPart)(FP):physicalgroupingthatcontainsalloftheelementsintheDECTnetworkbetweenthelocalnetworkandtheDECTairinterfaceNOTE5:ADECTFPcontainsthelogicalelementsofatleastoneFT,plusadditionalimplementationspecificelements.DECTnetwork:networkthatusestheDECTairinterfacetointerconnectalocalnetworktooneormoreportableapplications.ThelogicalboundariesoftheDECTnetworkaredefinedtobeatthetopoftheDECTnetworklayer.NOTE6:ADECTNetworkisalogicalgroupingthatcontainsoneormorefixedradioterminationsplustheirassociatedportableradiotermination.TheboundariesoftheDECTnetworkarenotphysicalboundaries.DECTintermediatefixedsystem:logicalgroupingthatcontainsallthefunctionsbetweentheDECTDIreferencepointandthereferencepointonthefixedsideoftheDECTairinterfaceNOTE7:TheDECTIntermediateFixedSystem(DIFS)=FT+(localnetworkuptothefixedsideISDNreferencepoint(includingfixedsideInterworkingUnit(IWU)),seeETR056[13].DECTintermediateportablesystem:logicalgroupingthatcontainsallthefunctionsbetweentheDECTDIreferencepointandtheISDNSreferencepointontheportablesideoftheDECTairinterfaceNOTE8:TheDECTIntermediatePortableSystem(DIPS)=PortableradioTermination(PT)+PortableApplication(PA)uptotheportablesideISDNSreferencepoint(includingportablesideIWU),seeETR056[13].FixedRadioTermination(FT):logicalgroupoffunctionsthatcontainsalloftheDECTprocessesandproceduresonthefixedsideoftheDECTairinterfaceNOTE9:AFTonlyincludeselementsthataredefinedintheDECTCommonInterface(CI)standard.Thisincludesradiotransmissionelementstogetherwithaselectionoflayer2andlayer3elements.handover:processofswitchingacallinprogressfromonephysicalchanneltoanotherphysicalchannelNOTE10:Therearetwophysicalformsofhandover,intra-cellhandoverandinter-cellhandover.incomingcall:callreceivedataCTAinter-cellhandover:switchingofacallinprogressfromonecelltoanothercellinternalhandover:handoverprocessesthatarecompletelyinternaltooneFT.Internalhandoverreconnectthecallatthelowerlayers,whilemaintainingthecallattheNWKlayerNOTE11:ThelowerlayerreconnectioncaneitherbeattheDataLinkControl(DLC)layer(connectionhandover)orattheMAClayer(bearerhandover).interoperability:capabilityofFPsandCTAs,thatenablesaCTAtoobtainaccesstoteleservicesinmorethanonelocationareaand/orfrommorethanoneoperator(morethanoneserviceprovider)InterworkingUnit(IWU):unitthatisusedtointerconnectsubnetworksNOTE12:TheIWUwillcontaintheinterworkingfunctionsnecessarytosupporttherequiredsubnetworkinterworking.intra-cellhandover:switchingofacallinprogressfromonephysicalchannelofonecelltoanotherphysicalchannelofthesamecellLocalNetwork(LNW):telecommunicationnetworkcapableofofferinglocaltelecommunicationservicesNOTE13:Thetermdoesnotincludelegalorregulatoryaspects,nordoesitindicateifthenetworkisapublicnetworkoraprivatenetwork.SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)9locationarea:domaininwhichaCTAmayreceive(and/ormake)callsasaresultofasinglelocationregistrationlocationregistration:processwherebythepositionofaDECTPTisdeterminedtothelevelofonelocationarea,andthispositionisupdatedinoneormoredatabasesNOTE14:ThesedatabasesarenotincludedwithinaDECTFT.MACConnection(CONNECTION):associationbetweenonesourceMACMulti-BearerControl(MBC)entityandonedestinationMACMBCentity.ThisprovidesasetofrelatedMACservices(asetoflogicalchannels),anditcaninvolveoneormoreunderlyingMACbearers.mobilityclass1:localareaapplications,forwhichterminalsarepre-registeredoff-airwithoneormorespecificfixedparts,andestablishmentofserviceanduserparametersisthereforeimplicit,accordingtoaprofile-definedlistmobilityclass2:privateandPublicroamingapplicationsforwhichterminalsmaymovebetweenfixedpartswithinagivendomainandforwhichassociationofserviceparametersisexplicitatthetimeofservicerequestoutgoingcall:calloriginatingfromaCTAPortableApplication(PA):logicalgroupingthatcontainsalltheelementsthatliebeyondtheDECTnetworkboundaryontheportablesideNOTE15:ThefunctionscontainedinthePAmaybephysicallydistributed,butanysuchdistributionisinvisibletotheDECTnetwork.PortablePart(DECTPortablePart)(PP):physicalgroupingthatcontainsallelementsbetweentheuserandtheDECTairinterface.PPisagenerictermthatmaydescribeoneorseveralphysicalpieces.NOTE16:ADECTPPislogicallydividedintoonePTplusoneormorePAs.PortableradioTermination(PT):logicalgroupoffunctionsthatcontainsalloftheDECTprocessesandproceduresontheportablesideoftheDECTairinterfaceNOTE17:APTonlyincludeselementsthataredefinedintheDECTCIstandard.Thisincludesradiotransmissionelements(layer1)togetherwithaselectionoflayer2andlayer3elements.RadioFixedPart(RFP):onephysicalsub-groupofaFPthatcontainsalltheradioendpoints(oneormore)thatareconnectedtoasinglesystemofantennasregistration:ambiguoustermthatshouldalwaysbequalified.SeeeitherlocationregistrationorsubscriptionregistrationservicetypeA:lowspeedframerelay,withanetsustainablethroughputofupto24kbits/s,optimizedforburstydata,lowpowerconsumptionandlowcomplexityapplicationssuchashand-portableequipmentservicetypeB:highperformanceframerelay,withanetsustainablethroughputofupto552kbits/s,optimizedforhighspeedandlowlatencywithburstydata.EquipmentimplementationtheTypeBprofileshallinter-operatewithTypeAequipment.servicetypeC:non-transparentconnectionofdatastreamsrequiringLinkAccessProtocol(LAP)services,optimizedforhighreliabilityandlowadditionalcomplexity.ThisbuildsupontheservicesofferedbythetypeAorBprofiles.servicetypeE:shortmessagetransferorpagingservicewhichmaybeunacknowledgedoracknowledged,optimizedforsmallServiceDataUnits(SDUs),lowPPcomplexityandultra-lowpowerconsumptionservicetypeF:applicationprofilespecificallysupportingteleservicessuchasfax,buildingupontheservicesofferedbythetypeA/BandCprofiles,optimizedforterminalsimplicity,spectrumefficiencyandnetworkflexibilitysubscriptionregistration:infrequentprocesswherebyasubscriberobtainsaccessrightstooneormoreFPsNOTE18:Subscriptionregistrationisusuallyrequiredbeforeausercanmakeorreceivecalls.WirelessRelayStation(WRS):physicalgroupingthatcombineselementsofbothPTsandFTstorelayinformationonaphysicalchannelfromoneDECTterminationtoaphysicalchanneltoanotherDECTterminationNOTE19:TheDECTterminationcanbeaPToraFToranotherWRS.SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)103.2SymbolsForthepurposesofthepresentdocument,thefollowingsymbolsapply:MMandatorytosupport(provisionmandatory,processmandatory);OOptionaltosupport(provisionoptional,processmandatory);Iout-of-scope(provisionoptional,processoptional)notsubjectfortesting;CConditionaltosupport(processmandatory);N/ANotApplicable(inthegivencontextthespecificationmakesitimpossibletousethiscapability.Provisionmandatory,processmandatorymeansthattheindicatedfeature,serviceorprocedureshallbeimplementedasdescribedinthepresentdocument,andmaybesubjecttotesting.Provisionoptional,processmandatorymeansthattheindicatedfeature,serviceorproceduremaybeimplemented,andifimplemented,thefeature,serviceorprocedureshallbeimplementedasdescribedinthepresentdocument,andmaybesubjecttotesting.NOTE:TheusednotationisbasedonthenotationproposedinISO/IEC9646-7[11].3.3AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ACAuthenticationCodeARIAccessRightsIdentityCCreferencepointC/OConnectionOrientedCCCallControlCICommonInterfaceCPECustomerPremisesEquipmentCTACordlessTerminalAdapterDECTDigitalEnhancedCordlessTelecommunicationsDIFSDECTIntermediateFixedSystemDIPSDECTIntermediatePortableSystemDLCDataLinkControlDTEDataTerminalEquipmentFPFixedPartFTFixedradioTerminationGAPGenericAccessProfileIEInformationElementIIPIntermediateISDNaccessProfileIPInternetProtocolIPUIInternationalPortableUserIdentityISDNIntegratedServicesDigitalNetworkISDNIntegratedServicesDigitalNetworkIWUInterworkingUnitLNWLocalNetworkMACMediumAccessControlMBCMulti-BearerControlMMMobilityManagementNCPPPPNetworkControlProtocolNT1NetworkTermination1NT2NetworkTermination2NWKNetworkOA&MOperation,AdministrationandMaintenancePPreferencepointPPublic(environment)PAPortableApplicationPARKPortableAccessRightsKeyPCPersonalComputerPHLPhysicalLayerSIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)11POTPlainOldTelephonePOTSPlainOldTelephoneServicePPPortablePartPPPPoint-to-PointProtocolPSTNPublicSwitchedTelephoneNetworkPTPortableradioTerminationRRreferencepointRAPRLLAccessProfileRFPRadioFixedPartRLLRadiointheLocalLoopRSSIRadioSignalStrengthIndicatorSSreferencepointS/TS/TreferencepointSDUServiceDataUnitTTreferencepointTATerminalAdapterTETerminalEquipmentTE1ISDNterminalTITransactionIdentifierUAKUserAuthenticationKeyUSBUniversalSerialBusWRSWirelessRelayStation4Descriptionofservices4.1ReferencemodelRAPPublicGAPISDNTEPCETS300700CordlessTerminalAdapterCTAWirelessRelayStationWRSRAP(IIP)RAP(data)PortablePartPPPOTSCPEFigure1:RAPReferenceModelSIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)124.2Services&facilitiesTheRadiointhelocalloopAccessProfile,RAP,Part2AdvancedTelephonyServices,allowstheprovisionthroughDECTofaservicelevelascurrentlyavailableintheISDNnetwork,andextensionsincludingnon-voicebanddataservicesanddigitalleasedlines.Furthermore,featuresareaddedfortheoperation,administration,andmaintenanceoftheequipment(CTAs)offeringthementionedservicesinthepublicRLLapplication.4.2.1ISDNservicesForthedefinitionoftheISDNservicesthepresentdocumentreferstoETS300822[16],referredtoastheIntermediateISDNaccessProfile(IIP).TheIIPapplieswhenFPandPPtogetherconstituteagatewaybetweenanISDNnetworkandanISDNterminal.TheFPandthePPhaveanIWUthatmapsthemessagesbetweentheISDNinterfaceandtheDECTairinterface.TheIIPspecifieshowISDNservicescanbeprovidedoverDECT.ItisbasedonDECTCommonInterfacespecificationEN300175parts[1]to[8]enableISDNterminalstohavecordlessaccesstoanISDNinfrastructure.BothpublicISDNandprivateISDNarewithinthescopeoftheIIP.Formobilityandsecurity,theIIPisbasedonEN300444[12].UsingtheIIP,theend-userhastransparentaccesstotheISDNservicesandfunctions.Inrespecttobearerservices,thefollowingaresupported:speech,3,1kHzaudio,unrestricted64kbit/sdata,packetdata.InETS300822[16],referenceconfigurationsareusedtodescribethefunctionalgroupingsofDECTandISDNandtheirrelationshipsviareferencepoints.Ingeneral,referencepointsmayormaynotcorrespondtoaphysicalinterface.ThefunctionalgroupingsandreferencepointsaredescribedinITU-TRecommendationI.411[17]forpublicISDN.TheDECTintermediatesystemreferenceconfigurationsareusedwheretheDIFSandDIPStogetherformanintermediatesystemtoconnectanISDN-terminaltoanISDNnetwork.ThefollowingfigureshowstheintermediatesystemreferenceconfigurationforpublicISDN.OtherreferenceconfigurationsaregivenintheIIP,ETS300822[16],butareoutofscopeforthepresentdocument,astheyapplytoprivateISDN.NT2TE1STDIPSDIDIFSIAVDIFS:DECTIntermediateFixedSystemDIPS:DECTIntermediatePortableSystemIA:InterfaceAdapterFigure2:IntermediatesystempublicISDNreferenceconfigurationSIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)134.2.2Non-voicebanddataservicesThepresentdocumentdefinesanumberofadvancednon-voicebanddataservices,basedonthedataservicesprofilesasdescribedinETR185[19].ThedataservicesprofilesspecifyalltheDECTairinterfacerequirementstoensureinteroperabilitybetweenDECTFPsandPPs,orCTAsintheRLLcase.ThisclausedefineshowcertaindataserviceswhichareparticularlyappropriateforRLLapplicationscanbeprovided.However,theprovisionofthesedataservicesisoptional.Thedataservicesdefinedinthisclauseareasfollows:Table1:DataservicesoverviewDataserviceLocalnetworktypeDECTprofileLANserviceEthernetorTokenRingoverLAN/FR/ATMEN301649[18]clauseB.4orB.5.InternetaccessInternetProtocol(IP)overLAN/FR/ATMEN301649[18]clauseB.6.InternetaccessoverPoint-to-PointProtocol(PPP)PPPoverPSTN/ISDN/FR/ATMEN301649[18]clauseB.7.WirelessV.24PSTN/ISDNEN301649[18]clauseCForallDECTdataprofiles,theMobilityClass2shallapplyasitcontainsCCandMMfunctionalityrequiredintheRLLapplication.Clauses4.2.2.1to4.2.2.4defineindetailtherequirementsfortheprovisionofthedataservicesaslistedintable1.AnnexCprovidesadditionalinformationoftherealizationofCTAdataports.4.2.2.1LANserviceTheLANserviceallowsthetransparenttransportofISO8802-3[21](Ethernet)orISO8802-5[21](TokenRing)framesbetweenaCTAdataport,andaFPnetworkdataport.ThisserviceprovidesageneraldataservicebasedonanISO8802[21]MACservice.TheLANserviceisintendedtoprovideconnectionofcomputernodesconnectedtoalocalLANtoanodeinthenetworkatMAClevel.Itallowsawidevarietyofcurrentandfutureapplicationtailoredprotocolsontop.ToprovidetheLANservice,theCTAandFPshallprovidetherequirementslistedinEN301649[18](DPRS).Furthermore,theCTAandFPshallusetheinter-workingproceduresdescribedinEN301649[18],clauseB.4orclauseB.5,dependingontherequiredLANtype.4.2.2.2Internetaccess4.2.2.2.1IPtransportserviceTheIPtransportserviceallowsthetransparenttransportofIPdatagramsbetweenaCTAdataport,andaFPnetworkdataport.ThespecificationsinthisclauseareintendedtoensurefullinteroperabilitybetweenCTAs(PPs)andFPs,regardlessoftheCTAorFPdataportimplementation.OptionsforCTAdataportimplementationaregiveninannexC.TheIPtransportserviceisintendedtoprovidepermanentinternetconnectionofstandalonecomputernodesorLAN'susingIPprotocol.ItallowsthetransparenttransportofanyapplicationprotocoloverIP.ToprovideinternetaccessusingtheIPtransportservice,CTAandFPshallprovidetherequirementslistedinEN301649[18](DPRS).CTAandFPshallusetheinterworkingproceduresdescribedinEN301649[18],clauseB.6.4.2.2.2.2InternetoverPoint-to-PointProtocol(PPP)serviceTheinternetoverPPPserviceallowsthetransportofIPdatagramsencapsulatedoverPPPbetweenaCTAdataport,andaFPdataport.ThisservicewillprovidethetransportofPPP"protocolfield"headerovertheairinterface,allowingtheprovisionofPPPservicesasauthentication,dynamicIPallocation,multilinkaggregation,PPPdatacompression,andanyotherservicesupportedbyPPPNCPs.SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)14Thisserviceisintendedfornon-permanentdial-upconnections,orforanyothertypeofconnectionthatmightrequireanyserviceprovidedbythePPP.TheinternetoverPPPservicealsoprovidescallcontrolsignalling.ToprovideinternetaccessusingtheinternetoverPPPservice,CTAandFPshallprovidetherequirementsandshallusetheproceduresdescribedinEN301649[18].ThespecificationsinthisclauseareintendedtoensurefullinteroperabilitybetweenCTAs(PPs)andFPs,andareonlyapplicabletotheDECTairinterface,regardlessoftheCTAorFPimplementation,andtotheprotocolstackpresentedineither,theCTAandFPdataports.ThespecialcasesofterminatingthesubscribersideofthePPPlinkinsidetheCTA,orterminatingthenetworksideofthePPPlinkintheFPIWUarespecificallyconsidered.InthesecasesinterfaceswithoutPPParepresentedtothesubscriberornetworkdataports.4.2.2.3WirelessV.24ThisclausespecifiesthenormativeaspectsofthewirelessV.24serviceasspecifiedinthepresentdocument.ThespecificationsinthisclauseareintendedtoensurefullinteroperabilitybetweenCTAs(PPs)andFPs,regardlessoftheCTAdataportorFPIWUoptionsgiveninannexesCandD.ToprovidethisserviceCTAandFPshallprovidetherequirementslistedinEN301649[18].CTAandFPshallusetheinterworkingproceduresdescribedinEN301649[18],clauseC.5FeaturedefinitionsForthepurposesofthepresentdocument,thefeaturedefinitionsgiveninthisclauseapply.Thenumbergiveninsquarebracketsafterthenameofafeatureistheitemnumberusedinthetablesofthepresentdocument.NOTE:ThenumberingisalignedwithEN300765-1[15].5.1Network(NWK)featuresThefeaturesapplyonlytooperationandmaintenanceoftheCTAssupportingthevarioustypesofservices(ISDN,non-voicebanddata,anddigitalleasedlines)asdescribedinclause4.FeaturesincommonforallCTAs,applyingtotheDECTpartoftheCTA,havebeencollectedinclause5.1.1,DECTCTAoperationandmaintenancefeatures.FeaturesfortheoperationandmaintenancespecificallyneededincombinationwithaparticulartypeofserviceofferedataCTA(i.e.ISDN,non-voicebanddata,anddigitalleasedlines)arecollectedinseparateclauses.5.1.1DECTCTAOA&Mfeaturesadvancedfiletransfer[N.121]:abilitytotransferfiletotheCTAalarms[N.109]:abilityoftheCTAtoindicatetotheFPthatasignificantsystemeventoccursorisabouttooccurwhichmayseriouslyaffectthesystemsabilitytofunctionincomingmaintenancetransaction[N.102]:abilityoftheCTAtoreceive,andtheFPtosendOA&MmessagesincomingWRSmaintenancetransaction[N.119]:abilityoftheWRStoreceiveOA&MmessagesfromtheFPmaintenanceduringcall[N.104]:abilityoftheCTAandFTtoexchangeOA&MmessagesduringanactivecallmaintenanceduringWRSMMoperation[N.122]:abilityoftheWRStoexchangeOA&MmessageswiththeFPduringanongoingMMoperationon-airmodificationofuserparameters[N.110]:abilityoftheCTAtoacceptFPinitiatedchangesofsubscriptiondataoutgoingmaintenancetransaction[N.103]:abilityoftheCTAtosend,andtheFPtoreceiveOA&MmessagesSIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)15outgoingWRSmaintenancetransaction[N.120]:abilityoftheWRStosendOA&MmessagestotheFPphysicalresourcesfault[N.107]:abilityoftheCTAtocorrespondingOA&Mmessagestoindicatethelocationoffaultsinthephysicalresourcestothenetworkmanagementremoteconfiguration[N.115]:abilitytoconfiguretheparametersoftheCTAviaOA&Mmessagesremotetest[N.108]:abilityoftheFPtorequesttheCTAtorunspecifictests5.1.2ISDNCTAspecificOA&MfeaturesManagementoftheISDNdigitalaccesssectionasnormallycontainedintheNT1iscoveredbyETS300297[20].NOTE:However,ETS300297[20]isstandardizedforawiredISDNnetwork.ApplyingtheprovisionscontainedinthementionedstandardstoawirelessDECTRLLnetworkneedsadaptationandrelaxation,andthisisforfurtherstandardizationoutsidethescopeofthepresentdocument.6Interoperabilityrequirements6.1GeneralThetableslistedinthisclausedefinealltheprotocolelementsi.e.features,services,andprocedureswhicharemandatory,optional,andconditionalundertheprovisionofanotherprotocolelement,oroutofthescopeofthepresentdocument,orinsomecontextnot-applicableaccordingtothedefinitionofthestatuscolumnasdefinedinclause3.5fortheRAPFPandCTA.Alloptionalelementsshallbeprocessmandatoryaccordingtotheproceduresdescribedinthepresentdocument.TherequirementsofEN301406[9]shallbemetbyallequipmentconformingtothepresentdocument.6.2NWKfeatures6.2.1GeneralTheNWKfeaturesofthefollowingprofilesshallbeprovidediftheprofileissupported:1)theDECT-IIPasdefinedinETS300822[16];2)theDECTdataprofileasdefinedinEN301649[18];6.2.2OA&MfeaturesTable2:NWKfeaturesstatusFeaturesupportedStatusItemnumberNameoffeatureRef.CTAFTN.102Incomingmaintenancetransaction5.1.1MMN.103Outgoingmaintenancetransaction5.1.1MMN.104Maintenanceduringcall5.1.1MMN.107Physicalresourcesfault5.1.1MMN.108Remotetest5.1.1MMN.109Alarms5.1.1OON.110On-airmodificationofuserparameters5.1.1OON.115Remoteconfiguration5.1.1OON.119IncomingWRSmaintenancetransaction5.1.1N/AON.120OutgoingWRSmaintenancetransaction5.1.1N/AON.121Advancedfiletransfer5.1.1OON.122MaintenanceduringWRSMMoperation5.1.1N/AOSIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)166.3DLCservicesTheDLCservicesofthefollowingprofilesshallbeprovidediftheprofileissupported:1)theDECT-IIPasdefinedinETS300822[16];2)theDECTdataprofileasdefinedinEN301649[18];6.4MACservices6.4.1GeneralTheMACservicesofthefollowingprofilesshallbeprovidediftheprofileissupported:1)theDECT-ISDNintermediatesystemasdefinedinETS300822[16];2)theDECTdataprofileasdefinedinEN301649[18];6.4.2BlindslotinformationItismandatoryforRFPsthathaveblindslots,duetonon-duplexbeareroperationonthatslot(i.e.thoseRFPsthathavetechnologicallimitationssuchasaslowsynthesizer),toperiodicallyannouncetheseblindslots(atleastevery10s).IntheeventtheRFPannouncesblindslotinformation,suchinformationmayalsoincludeallblindslotsduetoanactivebeareraswell.Notavailable(blind)slotmeansthattheFPrecommendstheCTAnottoattemptaset-uponthisslot.IftheCTAreceivesblindslotinformation,itismandatoryforthatCTAtouseitintheprocessofchannelselection.TheCTAdoesnothavetowaitfortheblindslotinformationbeforemakingthechannelselection.6.4.3ImprovedchannelselectionrulesInadditiontousingtheblindslotinformationbeforemakingthechannelselectionasdefinedinclause6.4.2,theCTAisrecommendedtofollowthealgorithmdefinedbelowforsingleslotchannelselection.WithoutviolatingthebasicDECTchannelselectionrules,forsingleslotchannelselectiontheCTAshouldgiveprioritytothefollowingtypesofchannels:1)availablechannelcandidatesonevenslotpositionswithanactivechannelontheadjacentslotpositiontotheright;2)availablechannelcandidatesonoddslotpositionswithanactivechannelontheadjacentslotpositiontotheleft.NOTE:Thisalgorithmresultsinpackingofsingleslotsintodoubleslotlocations(doubleslotsareonlyallowedtostartonevenslotpositions).TheDECTchannelrulesshallnotbeviolated.ThisimpliesthattherulesdescribedabovecanonlybeappliedtothechannelsthatarewithinthesameRadioSignalStrengthIndicator(RSSI)band.6.4.4AdvancetimingIftheFTwantstoalignthePTtransmissiontotheFTframetimingofalinkbyrequestingthePTtocompensateforthepropagationdelayintheactivebearerswithanFT,itshallsendtheMACqualitycontrolmessage"advancetimingrequest"(AfieldorBfield,seeEN300175-3[3],clause7.2.5.5).TheFTshouldsendanadvancetimingmessagerequestassoonasithasareliablemeasurementofthePTtransmittiming.SIST EN 300 765-2 V1.2.1:2003

ETSIETSIEN300765-2V1.2.1(2001-02)17ItisrecommendedthattheFTsendstheadvancetimingrequestmessageonlyiftheFTdetectsaPTtimingdifferencefromthenominalonegreaterthan(2+20,868)µs(seeEN300175-3[3]),i.e.iftheFTreceivesthePTtransmissionoutsidethenominalFTreceivewindow.ItisrecommendedthattheFTchoosesthenumberofcompensatebitsintheadvancetimingrequestmessagesuchthattheFTwillfinallyreceivethePTtransmissionintheFTreceivewindow.Toguaranteeastablecontrolloop,theFTshallnotbeallowedtousetimingmeasurementsolderthan10frames,atthetransmissionoftheadvancetimingrequestmessage.Withina10-frametimeinterval,theadvancetimingrequestmessagecanberetransmitteduntilanacknowledgedreceptionoftheframe(Q-bitsetting)hasbeenreceived.InthistimeintervalthePTisrequiredtointerpretonlyoneofthereceivedadvancetimingrequestmessages.Afterreceivinganacknowledgedreceptionoftheframe(Q-bitsetting)upontransmissionofth
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