SIST EN 300 199 V1.2.1:2004

• Abstract:

  Update of the interaction between the CFB and Completion of Calls to Busy Subscriber (CCBS) supplementary services. This is the version 2 on ETS 300 199.

• Status: Published
• Publication Date: 31-Mar-2004
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2004
• Due Date: 01-Apr-2004
• Completion Date: 01-Apr-2004
• Ref Project: ETSI EN 300 199 V1.2.1 (2001-06) - Integrated Services Digital Network (ISDN); Call Forwarding Busy (CFB) supplementary service; Service description

SIST EN 300 199 V1.2.1:2004 is the SIST version of the European standard for Integrated Services Digital Network (ISDN) Call Forwarding Busy (CFB) supplementary service. It gives the stage 1 service description for CFB, so it specifies how the service behaves for users and service providers, including activation, forwarding, interrogation, and interaction with other supplementary services.

What does SIST EN 300 199 V1.2.1:2004 specify?

SIST EN 300 199 V1.2.1:2004 defines the stage 1 description of the ISDN Call Forwarding Busy (CFB) supplementary service as provided on the pan-European ISDN. It is the user-facing service description that underpins the later stage 2 and stage 3 specifications.

The scope covers interworking of private ISDNs with the public ISDN and the base functionality when the service is delivered via a private ISDN. It excludes charging principles, human interface detail, and interaction with supplementary services not listed in clause 7.

The document is organized into these main parts:

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definitions and abbreviations
• Clause 4 - Description
• Clause 5 - Procedures
• Clause 6 - Intercommunication considerations
• Clause 7 - Interaction with others supplementary services
• Annex A - Bibliography

What are the key requirements of SIST EN 300 199 V1.2.1:2004?

Service availability and subscription

Clause 4 states that CFB is available to users connected by basic access or primary rate access. The service forwards calls addressed to the served user’s ISDN number when the call meets busy, and the served user’s ability to originate calls is not affected.

Clause 5.1 says the service is provided only after prior arrangement with the service provider. It may apply to the whole access or per ISDN number, and it may be set for all subscribed basic services or for selected basic services. In practice, that means the operator must support service provisioning at the level the customer has subscribed to.

Clause 4 also allows service-provider options for notifications to the served user and calling user, and for presenting the served user’s ISDN number to the forwarded-to user. A service-provider option also limits the number of diversions per call, with an upper limit of five diversions.

Activation, deactivation, and interrogation

Clause 5.2.2 requires the served user to supply the forwarded-to user’s ISDN number, possibly with subaddress, and the basic service scope when activating CFB. If the service applies per ISDN number and more than one number exists on the access, the relevant ISDN number must also be supplied unless the subscription allows a single request for all numbers.

Clause 5.2.2 and 5.2.4 make activation, deactivation, and interrogation work at either access level or per ISDN number, depending on how the subscription is set up. In practice, this means customer support and network interfaces need to handle both single-number and whole-access administration.

Clause 5.2.4 requires interrogation to return whether CFB is active and, when active, the forwarded-to user’s address and the basic service or services covered. Where supported, interrogation can also list the ISDN numbers on the access for which CFB is active.

Call forwarding behavior and failure handling

Clause 5.2.3 states that an incoming call is forwarded when CFB is active and the served user is busy, either user determined user busy or network determined user busy. For user determined user busy, the call is first offered to the served user; for network determined user busy, it is forwarded without being offered.

Clause 5.3.3 sets the fallback behavior if forwarding cannot be completed. If the call cannot be completed to the forwarded-to user, the forwarded part is terminated and the call either ends by basic call procedures or returns to the previous diverting user, depending on whether another diversion had already been invoked. This matters because it defines what the network should do instead of leaving the call in an undefined state.

Clause 5.3.3 also says calls for a basic service that is not subscribed to, or not activated for CFB, are not forwarded. If the diversion limit is reached, another CFB invocation is not attempted.

Interaction with other services

Clause 7 describes how CFB interacts with other supplementary services. The most important point for this edition is clause 7.7 on Completion of Calls to Busy Subscriber (CCBS), which states how CCBS recalls are treated when CFB is active.

Clause 7 also states precedence and notification rules for services such as call forwarding unconditional, call waiting, number identification services, closed user group, freephone, malicious call identification, subaddressing, and user-to-user signalling. In practice, this is the part that service designers and switch engineers use to avoid conflicting behavior between services.

What terms does SIST EN 300 199 V1.2.1:2004 define?

• served user - the user to whom CFB is provided.
• forwarded-to user - the user to whom the call is redirected by forwarding.
• diverting user - the user for whom the call is subjected to diversion.
• user A - the calling user in a call that is subject to diversion.
• user B - the served user when user A’s call is subject to CFB.
• user C - the forwarded-to user in a call subject to CFB.
• network determined user busy - the network determines that the served user is busy.
• user determined user busy - the served user indicates busy after the call is offered.

Who uses SIST EN 300 199 V1.2.1:2004?

Telecommunications operators use this standard to define how they offer CFB on ISDN access and how they provision, activate, deactivate, and interrogate the service. Network engineers and switch vendors use it to implement forwarding behavior, notification handling, and service interactions.

It is also used by teams working on private ISDN interworking, numbering, and supplementary-service compatibility. Quality managers and buyers use it to check whether an ISDN service or platform supports the CFB behavior they need.

What changed in SIST EN 300 199 V1.2.1:2004 from the previous edition?

SIST EN 300 199 V1.2.1:2004 is described as version 2 on ETS 300 199. The scope states that this version updates the interaction between the CFB and Completion of Calls to Busy Subscriber (CCBS) supplementary services.

Which standards are used with SIST EN 300 199 V1.2.1:2004?

• ITU-T I.130 - the three-level method used to describe telecommunication services.
• ITU-T I.112 - vocabulary for ISDNs, used for terms such as basic service and ISDN.
• ITU-T I.221 - common service characteristics, including the definitions of busy conditions.
• ITU-T I.210 - principles for telecommunication services supported by ISDN.
• ITU-T E.164 - numbering plan and number structure used for ISDN numbers.
• ITU-T Q.9 - switching and signalling vocabulary, used for access terms such as basic access and primary rate access.
• ETS 300 203 - stage 2 functional capabilities and information flows for ISDN CFB.
• EN 300 207-1 - stage 3 DSS1 protocol specification for diversion supplementary services.
• EN 300 356-15 - stage 3 ISUP diversion supplementary services for the international interface.

What does the SIST EN 300 199 V1.2.1:2004 document contain?

Clause 5 gives the procedures for provision, withdrawal, registration, activation, deactivation, invocation, operation, and interrogation. It also includes rejection cases and the handling of failed forwarding attempts.

Clause 6 covers intercommunication with non-ISDNs and private ISDNs, including how forwarded information is passed across network boundaries. Clause 7 gives the service interactions that matter in practice, especially notification, numbering, and diversion behavior.

Table 1 summarizes the subscription options for user notifications and number presentation. Annex A provides the bibliography used by the standard.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalno omrežje z integriranimi storitvami (ISDN) - Dopolnilna storitev: predaja klica ob zasedenosti (CFB) - Opis storitveIntegrated Services Digital Network (ISDN); Call Forwarding Busy (CFB) supplementary service; Service description33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 199 Version 1.2.1SIST EN 300 199 V1.2.1:2004en01-april-2004SIST EN 300 199 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300199V1.2.1(2001-06)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);CallForwardingBusy(CFB)supplementaryservice;ServicedescriptionSIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)2ReferenceREN/SPAN-110105KeywordsCF,ISDN,stage1,supplementaryserviceETSI650RoutedesLuciolesF-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 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)3ContentsIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitionsandabbreviations.63.1Definitions.63.2Abbreviations.74Description.75Procedures.75.1Provisionandwithdrawal.75.2Normalprocedures.85.2.1Registrationanderasure.85.2.1.1Registration.85.2.1.2Erasure.85.2.2Activationanddeactivation.85.2.2.1Activation.85.2.2.2Deactivation.95.2.3Invocationandoperation.105.2.3.1Serveduserisuserdetermineduserbusy.105.2.3.2Serveduserisnetworkdetermineduserbusy.105.2.3.3Forwarded-touser'sview.115.2.3.4Callinguser'sview.115.2.4Interrogation.125.3Exceptionalprocedures.135.3.1Registrationanderasure.135.3.2Activationanddeactivation.135.3.2.1Activation.135.3.2.2Deactivation.145.3.3Invocationandoperation.145.3.4Interrogation.156Intercommunicationconsiderations.156.1Interworkingwithnon-ISDNs.156.2InterworkingwithprivateISDNs.157Interactionwithothersupplementaryservices.167.1Adviceofchargeservices.167.1.1Charginginformationatcallset-uptime.167.1.2Charginginformationduringthecall.167.1.3Charginginformationattheendofthecall.167.2Callwaiting.167.3Callhold.167.4Explicitcalltransfer.167.5Numberidentificationservices.177.5.1Callinglineidentificationpresentation.177.5.2Callinglineidentificationrestriction.177.5.3Connectedlineidentificationpresentation.177.5.4Connectedlineidentificationrestriction.177.6Closedusergroup.177.7Completionofcallstobusysubscriber.187.8Conferenceservices.187.8.1Conferencecall,add-on.187.8.2Meet-meconference.187.9Directdiallingin.18SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)47.10Diversionservices.187.10.1Callforwardingunconditional.187.10.2Callforwardingbusy.187.10.3Callforwardingnoreply.197.10.4Calldeflection.197.11Freephone.197.12Maliciouscallidentification.197.13Multiplesubscribernumber.197.14Subaddressing.197.15Terminalportability.197.16Threeparty.197.17User-to-usersignalling.20AnnexA(informative):Bibliography.21History.22SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)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)hasbeenproducedbyETSITechnicalCommitteeServicesandProtocolsforAdvancedNetworks(SPAN).InaccordancewithITU-TRecommendationI.130[1],thefollowingthreelevelstructureisusedtodescribethesupplementarytelecommunicationsservicesasprovidedbyEuropeanpublictelecommunicationsoperatorsunderthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN):-Stage1:isanoverallservicedescription,fromtheuser'sstandpoint;-Stage2:identifiesthefunctionalcapabilitiesandinformationflowsneededtosupporttheservicedescribedinstage1;and-Stage3:definesthesignallingsystemprotocolsandswitchingfunctionsneededtoimplementtheservicedescribedinstage1.Thepresentdocumentdetailsthestage1aspects(overallservicedescription)fortheCallForwardingBusy(CFB)supplementaryservice.Thestage2aredetailedinETS300203(1994)andstage3aspectsaredetailedinEN300207-1(V2.0.1)andEN300356-15(V3.2.2).NationaltranspositiondatesDateofadoptionofthisEN:1June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)61ScopeThepresentdocumentdefinesthestageoneoftheCallForwardingBusy(CFB)supplementaryserviceforthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN)asprovidedbyEuropeanpublictelecommunicationsoperators.Stageoneisanoverallservicedescriptionfromtheuser'spointofview(seeITU-TRecommendationI.130[1]),butdoesnotdealwiththedetailsofthehumaninterfaceitself.ThepresentdocumentdefinestheinterworkingrequirementsofprivateISDNswiththepublicISDN.InadditionthepresentdocumentspecifiesthebasefunctionalitywheretheserviceisprovidedtotheuserviaaprivateISDN.ThepresentdocumentdoesnotspecifytheadditionalrequirementswheretheserviceisprovidedtotheuserviaatelecommunicationsnetworkthatisnotanISDNbutdoesincludeinterworkingrequirementsofothernetworkswiththepublicISDN.Chargingprinciplesareoutsidethescopeofthepresentdocument.Interactionwithsupplementaryservicesnotlistedinclause7isoutsidethescopeofthepresentdocument.TheCFBsupplementaryserviceenablesaservedusertohavethenetworkredirecttoanotherusercallswhichareaddressedtotheserveduser'sISDNnumberandmeetbusy.TheCFBsupplementaryservicemayoperateonallcalls,orjustthoseassociatedwithspecifiedbasicservices.Theserveduser'sabilitytooriginatecallsisunaffectedbytheCFBsupplementaryservice.TheCFBsupplementaryserviceisapplicabletoallcircuit-switchedtelecommunicationservices.ThepresentdocumentisapplicabletothestagetwoandstagethreedocumentsfortheISDNCFBsupplementaryservice.Theterms"stagetwo"and"stagethree"arealsodefinedinITU-TRecommendationI.130[1].Wherethetextindicatesthestatusofarequirement,(i.e.asstrictcommandorprohibition,asauthorizationleavingfreedom,asacapabilityorpossibility),thisshallbereflectedinthetextoftherelevantstagetwoandstagethreedocuments.Furthermore,conformancetothepresentdocumentismetbyconformingtothestagethreedocumentswiththefieldofapplicationappropriatetotheequipmentbeingimplemented.Therefore,nomethodoftestingisprovidedforthepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ITU-TRecommendationI.130(1988):"MethodforthecharacterizationoftelecommunicationservicessupportedbyanISDNandnetworkcapabilitiesofanISDN".[2]ITU-TRecommendationI.112(1993):"VocabularyoftermsforISDNs".[3]ITU-TRecommendationI.221(1993):"Commonspecificcharacteristicsofservices".[4]ITU-TRecommendationI.210(1993):"PrinciplesoftelecommunicationservicessupportedbyanISDNandthemeanstodescribethem".[5]ITU-TRecommendationE.164(1997):"Theinternationalpublictelecommunicationnumberingplan".[6]ITU-TRecommendationQ.9(1988):"Vocabularyofswitchingandsignallingterms".SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)73Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:address:seeITU-TRecommendationE.164[5],clause12basicaccess:seeITU-TRecommendationQ.9[6],clause1,definition1551basiccallprocedures:proceduresbywhichacall(asaninstanceofabasictelecommunicationservice)isestablishedandterminated(basic)service;telecommunicationsservice:seeITU-TRecommendationI.112[2],clause2.2,definition201busy:seeITU-TRecommendationI.221[3],clause3.1.5(call)forwarding:generaltermappliedtoanyfunctionalitywherebyacallisredirectedautomaticallybytheserviceprovidertoanotheruser.Theformsofforwardingare:unconditional,wherebyallcallsareredirected;busy,wherebycallsencounteringbusyareredirected;and,noreply,wherebycallswhicharenotansweredwithinatimeperiodareredirected.diverted-touser:usertowhomacallisredirectedasaresultofdiversiondiversion:generaltermwhichincludesallformsofforwarding,andincludesdeflectionwherebycallsareredirectedbytheuserinsteadofbeinganswereddivertinguser:userforwhomthecallissubjectedtodiversionforwarded-touser:usertowhomthecallisredirectedasaresultofforwardingIntegratedServicesDigitalNetwork(ISDN):seeITU-TRecommendationI.112[2],clause2.3,definition308ISDNnumber:numberconformingtothenumberingplanandstructurespecifiedinITU-TRecommendationE.164[5]networkdetermineduserbusy:seeITU-TRecommendationI.221[3],clause3.1.4primaryrateaccess:seeITU-TRecommendationQ.9[6],clause1,definition1552serveduser:usertowhomtheCFBsupplementaryserviceisprovidedsubaddress:seeITU-TRecommendationE.164[5],clause12.2supplementaryservice:seeITU-TRecommendationI.210[4],clause2.4userA:callinguserinacallwhichissubjecttodiversionuserB:serveduserwhenacall(fromuserA)issubjecttotheCFBsupplementaryserviceNOTE:Inthecontextofmultiplediversions,asuffixisused,e.g.1,2,.n,n+1,.m,todenotethesuccessivedivertingusers.Forexample,userB3isalsothediverted-touserwithrespecttothediversionappliedatuserB2.userC:forwarded-touserinacallwhichissubjecttotheCFBsupplementaryservice.Inthecaseofacallwhichissubjecttomultiplediversions,userCistheforwarded-touserwithrespecttothefinalcallforwarding.userdetermineduserbusy:seeITU-TRecommendationI.221[3],clause3.1.4SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)83.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:CFBCallForwardingBusyISDNIntegratedServicesDigitalNetworkPSTNPublicSwitchedTelephoneNetwork4DescriptionTheCFBsupplementaryserviceshallbeavailabletouserswhoareconnectedtothenetworkviaabasicaccessoraprimaryrateaccess.TheCFBsupplementaryserviceenablesaservedusertohavethenetworkredirecttoanotherusercallswhichareaddressedtotheserveduser'sISDNnumberandmeetbusy.TheCFBsupplementaryservicemayoperateonallcalls,orjustthoseassociatedwithspecifiedbasicservices.Theserveduser'sabilitytooriginatecallsisunaffectedbytheCFBsupplementaryservice.Asaserviceprovideroption,asubscriptionoptioncanbeprovidedtoenabletheservedusertoreceiveanindicationthattheCFBsupplementaryservicehasbeenactivated.ThisindicationshallbeprovidedwhentheserveduseroriginatesacalliftheCFBsupplementaryservicehasbeenactivatedfortheserveduser'sISDNnumberandforthebasicservicerequestedforthecall.Themaximumnumberofdiversionspermittedforeachcallisaserviceprovideroptionwithanupperlimitoffivediversions.Whencountingthenumberofdiversions,alltypesofdiversionareincluded.5Procedures5.1ProvisionandwithdrawalTheCFBsupplementaryserviceshallbeprovidedafterpriorarrangementwiththeserviceprovider.Asaserviceprovideroption,theCFBsupplementaryservicecanbeprovidedonaperISDNnumberbasis,ortheCFBsupplementaryservicecanapplytothewholeaccess.Ifaserviceprovideroffersbothoftheseoptions,thenitshallbeasubscriptionoptiontochoosewhichoftheseoptionsapplies.Inaddition,theCFBsupplementaryservice(includingoptions)canbesubscribedtoforallbasicservicessubscribedtobytheuser,orasaserviceprovideroption,theusercanidentifyparticularbasicservice(s)forwhichtheCFBsupplementaryserviceshallapply.Asaserviceprovideroption,theservicecanbeofferedwithoneormoreoffoursubscriptionoptions,whichcanapplyseparatelytoeachbasicservicesubscribedto.IftheCFBsupplementaryserviceisprovidedonaperISDNnumberbasis,thentheseoptionscanapplyseparatelytoeachISDNnumber.Foreachsubscriptionoption,onlyonevaluecanbeselected.Subscriptionoptionsaresummarizedintable1.SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)9Table1SubscriptionoptionsValueServeduserreceivesnotificationthatthecallhasbeenforwarded-no-yesCallinguserreceivesnotificationthatthecallhasbeenforwarded-no-yes,withouttheISDNnumberoftheforwarded-touser-yes,withtheISDNnumberoftheforwarded-touserServeduserreceivesnotificationthattheCFBsupplementaryserviceiscurrentlyactivated-no-yesTheservedusersISDNnumbercanbepresentedtotheforwarded-touser-no-yesAsaserviceprovideroption,asubscriptionoptioncanbeofferedtoserveusers,toenabletheCFBsupplementaryservicetobeactivated,deactivatedandinterrogatedforallISDNnumbersonthesameaccess.ISDNnumbersforwhichtheCFBsupplementaryserviceisnotsubscribedtoshallnotbeaffected.TheCFBsupplementaryserviceshallbewithdrawnbytheserviceprovideruponrequestofthesubscriber,orforserviceproviderreasons.5.2Normalprocedures5.2.1Registrationanderasure5.2.1.1RegistrationRegistrationofinformationisperformedonactivationoftheCFBsupplementaryservice.TherearenoseparateregistrationproceduresfortheCFBsupplementaryservice.5.2.1.2ErasureNotapplicable.5.2.2Activationanddeactivation5.2.2.1ActivationTheservedusershallsupplythefollowinginformationwhenrequestingtheactivationoftheCFBsupplementaryservice:-theISDNnumberoftheforwarded-touser,whichcanbeaccompaniedbyasubaddressforadditionalidentificationoftheforwarded-touser;and-informationastowhethertheactivationoftheCFBsupplementaryserviceisforallbasicservicestowhichtheCFBsupplementaryserviceapplies,orforaspecificbasicserviceoutofthebasicservicestowhichtheCFBsupplementaryserviceapplies.SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)10WhensubscriptionappliesonaperISDNnumberbasisandmorethanoneISDNnumberisallocatedtotheaccess,then:-theservedusershallalsosupplytheISDNnumberforwhichtheactivationoftheCFBsupplementaryserviceshallapply,or;-asaserviceprovideroption,theservedusercan,ifsubscribedto,indicatethattheactivationoftheCFBsupplementaryserviceshallapplyforallISDNnumbersforwhichtheCFBsupplementaryserviceissubscribedto.Inthiscase,thisactivationshallreplaceanypreviousactivationoftheCFBsupplementaryservicewhichmaybeinforceonindividualISDNnumbersontheaccess,forthebasicservicesindicatedatactivation.Whensubscriptionappliesforthewholeaccess,oronlyoneISDNnumberisallocatedtotheaccess,theserveduserneednotprovideanISDNnumbertoidentifytheserveduser.IftheserveduserincludesanISDNnumberallocatedtothataccess,orindicatesthattheactivationoftheCFBsupplementaryserviceshallapplytoallISDNnumbers(ifthisfunctionalityisofferedbytheserviceproviderandsubscribedtobytheserveduser)thentheISDNnumber,ortheindicationofallISDNnumbers,shallbeignored.ActivationoftheCFBsupplementaryserviceshallproceedasnormal.TheservedusercanseparatelyactivatetheCFBsupplementaryserviceforeachbasicservicetowhichtheCFBsupplementaryserviceappliesandtherebyrequestadifferentISDNnumberand/orsubaddresstoidentifytheforwarded-touserforeachbasicservicetowhichtheCFBsupplementaryserviceapplies.WhentheCFBsupplementaryserviceisactivatedforallbasicservices,thisactivationshallreplaceanypreviousactivationoftheCFBsupplementaryservicewhichmaybeinforceonindividualbasicservices.VerificationoftheISDNnumberoftheforwarded-tousercanbecarriedoutbeforeacceptingtherequesttoactivatetheCFBsupplementaryservice.Thisverificationcanbelimited,e.g.asimplecheckoftheISDNnumberoftheforwarded-tousertoseeiftheISDNnumberiswithintheallowednumberrange.Whentheserveduser'srequesttoactivatetheCFBsupplementaryserviceisaccepted,theserviceprovidershallinformtheserveduser.Theinformationshallincludetheaddressoftheforwarded-tousertowhomtheserveduserhasactivatedtheCFBsupplementaryservice.Allaffectedusersshallbeinformed.5.2.2.2DeactivationTheCFBsupplementaryservicecanbedeactivatedinanyofthefollowingways:-theservedusercanrequestthedeactivationoftheCFBsupplementaryserviceforindividualbasicservices.TheserviceprovidershallinformtheserveduserthatthepreviousactivationoftheCFBsupplementaryservicehasbeendeactivated.Allaffectedusersshallbeinformed;-theservedusercanrequestthedeactivationoftheCFBsupplementaryserviceforallbasicservices.TheserviceprovidershallinformtheserveduserthatthepreviousactivationoftheCFBsupplementaryservicehasbeendeactivated.Allaffectedusersshallbeinformed;-theservedusercanrequesttheactivationoftheCFBsupplementaryserviceindicatingabasicserviceforwhichtheCFBsupplementaryservicehasalreadybeenactivated.Thisshallreplacethepreviousinformationregisteredforthatbasicservice.Inthiscase,usersshallnotbespecificallyinformedofthedeactivation.Theproceduresofclause5.2.2.1forinformingtheserveduserapply;-theservedusercanrequesttheactivationoftheCFBsupplementaryserviceforallbasicservices.ThisshallreplacetheinformationregisteredforallofthebasicservicesforwhichtheCFBsupplementaryservicehasalreadybeenactivated.Inthiscase,usersshallnotbespecificallyinformedofthedeactivation.Theproceduresofclause5.2.2.1forinformingtheserveduserapply.SIST EN 300 199 V1.2.1:2004

ETSIETSIEN300199V1.2.1(2001-06)11WhensubscriptionappliesonaperISDNnumberbasisandmorethanoneISDNnumberisallocatedtotheaccess,then:-theservedusershallalsosupplytheISDNnumberforwhichthedeactivationoftheCFBsupplementaryserviceshallapply,or;-asaserviceprovideroption,theservedusercan,ifsubscribedto,indicatethatthedeactivationoftheCFBsupplementaryserviceshallapplyforallISDNnumbersforwhichtheCFBsupplementaryserviceissubscribedto.Whensubscriptionappliesforthewholeaccess,oronlyoneISDNnumberisallocatedtotheaccess,theserveduserneednotprovideanISDNnumbertoidentifytheserveduser.IftheserveduserincludesanISDNnumberallocatedtothataccess,orindicatesthatthedeactivationoftheCFBsupplementaryserviceshallapplytoallISDNnumbers(ifthisfunctionalityisofferedbytheserviceproviderandsubscribedtobytheserveduser)thentheISDNnumber,ortheindicationofallISDNnumbers,shal
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