Table of Contents
3CompletionofCallstoBusySubscribers(CCBS)
3.1Introduction
3.1.1Scope
3.1.2References
3.1.3Termsanddefinitions
3.1.4Abbreviations
3.2Description
3.2.1Generaldescription
3.2.2Specificterminology
3.2.3Qualificationontheapplicabilityto
telecommunicationservices
3.3Operationalrequirements
3.3.1Provision/withdrawal
3.3.2Requirementsontheoriginatingnetwork
3.3.3Requirementsontheterminatingnetwork
3.3.4Requirementsonthetransitnetwork
3.4Codingrequirements
3.4.1Introduction
3.4.2Codingrequirements
3.4.3ASN.1module
3.5Signallingrequirements
3.5.1Activation/deactivation/registration
3.5.2Erasure
3.5.3Invocationandoperation
3.5.4UseofTCandSCCP
3.5.5Dialogue
3.6Interactionwithothersupplementaryservices
3.6.1CallWaiting(CW)
3.6.2Calltransferservices
3.6.3ConnectedLineIdentificationPresentation
(COLP)
3.6.4ConnectedLineIdentificationRestriction
(COLR)
3.6.5CallingLineIdentificationPresentation
(CLIP)
3.6.6CallingLineIdentificationRestriction
(CLIR)
3.6.7ClosedUserGroup(CUG)
3.6.8ConferenceCalling(CONF)
3.6.9Direct-Dialling-In(DDI)
3.6.10Calldiversionservices
3.6.11LineHunting
3.6.12Three-PartyService(3PTY)
3.6.13User-to-UserSignalling(UUS)
3.6.14MultipleSubscriberNumber(MSN)
3.6.15CallHold(HOLD)
3.6.16AdviceofCharge(AOC)
3.6.17Sub-addressing(SUB)
3.6.18TerminalPortability(TP)
3.6.19CompletionofCallstoBusySubscriber(CCBS)
3.6.20MaliciousCallIdentification(MCID)
3.6.21ReverseCharging(REV)
3.6.22Multi-levelprocedenceandpreemption(MLPP)
3.6.23PrivateNumberingPlan(PNP)
3.6.24InternationalTelecommunicationCharge
Card(ITCC)
3.6.25GlobalVirtualNetworkService(GVNS)
3.7Interactionwithothernetworks
3.7.1InterworkingwithanISUPnetworkwithoutan
ISUPthatfullysupportstheCCBScapability
3.7.2InterworkingwithanetworkwithoutCCBS-
ASEcapability
3.7.3InterworkingwithanetworkwithoutSCCP/TC
capability
3.7.4Interworkingwithanintermediatenetwork
without
3.7.5InterworkingwithpSTNwithanalogue
subscribersusingtheCCBSservice
3.7.6InterworkingwithPSTNuser
3.7.7Proceduresforinterworkingwithprivate
ISDNs
3.8Signallingflows
3.8.1Normalcall-Bbusyindicationsentto
thecallinguser
3.8.2Normalcall-SuccessfulCCBSrequest
followedbyasuccessfulCCBScallset-up
3.8.3UnsuccessfulCCBSrequest,terminal
activated
3.8.4UnsuccessfulCCBSrequest,networkdestination
3.8.5SuccessfulCCBSrequestfollowedbyan
unsuccessfulCCBScallset-up
3.8.6BidleatCCBSrequestfromA
3.8.7AbusywhenBbecomesfree
3.9Parametervalues
3.9.1Timersintheoriginatinglocalexchange
3.9.2Timersinthedestinationlocalexchange
3.9.3Interworkingtimers
3.10Dynamicdescription Abstract
Permits a calling user, when a destination is busy, to be advised when the busy destination is free and allows the service provider to reinitiate the call if the caller requires this.
