ETSI EN 301 134 V1.1.1 (1998-10)

Integrated Services Digital Network (ISDN); Completion of Calls on No Reply (CCNR) supplementary service; Service description

DEN/NA-010027

Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilna storitev: dokončanje klicanja, ko ni odziva (CCNR) – Opis storitve

General Information

• Status: Published
• Publication Date: 11-Oct-1998
• Technical Committee: NA 1 - User Interfaces, Services and Charging
• Current Stage: 12 - Completion
• Due Date: 23-Oct-1998
• Completion Date: 12-Oct-1998
• Ref Project: SIST EN 301 134 V1.1.1:2003 - Integrated Services Digital Network (ISDN); Completion of Calls on No Reply (CCNR) supplementary service; Service description

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VWRULWHYIntegrated Services Digital Network (ISDN); Completion of Calls on No Reply (CCNR) supplementary service; Service description33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 134 Version 1.1.1SIST EN 301 134 V1.1.1:2003en01-december-2003SIST EN 301 134 V1.1.1:2003SLOVENSKI
STANDARD



SIST EN 301 134 V1.1.1:2003



EN 301 134 V1.1.1 (1998-10)European Standard (Telecommunications series)Integrated Services Digital Network (ISDN);Completion of Calls on No Reply (CCNR)supplementary service;Service descriptionSIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)2ReferenceDEN/NA-010027 (ai000ico.PDF)KeywordsISDN, stage 1, supplementary service, CCNRETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail]://www.etsi.orgCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1998.All rights reserved.SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)3ContentsIntellectual Property Rights.5Foreword.51Scope.62References.62.1Normative references.72.2Informative references.73Definitions and abbreviations.73.1Definitions.73.2Abbreviations.84Description.95Procedures.95.1Provision and withdrawal.95.2Normal procedures.105.2.1Activation, deactivation and registration.105.2.1.1Activation.105.2.1.2Deactivation.105.2.1.3Registration.115.2.2Erasure.115.2.3Invocation and operation.115.2.4Interrogation.125.3Exceptional procedures.125.3.1Activation, deactivation and registration.125.3.1.1Activation.125.3.1.2Deactivation.125.3.1.3Registration.135.3.2Erasure.135.3.3Invocation and operation.135.3.3.1Exceptional situation at destination B's side.135.3.3.2Exceptional situation at user A's side.135.3.3.3Network congestion.145.3.4Interrogation.146Intercommunication considerations.146.1Interworking with non-ISDNs.146.2Interworking with private ISDNs.147Interaction with other supplementary services.157.1Advice of charge services.157.1.1Advice of charge at call set-up.157.1.2Advice of charge during the call.157.1.3Advice of charge at the end of a call.157.2Call waiting.157.3Call hold.157.4Explicit call transfer.157.5Number identification services.167.5.1Calling line identification presentation.167.5.2Calling line identification restriction.167.5.3Connected line identification presentation.167.5.4Connected line identification restriction.167.6Closed user group.167.7Completion of calls services.167.7.1Completion of calls to busy subscriber.167.7.2Completion of calls on no reply.177.8Conference services.17SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)47.8.1Conference call, add-on.177.8.2Meet-me conference.177.9Direct dialling in.177.10Diversion services.177.10.1Call forwarding unconditional.177.10.2Call forwarding busy.187.10.3Call forwarding no reply.187.10.4Call deflection.197.10.5Selective call forwarding.197.11Freephone.197.12Malicious call identification.197.13Multiple subscriber number.197.14Subaddressing.197.15Terminal portability.207.16Three party.207.17User-to-user signalling.207.18Outgoing call barring.207.18.1Outgoing call barring: fixed.207.18.2Outgoing call barring: user controlled.207.19Message waiting indication.20Annex A (normative):Determination of the existence of compatible terminals.21History.22SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)5Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.fr/ipr or http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical Committee NetworkAspect (NA).In accordance with CCITT Recommendation I.130 [1], the following three level structure is used to describe thesupplementary telecommunications services as provided by European public telecommunications operators under thepan-European Integrated Services Digital Network (ISDN):-Stage 1: is an overall service description, from the user's standpoint;-Stage 2 identifies the functional capabilities and information flows needed to support the service described instage 1; and-Stage 3 defines the signalling system protocols and switching functions needed to implement the servicedescribed in stage 1.The present document details the stage 1 aspects (overall service description) for the Completion of Calls on No Reply(CCNR) supplementary service. The stage 3 aspects are detailed in EN 301 065-1 (1998) and EN 300 356-20 (1998).National transposition datesDate of adoption of this EN:9 October 1998Date of latest announcement of this EN (doa):31 January 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 July 1999Date of withdrawal of any conflicting National Standard (dow):31 July 1999SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)61ScopeThe present document defines the stage one of the Completion of Calls on No Reply (CCNR) supplementary service forthe pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunicationsoperators. Stage one is an overall service description from the user's point of view(see CCITT Recommendation I.130 [1]), but does not deal with the details of the human interface itself.The present document defines the interworking requirements of private ISDNs with the public ISDN.In addition, the present document specifies the base functionality where the service is provided to the user via a privateISDN.The present document does not specify the additional requirements where the service is provided to the user via atelecommunications network that is not an ISDN but does include interworking requirements of other networks with thepublic ISDN.Interactions with supplementary services not listed in clause 7 are outside the scope of the present document.Charging principles are outside the scope of the present document.The CCNR supplementary service enables user A, encountering a destination B which does not answer the call(No Reply), to have the call completed without having to make a new call attempt when the destination B becomes notbusy after having initiated an activity.The CCNR supplementary service is applicable to all circuit-switched telecommunications services with the followingexceptions:a)
call 2 of the videotelephony teleservice (see ETS 300 264 [8]);b)
call 2 of the audiographic conference teleservice (see ETS 300 675 [10]);c)
call 2 and subsequent calls of videoconference teleservice (see ETS 300 678 [11]);d)
all other circuit-switched telecommunication services requiring the use of more than one B-channel.The present document is applicable to the stage two and stage three standards for the ISDN CCNR supplementaryservice. The terms "stage two" and "stage three" are also defined in CCITT Recommendation I.130 [1]. Where the textindicates the status of a requirement (i.e. as strict command or prohibition, as authorization leaving freedom, or as acapability or possibility), this shall be reflected in the text of the relevant stage two and stage three standards.Furthermore, conformance to the present document is met by conforming to the stage three standard with the field ofapplication appropriate to the equipment being implemented. Therefore, no method of testing is provided for the presentdocument.2ReferencesReferences may be made to:a)specific versions of publications (identified by date of publication, edition number, version number, etc.), inwhich case, subsequent revisions to the referenced document do not apply; orb)all versions up to and including the identified version (identified by "up to and including" before the versionidentity); orc)all versions subsequent to and including the identified version (identified by "onwards" following the versionidentity); ord)publications without mention of a specific version, in which case the latest version applies.A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)72.1Normative references[1]CCITT Recommendation I.130 (1988): "Method for the characterization of telecommunicationservices supported by an ISDN and network capabilities of an ISDN".[2]ITU-T Recommendation I.112 (1993): "Vocabulary of terms for ISDNs".[3]ITU-T Recommendation I.210 (1993): "Principles of telecommunication services supported by anISDN and the means to describe them".[4]ITU-T Recommendation E.164 (1997): "The international public telecommunication numberingplan".[5]CCITT Recommendation Q.9 (1988): "Vocabulary of switching and signalling terms".[6]ITU-T Recommendation I.221 (1993): "Common specific characteristics of services".[7]ETS 300 345: "Integrated Services Digital Network (ISDN); Interworking between public ISDNsand private ISDNs for the provision of telecommunication services; General aspects".2.2Informative references[8]ETS 300 264: "Integrated Services Digital Network (ISDN); Videotelephony teleservice; Servicedescription".[9]ETS 300 357: "Integrated Services Digital Network (ISDN); Completion of Calls to BusySubscriber (CCBS) supplementary service; Service description".[10]ETS 300 675: "Integrated Services Digital Network (ISDN); Audiographic conference teleservice;Service description".[11]ETS 300 678: "Integrated Services Digital Network (ISDN); Videoconference teleservice; Servicedescription".3Definitions and abbreviations3.1DefinitionsFor the purposes of the present document the following definitions apply:Integrated Services Digital Network (ISDN): see ITU-T Recommendation I.112 [2], subclause 2.3, definition 308.service; telecommunications service: see ITU-T Recommendation I.112 [2], subclause 2.2, definition 201.supplementary service: see ITU-T Recommendation I.210 [3], subclause 2.4.ISDN number: a number conforming to the numbering plan and structure specified inITU-T Recommendation E.164 [4].busy: see ITU-T Recommendation I.221 [6], clause 3.user A: the user who originated the call and to whom the CCNR supplementary service is provided.destination B: the entity addressed in the original call.basic call procedures: the procedures by which a call (as an instance of a telecommunications service) is establishedand terminated.SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)8retention timer: this timer specifies the amount of time the network retains all of the information supplied by the callinguser if the call is terminated while destination B is being informed of the call. Although this timer is optional for thebasic call procedures it is needed for the operation of the CCNR supplementary service. The minimum value of the timershall be 15 seconds.CCNR service duration timer: the maximum time the CCNR supplementary service will remain activated for user Awithin the network. The value of this timer shall be a minimum of 60 minutes and a maximum of 180 minutes.CCNR recall timer: the maximum time the network will wait for user A to respond to a CCNR recall. The value of thistimer shall be a minimum of 10 seconds and a maximum of 20 seconds.destination B idle guard timer: the time the network will wait after destination B has become not busy, after havinginitiated an activity before informing user A. The value of this timer shall be a maximum of 15 seconds.CCNR busy: any one of the following conditions will cause user A to be considered as CCNR busy:-maximum number of calls reached at user A;-no B-channels available at user A;-CCNR recall pending on user A.CCNR call: a call generated by the network from user A to destination B resulting from user A's acceptance of a CCNRrecall.CCNR recall: an indication informing user A that the network is ready to initiate a CCNR call to destination B and thatthe network is awaiting a response to this indication.suspended CCNR request: a CCNR request which cannot be served even if destination B is not busy after havinginitiated an activity, because user A is busy or CCNR busy.service provider: the entity which offers the CCNR supplementary service.subaddress: see ITU-T Recommendation E.164 [4], subclause 11.2.compatible terminal: a terminal which can support the bearer service or teleservice requested for the original call todestination B and which can accept calls to the ISDN number and subaddress identifying the called user in the originalcall to destination B.basic access: see CCITT Recommendation Q.9 [5], clause 1, definition 1551.primary rate access: see CCITT Recommendation Q.9 [5], clause 1, definition 1552.CCNR request: an instance of an activation of the CCNR supplementary service which is held in a queue pending thecorrect conditions for the CCNR supplementary service to be completed.activity: answering an incoming call or originating an outgoing call or clearing of an established call or clearing of anoutgoing call.3.2AbbreviationsFor the purposes of the present document the following abbreviations apply:CCBSCompletion of Calls to Busy SubscriberCCNRCompletion of Calls on No ReplyISDNIntegrated Services Digital NetworkSIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)94DescriptionThe CCNR supplementary service enables user A, encountering a destination B which does not answer the call(No Reply), to have the call completed without having to make a new call attempt when the destination B becomes notbusy after having initiated an activity.When user A encounters a destination B which does not answer the call (No Reply), user A can request the CCNRsupplementary service.When user A requests the CCNR supplementary service, the network will monitor for destination B becoming not busyafter having initiated an activity.When destination B becomes not busy (i.e. access resources, e.g. at least one B-channel, are not busy) after havinginitiated an activity, then the network will wait a short time (as defined by the destination B idle guard timer) in order toallow the resources to be re-used for originating a call. If the resources are not re-used by destination B within this time,then the network will automatically recall user A.When user A accepts the CCNR recall, then the network will automatically generate a CCNR call to destination B.The CCNR supplementary service shall be available to users who are connected to the network via a basic access or aprimary rate access.NOTE:A supplementary service provided to destination B which prevents the registration of CCNR requests isoutside the scope of the present document.5Procedures5.1Provision and withdrawalThe CCNR supplementary service shall be provided to user A after prior arrangement with the service provider or shallbe generally available.The CCNR supplementary service shall be withdrawn by the service provider upon request of the subscriber or forservice provider reasons.As a service provider option, the CCNR supplementary service can be offered with a subscription option which shallapply to the whole access of user A. The subscription option is detailed in table 1.Table 1: Subscription optionSubscription optionValuesRecall mode-Global, i.e. CCNR recall offered to all terminals on theaccess.-Specific, i.e. CCNR recall offered to the terminal thathas activated the CCNR supplementary service.If the subscription option is not offered, one of the two values shall be chosen by the service provider.SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)105.2Normal procedures5.2.1Activation, deactivation and registration5.2.1.1ActivationWhen the network encounters a destination B which does not answer the call (No Reply) and the CCNR supplementaryservice can be requested against this destination B, the network shall retain call information. User A can activate theCCNR supplementary service during the time, the called user is being informed of the call and after the call isterminated, but before the retention timer expires.NOTE 1:Some restrictions on activation of the CCNR supplementary service may exist due to technical constraints,e.g. when numbers have been ported or translated.If destination B's network supports the CCNR supplementary service, then upon receipt of a request for the activation ofthe CCNR supplementary service the network shall stop informing destination B of the call and shall register the CCNRrequest. User A shall be informed that the activation was successful. User A can then originate calls and receive calls asnormal.Multiple requests against destination B shall be queued.When the activation of the CCNR supplementary service is accepted the CCNR service duration timer shall be started.The value of this timer shall be a minimum of 60 minutes and a maximum of 180 minutes. The network shall monitordestination B for becoming not busy after having initiated an activity.User A can have a limited number of CCNR requests outstanding. This limit shall apply in general for all users and itsvalue shall be a network provider option with a maximum value of 5. The requests can be to different destinations, orcan be to the same destination B with different service requirements (e.g. bearer service and teleservice requirements),or as a network option, the same service requirements.Destination B can have a limited number of incoming CCNR requests outstanding. This limit shall apply in general forall users and its value shall be a destination network option with a maximum value of 5.As a further destination network option, the size of the destination B CCNR queue can be reduced for individual users.The reduced size can have zero length.NOTE 2:Reducing the queue length allows a service provider to balance the interaction between the CCNRsupplementary service and other supplementary services (e.g. the call waiting supplementary service andthe freephone supplementary service).NOTE 3:As a consequence of the queue having zero length, the CCNR supplementary service will be unavailableto users calling destination B.5.2.1.2DeactivationUser A can send any of the following deactivation requests:a)deactivate all outstanding CCNR requests; orb)deactivate a specific CCNR request. This request shall contain enough information to correlate with the initialactivation.Upon successful deactivation, the corresponding CCNR request shall be discarded.User A shall be informed that the deactivation is successful. If a specific CCNR request is deactivated, the network shallindicate which specific CCNR request has been deactivated.If the value of the subscription option "recall mode" is "specific" then the user can deactivate only those outstandingCCNR requests made from that terminal.If the value of the subscription option "recall mode" is "global", then from any of user A's terminals, user A candeactivate any outstanding CCNR request stored for that user.SIST EN 301 134 V1.1.1:2003



ETSIEN 301 134 V1.1.1 (1998-10)115.2.1.3RegistrationNot applicable.5.2.2ErasureNot applicable.5.2.3Invocation and operationWhen destination B becomes not busy after having initiated an activity, then the destination B CCNR queue shall beprocessed, provided that an entry in the destination B CCNR queue is not currently being processed. Entries shall not beprocessed in parallel.The first request which is not suspended shall be selected and the network shall reserve on destination B's interface theresources (e.g. a B-channel) which are necessary to complete the CCNR call. Destination B can use the reserved accessresources or other free re
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