ETSI EN 301 133 V1.1.1 (1998-10)

Integrated Services Digital Network (ISDN); Selective Call Forwarding (SCF) supplementary services (unconditional, busy and no reply); Service description

DEN/NA-020008

Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilne storitve podaje selektivnih klicev (brezpogojna, v primeru zasedenosti, ko ni odziva) – Opis storitve

General Information

• Status: Published
• Publication Date: 26-Oct-1998
• Technical Committee: NA 2 - Numbering, Addressing, Routeing & Interworking
• Current Stage: 12 - Completion
• Due Date: 13-Nov-1998
• Completion Date: 27-Oct-1998
• Ref Project: SIST EN 301 133 V1.1.1:2003 - Integrated Services Digital Network (ISDN); Selective Call Forwarding (SCF) supplementary services (unconditional, busy and no reply); Service description

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilne storitve podaje selektivnih klicev (brezpogojna, v primeru zasedenosti, ko ni odziva) – Opis storitveIntegrated Services Digital Network (ISDN); Selective Call Forwarding (SCF) supplementary services (unconditional, busy and no reply); Service description33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 133 Version 1.1.1SIST EN 301 133 V1.1.1:2003en01-december-2003SIST EN 301 133 V1.1.1:2003SLOVENSKI
STANDARD



SIST EN 301 133 V1.1.1:2003



EN 301 133 V1.1.1 (1998-10)European Standard (Telecommunications series)Integrated Services Digital Network (ISDN);Selective Call Forwarding (SCF) supplementary services(unconditional, busy and no reply);Service descriptionSIST EN 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)2ReferenceDEN/NA-020008 (aho00ico.PDF)KeywordsISDN, stage 1, supplementary service, SCFETSIPostal 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 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)3ContentsIntellectual Property Rights.5Foreword.51Scope.62References.62.1Normative references.62.2Informative references.73Definitions and abbreviations.73.1Definitions.73.2Abbreviations.84Description.85Procedures.85.1Provision and withdrawal.85.2Normal procedures.95.2.1Activation, deactivation and registration.95.2.1.1Activation.95.2.1.2Deactivation.95.2.1.3Registration.105.2.2Erasure.105.2.3Invocation and operation.105.2.4Interrogation.105.3Exceptional procedures.115.3.1Activation, deactivation and registration.115.3.1.1Activation.115.3.1.2Deactivation.115.3.1.3Registration.115.3.2Erasure.115.3.3Invocation and operation.125.3.4Interrogation.126Intercommunication considerations.126.1Interworking with non-ISDN.126.2Interworking with private ISDNs.127Interaction with other supplementary services.127.1Advice of charge services.127.2Call waiting.127.3Call hold.127.4Explicit call transfer.137.5Number identification services.137.5.1Calling line identification presentation.137.5.2Calling line identification restriction.137.5.3Connected line identification presentation.137.5.4Connected line identification restriction.137.6Closed user group.137.7Call completion services.137.7.1Completion of calls to busy subscriber.137.7.2Completion of calls on no reply.137.8Conference services.147.8.1Conference call, add-on.147.8.2Meet-me conference.147.9Direct dialling in.147.10Diversion services.147.10.1Call forwarding unconditional.147.10.2Call forwarding busy.14SIST EN 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)47.10.3Call forwarding no reply.147.10.4Call deflection.147.10.5Selective call forwarding.157.11Freephone.157.12Malicious call identification.157.13Multiple subscriber number.157.14Subaddressing.157.15Terminal portability.157.16Three party.157.17User-to-user signalling.157.18Outgoing call barring.167.18.1Outgoing call barring: fixed.167.18.2Outgoing call barring: user controlled.167.19Message waiting indication.168Interaction with other services.168.1Universal Access Number (UAN).168.2Virtual card calling.168.3Premium rate.178.4Televoting.178.5Remote control.17History.18SIST EN 301 133 V1.1.1:2003



ETSIEN 301 133 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.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 NetworkAspects (NA).The following three level structure is used to describe the supplementary telecommunications services:- 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.National transposition datesDate of adoption of this EN: 30 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 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)61ScopeThe present document defines the stage one of the Selective Call Forwarding (SCF) supplementary service for thepan-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, but does not deal with the details ofthe 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.Charging principles are outside the scope of the present document.Interaction with supplementary services not listed in clauses 7 and 8 are outside the scope of the present document.The present document deals with the selection mechanisms of the SCF supplementary service. For details of themechanisms by which calls are forwarded, refer to the service descriptions of the call forwarding supplementary services(see ETS 300 200 [5], ETS 300 199 [6], and ETS 300 201 [7]).The SCF supplementary service enables a served user to specify the forwarding of their incoming calls to a selecteddestination subject to certain conditions or circumstances e.g. the calling line identity of the calling user.The SCF supplementary service is applicable to all circuit-switched telecommunication services.The present document is applicable to the stage two and stage three standards for the ISDN SCF supplementary service.The terms "stage two" and "stage three" are also defined in CCITT Recommendation I.130 [1]. Where the text indicatesthe status of a requirement (i.e. as strict command or prohibition, as authorization leaving freedom, as a capability orpossibility), 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 standards with the field ofapplication appropriate to the equipment being implemented. Therefore, no method of testing is provided for the presentdocument.2 ReferencesReferences 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.2.1Normative references[1]CCITT Recommendation I.130 (1988): "Method for the characterization of telecommunicationservices supported by an ISDN and network capabilities of an ISDN".SIST EN 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)7[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]ETS 300 200: "Integrated Services Digital Network (ISDN); Call Forwarding Unconditional(CFU) supplementary service; Service description".[6]ETS 300 199: "Integrated Services Digital Network (ISDN); Call Forwarding Busy (CFB)supplementary service; Service description".[7]ETS 300 201 including A1: "Integrated Services Digital Network (ISDN); Call Forwarding NoReply (CFNR) supplementary service; Service description".[8]Void.[9]EN 301 134: "Integrated Services Digital Network (ISDN); Completion of Calls on No Reply(CCNR) supplementary service; Service description".2.2Informative references[10]ETS 300 345: "Integrated Services Digital Network (ISDN); Interworking between public ISDNsand private ISDNs for the provision of telecommunication services; General aspects".3Definitions and abbreviations3.1DefinitionsFor the purposes of the present document, the following definitions apply:served user: a called user to whom the SCF supplementary service has been provided.Integrated Services Digital Network (ISDN): see ITU-T Recommendation I.112 [2], subclause 2.3, definition 308.service, telecommunication 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].screening list: a list containing conditions for forwarding, or for not forwarding, of a call.basic access: see ITU-T Recommendation I.112, subclause 2.4, definition 425.partial number: the most significant digit(s) of the ITU-T Recommendation E.164 international, national or localnumber.primary rate access: see ITU-T Recommendation I.112 [2], subclause 2.4, definition 426.explicit forwarding: forward all calls from specified calling number(s).implicit forwarding: forward all calls except from the specified calling number(s).SIST EN 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)83.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:CLICalling Line IdentityISDNIntegrated Services Digital NetworkSCFSelective Call ForwardingUANUniversal Access Number4DescriptionThe SCF supplementary service shall apply to the basic access and to the primary rate access.The present document should be read in conjunction with the standards for the Call Forwarding services.The SCF supplementary service is an incoming call management feature to the defined Call Forwarding supplementaryservices that allows the served user to define one or more screening lists. The number of screening lists available tousers is a service provider option. Each screening list consists of a set of calling numbers. Incoming calls that satisfy theconditions identified by the screening list shall be forwarded to the forwarded-to ISDN number, which is registered onactivation of the SCF supplementary service. The served user's ability to originate calls is unaffected by the SCFsupplementary service.If the incoming call contains two calling party numbers and only one of the numbers is on the screening list, forwardingshall take place if the additional forwarding conditions (if any) are met.As a service provider option, the served user can also specify the forwarding of their incoming calls to destinationsaccording to additional forwarding conditions, e.g.:-time of day, day of week, etc.;-area of call origination.NOTE:The specification of these service provider options is outside the scope of the present document.The served user can have multiple instances of the activation of the SCF supplementary service, i.e. more than onescreening list may be in use. This enables calls to be forwarded to different destinations, according to different criteria inthe screening lists.For each screening list, the served user shall specify whether forwarding shall be done unconditionallysee ETS 300 200 [5], and/or on busy see ETS 300 199 [6], and/or on no reply see ETS 300 201 [7].All parameters specified by the served user in a screening list shall be independent from those specified in the otherscreening lists belonging to the served user.The SCF supplementary service shall operate with complete or partial calling number(s) specified in local, national orinternational format and the selected calling number(s) shall be able to be specified both explicitly (i.e. forward all callsfrom specified calling number(s) and implicitly (i.e. forward all calls except from the specified calling numbers).5Procedures5.1Provision and withdrawalThe SCF supplementary service shall be provided after prior arrangement with the service provider.As a service provider option the service can be offered with the following subscription options giving-the number of screening lists per access / number (range 1 to 15);-the number of entries per screening list (range 1 to 20).SIST EN 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)9The maximum values used are chosen by the network operator from the above ranges.The SCF supplementary service can be subscribed to for all basic services subscribed to by the user, or as a serviceprovider option, the user can identify particular basic service(s) for which the SCF supplementary service shall apply.The SCF supplementary service shall be withdrawn by the service provider upon request of the subscriber or for serviceprovider reasons.NOTE:The relationship of subscription options between SCF and the related Call ForwardingUnconditional / Busy / No Reply standards should be a service provider's decision and are not stated inthe present document.5.2Normal procedures5.2.1Activation, deactivation and registration5.2.1.1ActivationTo activate the SCF supplementary service, the served user shall supply the following information when requesting theactivation of the SCF supplementary service:-the type of forwarding (unconditional, see ETS 300 200 [5], on busy see ETS 300 199 [6], or on no replysee ETS 300 201 [7]) which shall be used;-screening list identification (if the service provider only supports one screening list then this information may beomitted);-depending on the type of forwarding which is being requested, the procedures of subclause 6.2.1.1 ofETS 300 200 [5] (for unconditional forwarding), of ETS 300 199 [6] (for forwarding on busy), or ofETS 300 201 [7] (for forwarding on no reply) shall also apply. The relevant information from these proceduresshall be included in the activation request.Multiple selective call forwarding activations are allowed to forward calls from different Calling Line Identities (CLIs)and/or different basic services, addressed to the served user's number, to different forwarded-to numbers. The serveduser can request a different forwarded-to number for each basic service subscription parameter value to which the userhas subscribed.Verification of the ISDN number of the forwarded-to user can be carried out before accepting the request to activate theSCF supplementary service. This verification can be limited, e.g. a simple check of the ISDN number of theforwarded-to user to see if the ISDN number is within the allowed number range.When the served user's request to activate the SCF supplementary service is accepted, the service provider shall informthe served user. The information shall include the address of the forwarded-to user to whom the served user hasactivated the SCF supplementary service. All affected users shall be informed.5.2.1.2DeactivationThe SCF supplementary service can be deactivated in one of three ways:-the served user can specifically deactivate a particular selective call forwarding activation, whereupon thenetwork shall discard the forwarded-to number. All affected users shall be informed;-the served user can deactivate all selective call forwarding activations for one type of call forwarding in a singleoperation, whereupon the network shall discard the forwarded-to numbers. All affected users shall be informed;-the user can activate selective call forwarding for a specified combination of basic service, screening listidentification and type of selective call forwarding supplementary service (unconditional, busy, no reply) toanother forwarded-to number, thus causing the previous activation of selective call forwarding to be deactivated(i.e. overwritten). All affected users shall be informed.SIST EN 301 133 V1.1.1:2003



ETSIEN 301 133 V1.1.1 (1998-10)105.2.1.3RegistrationRegistration occurs during the provision of the SCF supplementary service. As a service provider option the served usermay be given the option to modify, add or delete entries to the screening list or add or delete the lists. These proceduresare outside the scope of the present document. At this time the status of the list, explicit or implicit shall be stated.Priority of screening lists, if applicable, shall be indicated at registration.NOTE:If an end-user activates two or more lists for the same type of forwarding service and one list is explicitand the other implicit, if one or more CLIs are included in both lists a conflict could result. The lists'priority could be used to resolve this conflict.5.2.2ErasureNot applicable.5.2.3Invocation and operationOnly active screening lists shall be taken into account during call processing. If the SCF supplementary service isactivated and the forwarding conditions are met (e.g. with respect to calling line identity, time of day, day of week, etc.),the call shall be forwarded according to the procedures of the forwarding service specified for the active list(s).Depending on the type of forwarding which is being performed, the procedures of subclause 6.2.3 of ETS 300 200 [5](for unconditional forwarding), of ETS 300 199 [6] (for forwarding on busy), or of ETS 300 201 [7] (for forwarding onno reply) shall also apply.If an incoming call does not fit against any forwarding criteria contained on the active screening list(s) then the call shallbe treated according to the normal basic call procedures.5.2.4InterrogationThe served user can make a request for interrogation towards the network in order to determine the status of the SCFsupplementary service. Interrogation can be requested for the whole access (in the case of forwarding for the wholeaccess), or on a per ISDN number basis.When subscription applies on a per ISDN number basis and more than one ISDN number is allocated to the access, theserved user shall also supply the ISDN number for which the request for interrogation of the SCF supplementary serviceshall apply.When subscription applies for the whole access or only one ISDN number is allocated to the access, the served userneed not provide an ISDN number to identify the served user. If the served user includes an ISDN number allocated tothat access, then the number shall be ignored.In the case of a general request, the user shall indicate whether the user wants to interrogate all screening list(s) or onlythe active screening list(s).In the case of a specific request the user shall indicate the applicable screening list.In the network response to an interrogation request the following information shall be provided:a)in response to a general request the served user, shall be given a list:-of the served user's active screening list(s) (with an indicat
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