SIST ETS 300 204:1997

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalno omrežje z integriranimi storitvami (ISDN) - Dopolnilna storitev: brezpogojna preusmeritev klica (CFU) - Funkcijske zmožnosti in informacijski tokoviIntegrated Services Digital Network (ISDN); Call Forwarding Unconditional (CFU) supplementary service; Functional capabilities and information flows33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 204 E13SIST ETS 300 204:1997en01-MDQXDU-19973SIST ETS 300 204:1997SLOVENSKI
STANDARD



SIST ETS 300 204:1997



EUROPEANETS 300 204TELECOMMUNICATIONDecember 1994STANDARDSource: ETSI TC-SPSReference: T/S 22-06,1ICS:33.080Key words:ISDN, supplementary service.Integrated Services Digital Network (ISDN);Call Forwarding Unconditional (CFU) supplementary serviceFunctional capabilities and information flowsETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 92 94 42 00 - Fax: +33 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1994. All rights reserved.SIST ETS 300 204:1997New presentation - see History box



Page 2ETS 300 204: December 1994Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 204:1997



Page 3ETS 300 204: December 1994ContentsForeword.51Scope.72Normative references.73Definitions.84Abbreviations.95Description.96Derivation of the functional model.96.1Functional model description.96.2Description of the FEs.106.3Relationship with a basic service.107Information flows.107.1Information flow diagrams.107.2Definition of individual information flows.137.2.1Relationship ra.137.2.1.1Contents of INFORM2.137.2.1.2Contents of INFORM7.137.2.2Relationship rb.137.2.2.1Contents of INFORM1.137.2.2.2Contents of INFORM6.147.2.3Relationship rc.147.2.3.1Contents of INFORM10 (rerouteing request).147.2.4Relationship rd.157.2.4.1Contents of INFORM3.157.2.5Relationship re.157.2.5.1Contents of INFORM4.157.2.5.2Contents of INFORM6.167.2.6Relationship rf.167.2.6.1Contents of INFORM4.167.2.6.2Contents of INFORM6.167.2.7Relationship rg.177.2.7.1Contents of INFORM5.178SDL diagrams for FEs.178.1FE1.188.2FE2.198.3FE3.238.4FE4.278.5FE5.318.6FE6.328.7FE7.368.8FE8.399Functional Entity Actions (FEAs).409.1FEAs of FE1.409.2FEAs of FE2.409.3FEAs of FE3.409.4FEAs of FE4.40SIST ETS 300 204:1997



Page 4ETS 300 204: December 19949.5FEAs of FE5.419.6FEAs of FE6.419.7FEAs of FE7.419.8FEAs of FE8.4110Allocation of FEs to physical locations.42Annex A (informative):Explanatory model for multiple diversion.43Annex B (normative):Activation, deactivation, registration and interrogation.44B.1Definitions.44B.2Description.44B.3Derivation of the functional model.45B.3.1Functional model description.45B.3.2Description of the FEs.45B.3.3Relationship with a basic service.46B.3.4Relationship of the user's Service Control Model (SCM) to the CFU supplementaryservice FE model.46B.4Information flows.47B.4.1Information flow diagram for the SSC.47B.4.2Definition of individual information flows.48B.4.2.1Relationship rx.48B.4.2.1.1Contents of ACTIVATION.48B.4.2.1.2Contents of DEACTIVATION.49B.4.2.2Relationship ry.49B.4.2.2.1Contents of INFORM1.49B.4.2.2.2Contents of INFORM2.50B.4.2.2.3Contents of INTERROGATION.50B.4.2.2.4Contents of NUMBER INTERROGATION.51B.5SDL diagrams for SCEs.51B.5.1SCE1.52B.5.2SCE2.53B.5.3SCE3.56B.6SCE actions.57B.6.1SCE1.57B.6.2SCE2.57B.6.3SCE3.57B.7Allocation of SCEs to physical locations.57History.58SIST ETS 300 204:1997



Page 5ETS 300 204: December 1994ForewordThis European Telecommunication Standard (ETS) has been produced by the Signalling Protocols andSwitching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).In accordance with CCITT Recommendation I.130, the following three level structure is used to describethe supplementary telecommunication services as provided by European public telecommunicationsoperators under the pan-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 servicedescribed in stage 1; and-Stage 3: defines the signalling system protocols and switching functions needed to implement theservice described in stage 1.This ETS details the stage 2 aspects (functional capabilities and information flows) needed to support theCall Forwarding Unconditional (CFU) supplementary service. The stage 1 and stage 3 aspects are detailedin ETS 300 200 (1994) and ETS 300 207-1 (1994), respectively.Proposed transposition datesDate of latest announcement of this ETS (doa):31 March 1995Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 September 1995Date of withdrawal of any conflicting National Standard (dow):30 September 1995SIST ETS 300 204:1997



Page 6ETS 300 204: December 1994Blank pageSIST ETS 300 204:1997



Page 7ETS 300 204: December 19941ScopeThis European Telecommunication Standard (ETS) defines the stage two of the Call ForwardingUnconditional (CFU) supplementary service for the pan-European Integrated Services Digital Network(ISDN) as provided by European public telecommunications operators. Stage two identifies the functionalcapabilities and the information flows needed to support the stage one service description. The stage twodescription also identifies user operations not directly associated with a call (see CCITT RecommendationI.130 [3]).This ETS is specified according to the methodology defined in CCITT Recommendation Q.65 [6].This ETS does not formally describe the relationship between this supplementary service and the basiccall, but where possible this information is included for guidance.In addition this ETS does not specify the requirements where the service is provided to the user via aprivate ISDN. This ETS does not specify the requirements for the allocation of defined Functional Entities(FEs) within a private ISDN; it does, however, define which FEs may be allocated to a private ISDN.This ETS does not specify the additional requirements where the service is provided to the user via atelecommunications network that is not an ISDN.The CFU supplementary service enables a served user to have the network redirect to another user callswhich are addressed to the served user's ISDN number. The CFU supplementary service may operate onall calls, or just those associated with specified basic services. The served user's ability to originate calls isunaffected by the CFU supplementary service. After the CFU supplementary service has been activated,calls are forwarded independent of the status of the served user.The CFU supplementary service is applicable to all circuit-switched telecommunication services.This ETS is applicable to the stage three standards for the ISDN CFU supplementary service. The term"stage three" is also defined in CCITT Recommendation I.130 [3]. Where the text indicates the status of arequirement, 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 three standards.Furthermore, conformance to this ETS 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 providedfor this ETS.2Normative referencesThis ETS incorporates by dated or undated reference, provisions from other publications. These normativereferences are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this ETSonly when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies.[1]CCITT Recommendation E.164 (1991): "Numbering plan for the ISDN era".[2]ITU-T Recommendation I.112 (1993): "Vocabulary of terms for ISDNs".[3]CCITT Recommendation I.130 (1988): "Method for the characterization oftelecommunication services supported by an ISDN and network capabilities of anISDN".[4]ITU-T Recommendation I.210 (1993): "Principles of telecommunication servicessupported by an ISDN and the means to describe them".SIST ETS 300 204:1997



Page 8ETS 300 204: December 1994[5]CCITT Recommendation Q.9 (1988): "Vocabulary of switching and signallingterms".[6]CCITT Recommendation Q.65 (1988): "Stage 2 of the method for thecharacterization of services supported by an ISDN".[7]CCITT Recommendation Q.71 (1988): "ISDN 64 kbit/s circuit mode switchedbearer service".[8]CCITT Recommendation Z.100 (1988): "Specification and Description Language(SDL)".[9]ETS 300 200: "Integrated Services Digital Network (ISDN); Call ForwardingUnconditional (CFU) supplementary service; Service description".3DefinitionsFor the purposes of this ETS, the following definitions apply:address: See CCITT Recommendation E.164 [1], clause 12.basic service: See CCITT Recommendation Q.9 [5], definition 7018.connected number: The ISDN number of the final destination (user C).forwarded-to address: The address to which a call has been forwarded.Forwarded-To Number (FTN): The ISDN number to which a call has been forwarded.forwarded-to user: A user to whom the call is redirected as a result of forwarding.forwarding cause: Parameter which contains the reason for the forwarding, e.g. due to the CallForwarding Busy (CFB) supplementary service, the CFU supplementary service, the Call Forwarding NoReply (CFNR) supplementary service, or the Call Deflection (CD) supplementary service.forwarding indicator: Indicator showing that call has been forwarded and indicating whether thisinformation should be given to calling user.forwarding number: The ISDN number of the served user.Integrated Services Digital Network (ISDN): See ITU-T Recommendation I.112 [2], definition 308.ISDN number: A number conforming to the numbering plan and structure specified in CCITTRecommendation E.164 [1].originally called number: The ISDN number of user B.Presentation Indicator (PI): Indicator showing whether the FTN should be presented to the calling user,as derived from the Connected Line Identification Restriction (COLR) supplementary service of user C.served user: The user to whom the CFU supplementary service is provided.service; telecommunication service: See ITU-T Recommendation I.112 [2], definition 201.supplementary service: See ITU-T Recommendation I.210 [4], subclause 2.4.user A: The calling user in a call which is subject to diversion.user B: The served user when a call (from user A) is subject to the CFU supplementary service.SIST ETS 300 204:1997



Page 9ETS 300 204: December 1994user C: The forwarded-to user in a call which is subject to the CFU supplementary service. In the case ofa call which is subject to multiple diversions, user C is the forwarded-to user with respect to the final callforwarding.4AbbreviationsFor the purposes of this ETS, the following abbreviations apply:CCCall ControlCCACall Control AgentCDCall DeflectionCFBCall Forwarding BusyCFNRCall Forwarding No ReplyCFUCall Forwarding UnconditionalCOLRConnected Line Identification RestrictionFEFunctional EntityFEAFunctional Entity ActionFTNForwarded-To NumberISDNIntegrated Services Digital NetworkLELocal ExchangeNSONotification Subscription OptionPIPresentation IndicatorPTNXPrivate Telecommunication Network eXchangeSCEService Control EntitySCMService Control ModelSDLSpecification and Description LanguageSSCSupplementary Service ControlTETerminal Equipment5DescriptionThe general description of the CFU supplementary service is specified in ETS 300 200 [9], clause 5.6Derivation of the functional model6.1Functional model descriptionThe functional model for the CFU supplementary service is shown in figure 1.
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Page 10ETS 300 204: December 19946.2Description of the FEsThe FEs required by the CFU supplementary service in addition to those of the basic call are as follows:FE1:Calling user's service agent;FE2:Calling user's Service Control Entity (SCE);FE3:Call forwarding execution entity;FE4:Call forwarding detection and control entity;FE5:Served user's service agent;FE6:Interface controlling entity;FE7:Forwarded-to user's SCE;FE8:Forwarded-to user's service agent.6.3Relationship with a basic serviceRelationship with a basic service is shown in figure 2.NOTE:The basic call model is defined in CCITT Recommendation Q.71 [7], § 2.1, with theexception that r1 represents an outgoing call relationship from a Call Control Agent(CCA) and r3 represents an incoming call relationship to a CCA.ÚÄÄÄ¿ ra ÚÄÄÄ¿
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Page 12ETS 300 204: December 1994
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Figure 4: Flows across the public/private network interface at user CSIST ETS 300 204:1997



Page 13ETS 300 204: December 19947.2Definition of individual information flows7.2.1Relationship ra7.2.1.1Contents of INFORM2The content of INFORM2 is shown in table 1.Table 1ParameterAllowed valuereq.indforwarding indicatorM7.2.1.2Contents of INFORM7The content of INFORM7 is shown in table 2.Table 2ParameterAllowed valuereq.indFTNISDN numberM (note)FTN PI- number restrictedM- number not available- number allowedNOTE:Only present if PI = number allowed.7.2.2Relationship rb7.2.2.1Contents of INFORM1The content of INFORM1 is shown in table 3.Table 3ParameterAllowed valuereq.indforwarding indicator includingMNotification Subscription Option (NSO)- No- Yes, without FTN- Yes, with FTNforwarding causeCFUMFTN (note)ONOTE:This option refers to the situation in which the FTN is withheld on the basis of anetwork-provider decision.SIST ETS 300 204:1997



Page 14ETS 300 204: December 19947.2.2.2Contents of INFORM6The content of INFORM6 is shown in table 4.Table 4ParameterAllowed valuereq.indPI- presentation allowedM- presentation not allowed7.2.3Relationship rc7.2.3.1Contents of INFORM10 (rerouteing request)NOTE:All the information necessary to FE3 to launch the forwarded call is included in theINFORM10.The content of INFORM10 is shown in table 5.Table 5ParameterAllowed valuereq.indresp.confcause for forwardingCFUMforwarded-to addressMforwarding indicatorMforwarding numberOrestriction indicator for forwarding numberMtelecommunications service informationMuser-to-user informationOforwarding counterMcalling party subaddressOforwarding invocation resultpositive/negativeMacknowledgementreason for rejection(note)ONOTE:Possible reasons are: "service not subscribed", "service not available", "service notimplemented", "resource unavailable", "invalid FTN", "FTN is operator access", "FTN is specialservice ISDN number", "FTN is served user's ISDN number", "number of diversions exceeded".SIST ETS 300 204:1997



Page 15ETS 300 204: December 19947.2.4Relationship rd7.2.4.1Contents of INFORM3The content of INFORM3 is shown in table 6.NOTE:The sending of INFORM3 depends on the subscription options of the served user. Itcontains all information necessary to identify the served user, e.g. the served user'snumber including all direct dialling in digits.Table 6ParameterAllowed valuereq.indserved user's addressMuser-to-user information (if available)Mforwarding causeCFUMtelecommunications service informationMcalling party address (note 2)- addressO- number restricted- number not availablelast forwarding number (note 3)- ISDN numberM (note 1)- number restricted- number not availablecause for last forwardingM (note 1)originally called number (note 3)- ISDN numberM (note 1)- number restricted- number not availableNOTE 1:Only applicable in case of multiple forwarding.NOTE 2:The calling party address shall be included if required by the calling lineidentification presentation supplementary service, if not restricted.NOTE 3:This ISDN number shall only be included if no restrictions exist.7.2.5Relationship re7.2.5.1Contents of INFORM4The content of INFORM4 is shown in table 7.Table 7ParameterAllowed valuereq.indforwarding causeCFUMforwarding number (note)Mforwarding counterMoriginally called number (note)MNOTE:This ISDN number shall always be transferred in the network together with a"restriction indicator" whose value is set according to the subscription options ofthe user. On boundaries between different networks or to private networks theISDN number need not be passed depending on a network-provider decision.SIST ETS 300 204:1997



Page 16ETS 300 204: December 19947.2.5.2Contents of INFORM6The content of INFORM6 is shown in table 8.Table 8ParameterAllowed valuereq.indPI for FTN- presentation allowedM- presentation not allowed7.2.6Relationship rf7.2.6.1Contents of INFORM4The content of INFORM4 is shown in table 9.Table 9ParameterAllowed valuereq.indforwarding causeCFUMforwarding number (note)Mforwarding counterMoriginally called number (note)MNOTE:This ISDN number shall always be transferred in the network together with a"restriction indicator" whose value is set according to the subscription options ofthe user. On boundaries between different networks or to private networks theISDN number need not be passed depending on a network-provider decision.7.2.6.2Contents of INFORM6The content of INFORM6 is shown in table 10.Table 10ParameterAllowed valuereq.indPI for FTN- presentation allowedM- presentation not allowedSIST ETS 300 204:1997



Page 17ETS 300 204: December 19947.2.7Relationship rg7.2.7.1Contents of INFORM5The content of INFORM5 is shown in table 11.Table 11ParameterAllowed valuereq.indlast forwarding causeMlast forwarding number (note 1)- ISDN numberO- number restricted- number not availableoriginally called number (note 1)- ISDN numberO- number restricted- number not availablecalling party address (note 2)- addressO- number restricted- number not availableNOTE 1:This ISDN number shall only be included if no restrictions exist.NOTE 2:The calling party address shall be included if required by the calling lineidentification presentation supplementary service, if not restricted.8SDL diagrams for FEsAll Specification and Description Language (SDL) diagrams for FEs are described according to CCITTRecommendation Z.100 [8].NOTE:The notes to the figures within this clause refer to a basic call model defined in CCITTRecommendation Q.71 [7] with the exception that r1 represents only an outgoing callrelationship from a CCA and r3 represents an incoming call relationship to a CCA.SIST ETS 300 204:1997



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Page 22ETS 300 204: December 1994Notes to figure 7:NOTE 1:CFU1 and CFU2 break the basic call transition after receiving "SETUP resp.conf" (seefigure 2-9 (sheet 3 of 19) of CCITT Recommendation Q.71 [7]). CFU2 reconnects atthe same point.NOTE 2:CFU3 and CFU4 break the basic call transition after receiving "SETUP resp.conf" (seefigure 2-9 (sheet 4 of 19) of CCITT Recommendation Q.71 [7]). CFU4 reconnects atthe same point.NOTE 3:CFU5 and CFU6 break the basic call transition after receiving "SETUP resp.conf" (seefigure 2-9 (sheet 15 of 19) of CCITT Recommendation Q.71 [7]). CFU6 reconnects atthe same point.NOTE 4:CFU7 and CFU8 break the basic call transition after receiving "SETUP resp.conf" (seefigure 2-9 (sheet 16 of 19) of CCITT Recommendation Q.71 [7]). CFU8 reconnects atthe same point.SIST ETS 300 204:1997



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Page 26ETS 300 204: December 1994Notes to figure 9:NOTE 1:CFU9 and CFU10 break the basic call transition on the "Yes" branch of the decision"Successful?" following the task "Term. Screen. Process attempt
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