1、Standard ECMA-1852nd Edition - June 1997Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chPrivate Integrated Services Network(PISN) -Specification, Functional Model andInformation Flows -Call Complet
2、ion SupplementaryServices.Standard ECMA-1852nd Edition - June 1997Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chIW E-185ii.doc 14-08-97 09,24Private Integrated Services Network(PISN) -Specificati
3、on, Functional Model andInformation Flows -Call Completion SupplementaryServices(CCSD).Brief HistoryThis Standard is one of a series of ECMA Standards defining services and signalling protocols applicable to Private IntegratedServices Networks (PISNs). The series uses ISDN concepts as developed by I
4、TU-T and conforms to the framework ofInternational Standards for Open Systems Interconnection as defined by ISO/IEC. It has been produced under ITSTC workitem M-IT-05 2.2.3 and under ETSI work items DE/ECMA-00007 and RE/ECMA-00129.This particular Standard specifies the Call Completion supplementary
5、services: Call Completion to Busy Subscriber (SS-CCBS) Call Completion on No Reply (SS-CCNR).This Standard is based upon the practical experience of ECMA member companies and the results of their active andcontinuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI and other international and
6、national standardizationbodies. It represents a pragmatic and widely based consensus.Compared to the 1st Edition of Standard ECMA-185 (published by ECMA in December 1992), this 2nd Edition incorporateschanges in order to achieve complete alignment with International Standard ISO/IEC 13866:1995(E) pu
7、blished by ISO/IEC inNovember 1995.Adopted as 2nd Edition of Standard ECMA-185 by the General Assembly of June 1997.,- i -Table of contents1 Scope 12 Conformance 13 References (normative) 14 Definitions 24.1 External definitions 24.2 Other definitions 34.2.1 Additional network feature 34.2.2 Busy 34
8、.2.3 Call, basic call 34.2.4 Call completion 34.2.5 Free 34.2.6 Path reservation 34.2.7 Recall timer 34.2.8 Retention timer 34.2.9 SS-CC recall 34.2.10 SS-CC service duration timer 34.2.11 User A 34.2.12 User B 35 Acronyms 36 SS-CCBS stage 1 specification 46.1 Description 46.1.1 General description
9、46.1.2 Qualifications on applicability to telecommunication services 46.2 Procedures 46.2.1 Provision/Withdrawal 46.2.2 Normal procedures 56.2.3 Exceptional Procedures 66.3 Interactions with other supplementary services 86.3.1 Calling Line Identification Presentation (SS-CLIP) 86.3.2 Connected Line
10、Identification Presentation (SS-COLP) 86.3.3 Calling/Connected Line Identification Restriction (SS-CLIR) 86.3.4 Calling Name Identification Presentation (SS-CNIP) 86.3.5 Connected Name Identification Presentation (SS-CONP) 86.3.6 Calling/Connected Name Identification Restriction (SS-CNIR) 86.3.7 Com
11、pletion of Calls on No Reply (SS-CCNR) 86.3.8 Call Transfer (SS-CT) 86.3.9 Call Forwarding Unconditional (SS-CFU) 86.3.10 Call Forwarding Busy (SS-CFB) 9- ii -6.3.11 Call Forwarding on No Reply (SS-CFNR) 96.3.12 Path Replacement (ANF-PR) 96.4 Interworking considerations 96.5 SS-CCBS overall SDL 97 S
12、S-CCNR stage 1 description 127.1 Description 127.1.1 General description 127.1.2 Qualifications on applicability to telecommunication services 127.2 Procedures 127.2.1 Provision/Withdrawal 127.2.2 Normal Procedures 127.2.3 Exceptional procedures 137.3 Interaction with other supplementary services 14
13、7.3.1 Calling Line Identification Presentation (SS-CLIP) 147.3.2 Connected Line Identification Presentation (SS-COLP) 147.3.3 Calling/Connected Line Identification Restriction (SS-CLIR) 147.3.4 Calling Name Identification Presentation (SS-CNIP) 147.3.5 Connected Name Identification Presentation (SS-
14、CONP) 147.3.6 Calling/Connected Name Identification Restriction (SS-CNIR) 147.3.7 Completion of Calls to Busy Subscribers (SS-CCBS) 157.3.8 Call Transfer (SS-CT) 157.3.9 Call Forwarding Unconditional (SS-CFU) 157.3.10 Call Forwarding Busy (SS-CFB) 157.3.11 Call Forwarding on No Reply (SS-CFNR) 157.3
15、.12 Path Replacement (ANF-PR) 157.4 Interworking considerations 157.5 SS-CCNR Overall SDL 168 SS-CC stage 2 specification 178.1 Functional model 178.1.1 Functional model description 178.1.2 Description of the functional entities 178.1.3 Relationship to basic call functional model 178.2 Information f
16、lows 188.2.1 Definition of information flows 188.2.2 Relationship of information flows to Basic Call information flows 258.2.3 Examples of information flow sequences 278.3 Functional entity actions 458.3.1 Functional entity actions of FE1 458.3.2 Functional entity actions of FE2 458.3.3 Functional e
17、ntity actions of FE3 478.3.4 Functional entity actions of FE4 48- iii -8.4 Functional entity Behaviour 488.4.1 Behaviour of FE1 488.4.2 Behaviour of FE2 518.4.3 Behaviour of FE3 558.4.4 Behaviour of FE4 578.5 Allocation of functional entities to physical locations 588.6 Interworking considerations 5
18、8Annex A - Bibliography 59- iv -.1ScopeThis Standard, specifies supplementary services Call Completion (SS-CC), which are applicable to various basicservices supported by Private Integrated Services Network (PISN). Basic services are specified in ECMA-142.SS-CC consists of two Supplementary services
19、: the Completion of Calls to Busy Subscribers supplementary service(SS-CCBS) and the Completion of Calls on No Reply supplementary service (SS-CCNR). SS-CCBS allowscompletion of a call to a subscriber that was unsuccessful because of a busy condition and SS-CCNR allowscompletion of a call to a subsc
20、riber that was unsuccessful because the subscriber, although alerted, did not answer.Supplementary service specifications are produced in three stages, according to the method described in ETS 300 387.This Standard specifies the stage 1 and stage 2 specifications of SS-CC. The stage 1 specifications
21、 (clauses 6 and 7)specify the supplementary services as seen by the users of PISNs. The stage 2 specification (clause 8) specifies thefunctional entities involved in the supplementary services and the information flows between them.2 ConformanceIn order to conform to this Standard, a stage 3 standar
22、d shall specify signalling protocols and equipment Behaviourthat are capable of being used in a PISN which supports the supplementary services specified in this Standard. Thismeans that, to claim conformance a stage 3 standard is required to be adequate for the support of those aspects of thestage 1
23、 and stage 2 clauses which are relevant to the interface or equipment to which the stage 3 standard applies. Thestage 1 and stage 2 clauses which a stage 3 standard for the Completion of Calls to Busy Subscribers (CCBS)supplementary service shall support are clauses 6 and 8 respectively. The stage 1
24、 and stage 2 clauses which a stage 3standard for the Completion of Calls on No Reply (CCNR) supplementary service shall support are clauses 7 and 8respectively.3 References (normative)The following standards contain provisions which, through reference in this text, constitute provision of this Stand
25、ard.All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate thepossibility of applying the most recent editions of the standards indicated below.In the case of references to ECMA Standards that are aligned with ISO/IEC International Stand
26、ards, the number of theappropriate ISO/IEC International Standard is given in brackets after the ECMA reference.ECMA-142 Private Integrated Services Network - Circuit-mode 64 kbit/s Bearer Services - ServiceDescription, Functional Capabilities and Information Flows (International StandardISO/IEC 115
27、74)ISO/IEC 11579-1 Information technology - Telecommunications and information exchange between systems -Private Integrated Services Network - Part 1: Reference configuration for PISN Exchanges(PINX)ETS 300 387 Private Telecommunication Network (PTN); Method for the specification of basic andsupplem
28、entary services (1994)ITU-T Rec. I.112 Vocabulary of terms for ISDNs (1993)ITU-T Rec. I.210 Principles of telecommunication services supported by an ISDN and the means to describe them(1993)ITU-T Rec. I.221 Common specific characteristics of services (1993)ITU-T Rec. Z.100 Specification and descript
29、ion language (1993)- 2 -4 DefinitionsFor the purposes of this Standard, the following definitions apply.4.1 External definitionsThis Standard uses the following terms defined in other documents: Basic Service (ITU-T Rec. I.210) Private Integrated Services Network (PISN) (ISO/IEC 11579-1) Private Int
30、egrated Services Network Exchange (PINX) (ISO/IEC 11579-1) Service (ITU-T Rec. I.112) Signalling (ITU-T Rec. I.112) Supplementary Service (ITU-T Rec. I.210) User (ECMA-142)This Standard refers to the following basic call functional entity (FEs) defined in ECMA-142: Call Control (CC) Call Control Age
31、nt (CCA)This Standard refers to the following basic call inter-FE relationships defined in ECMA-142: r1 r2 r3This Standard refers to the following basic call information flows defined in ECMA-142: r1_setup request/indication/response/confirmation r1_setup_reject request/indication r1_report request/
32、indication r1_disconnect request/indication r2_setup request/indication/response/confirmation r2_report request/indication r2_release request/indication r3_setup request/indication/response/confirmation r3_setup_reject request/indication r3_report request/indicationThis Standard refers to the follow
33、ing basic call information flow elements defined in ECMA-142: Connection Type (CT) Destination Number (DN) Destination Subaddress (DS) Originating Number (ON) Originating Subaddress (OS)- 3 -4.2 Other definitions4.2.1 Additional network featureA capability, over and above that of a basic service, pr
34、ovided by a PISN, but not directly to a User.4.2.2 BusyA property of a User for whom either a “network determined user busy” or “user determined user busy” condition(see clause 3.1 of ITU-T Rec. I.221) exists.4.2.3 Call, basic callAn instance of the use of a basic service.4.2.4 Call completionThe su
35、ccessful presentation of a previously unsuccessful Call to a destination user (User B) which occurs whenthe call has entered an alerting phase or has been answered.4.2.5 FreeA property of a User who can accept any attempt by the PISN to present a call to that User (i.e. allow the call toreach the al
36、erting or answered state).4.2.6 Path reservationThe reservation of resources prior to SS-CC Recall in order that a connection path through the PISN is availablewhen User A accepts the SS-CC Recall.NOTEPath Reservation does not guarantee that User B will be free when User A accepts the SS-CC Recall.4
37、.2.7 Recall timerThis timer specifies the length of time the network shall wait for a response from user A to a CC Recall.4.2.8 Retention timerThis timer specifies the period of time the network retains the originating call information after a valid callattempt is released.4.2.9 SS-CC recallAn indic
38、ation informing User A that User B is no longer busy (in the case of SS-CCBS) or has just completed aperiod of activity (in the case of SS-CCNR). Acceptance of this indication by User A will cause the call to becompleted by the PISN.4.2.10 SS-CC service duration timerThis timer specifies the length
39、of time that the service shall be active within the network.4.2.11 User AThe specific User that originated the call and requested the supplementary service.4.2.12 User BThe User that was initially addressed in the original call set up.5 AcronymsANF Additional Network FeatureCC Call Control (function
40、al entity)CCA Call Control Agent (functional entity)CCBS Completion of Calls to Busy SubscribersCCI Call Control IdentifierCCNR Completion of Calls on No ReplyCD Call Completion De-registered- 4 -CR Cancellation ReasonCT Connection TypeDN Destination NumberFC Failure CauseFE Functional EntityFEA Fun
41、ctional Entity ActionISDN Integrated Services Digital NetworkMT Monitor TypeNDUB Network Determined User BusyON Originating NumberPINX Private Integrated Services Network ExchangePISN Private Integrated Services NetworkRC Reject CauseRL Request ListRM Request MaintainedRVC Reservation CapabilitySDL
42、Specification and Description LanguageSI Status IndicatorSS-CC Supplementary Service Call CompletionNOTEThis is a generic term, used to describe aspects common to both SS-CCBS and SS-CCNR.SS-CCBS Supplementary Service Completion of Calls to Busy SubscribersSS-CCNR Supplementary Service Completion of
43、 Calls on No ReplyTE Terminal EquipmentUDUB User Determined User Busy6 SS-CCBS stage 1 specification6.1 Description6.1.1 General descriptionCompletion of Calls to Busy Subscribers (SS-CCBS) is a supplementary service which is offered to a callingUser A. On encountering a busy called User B, it allow
44、s User A to request that the PISN monitors User B andnotifies User A when User B becomes free. On response by User A to that notification, the PISN shall attempt tocomplete the call to User B.6.1.2 Qualifications on applicability to telecommunication servicesThis supplementary service is applicable
45、to all basic services defined in ECMA-142.6.2 Procedures6.2.1 Provision/WithdrawalSS-CCBS may be provided after pre-arrangement with the service provider (by means of service profile control),or may be available generally to all Users. SS-CCBS may be withdrawn on request of the User or foradministra
46、tive reasons.- 5 -The subscription parameters and values offered by a PISN shall be an implementation matter. A PISN may offermore or less parameters and values than those specified below.Possible subscription options are summarized in table 1.Table 1 - SS-CCBS Subscription parametersSubscription op
47、tion Values:Recall mode SS-CC Recall offered to all compatible terminals(note) SS-CC Recall offered to the terminal which hasinvoked SS-CCBSNOTEIf the user has more than one compatible terminal (e.g., passive bus arrangement), this option will result in SS-CC Recall being offered simultaneously to a
48、ll those terminals, thereby allowing acceptance by any one of thoseterminals.6.2.2 Normal procedures6.2.2.1 Activation/deactivation/registration/InterrogationSS-CCBS is permanently activated. No information needs to be registered with the PISN for thissupplementary service, and therefore interrogati
49、on is not applicable.6.2.2.2 Invocation and operationWhen a call from User A fails because the destination User, User B, is busy, the PISN shall retain the callinformation provided by User A, as described in 9.2.1 of ECMA-142, for a period during which User A shallbe able to request SS-CCBS. On receipt of a request for SS-CCBS during that period, the PISN shall checkwhether it is possible to initiate the service, and if so shall send an acknowledgment to User A, startmonitoring User B and start the SS-CCBS Service Duration Timer. The acknowledgment means tha
