1、 Standard ECMA-299 2nd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Single Step Call Transfer Supplementary Service Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - UR
2、L: http:/www.ecma.ch - Internet: helpdeskecma.ch . Standard ECMA-299 2nd Edition - December 2001 Standardizing Information and Communication Systems Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Single Step Call Transfer Supplementary Service (S
3、SCT-SD) Phone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.ch IW Ecma-299.doc 14-01-02 10,35 . Brief History This Standard is one of a series of ECMA Standards defining services and signalling procedures applicable to Private Integrated Services Network
4、s (PISNs). The series uses the ISDN concepts as developed by ITU-T and conforms to the framework of International Standards for Open Systems Interconnection as defined by ISO/IEC. This Standard specifies the Single Step Call Transfer (SSCT) supplementary service. This Standard is based upon the prac
5、tical experience of ECMA member companies and the results of their active and continuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI and other international and national standardization bodies. It represents a pragmatic and widely based consensus. There is currently no equivalent service
6、specified by ITU-T or ETSI for public ISDN. This ECMA Standard is technically aligned with International Standard ISO/IEC 19460 published by ISO/IEC in May 2001. Adopted as 2nd Edition of Standard ECMA-299 by the General Assembly in December 2001. . - i - Table of contents 1 Scope 1 2 Conformance 1
7、3 References (normative) 1 4 Definitions 2 4.1 External definitions 2 4.2 Additional network feature (ANF) 2 4.3 Original Call, Original Connection 2 4.4 New Call, New Connection 2 4.5 User A, Transferring User 3 4.6 User B, Transferred User 3 4.7 User C, Transferred-To User 3 5 List of acronyms 3 6
8、 SS-SSCT stage 1 specification 3 6.1 Description 3 6.1.1 General description 3 6.1.2 Qualifications on applicability to telecommunication services 3 6.2 Procedure 3 6.2.1 Provision/withdrawal 3 6.2.2 Normal procedures 3 6.2.3 Exceptional procedures 4 6.3 Interaction with other supplementary services
9、 and ANFs 4 6.3.1 Calling Line Identification Presentation (SS-CLIP) 4 6.3.2 Connected Line Identification Presentation (SS-COLP) 4 6.3.3 Calling/Connected Line Identification Restriction (SS-CLIR) 4 6.3.4 Calling Name Identification Presentation (SS-CNIP) 4 6.3.5 Calling Name Identification Restric
10、tion (SS-CNIR) 4 6.3.6 Connected Name Identification Presentation (SS-CONP) 4 6.3.7 Completion of Call to Busy Subscriber (SS-CCBS) 4 6.3.8 Completion of Call on No Reply (SS-CCNR) 4 6.3.9 Call Transfer (SS-CT) 4 6.3.10 Call Forwarding Unconditional (SS-CFU) 4 6.3.11 Call Forwarding Busy (SS-CFB) 4
11、6.3.12 Call Forwarding No Reply (SS-CFNR) 5 6.3.13 Call Deflection (SS-CD) 5 6.3.14 Path Replacement (ANF-PR) 5 6.3.15 Call Offer (SS-CO) 5 6.3.16 Call Intrusion (SS-CI) 5 6.3.17 Do not Disturb (SS-DND) 5 - ii - 6.3.18 Do not Disturb Override (SS-DNDO) 5 6.3.19 Advice of Charge (SS-AOC) 5 6.3.20 Rec
12、all (SS-RE) 6 6.3.21 Call Interception (ANF-CINT) 6 6.3.22 Transit Counter (ANF-TC) 6 6.3.23 Route Restriction Class (ANF-RRC) 6 6.3.24 Message Waiting Indication (SS-MWI) 6 6.3.25 Wireless Terminal Location Registration (SS-WTLR) 6 6.3.26 Wireless Terminal Incoming Call (ANF-WTMI) 6 6.3.27 Wireless
13、 Terminal Outgoing Call (ANF-WTMO) 6 6.3.28 Wireless Terminal Authentication of a CTM User (SS-WTAT) 6 6.3.29 Wireless Terminal Authentication of the PISN (SS-WTAN) 6 6.3.30 Private User Mobility Incoming Call (ANF-PUMI) 6 6.3.31 Private User Mobility Outgoing Call (ANF-PUMO) 6 6.3.32 Private User M
14、obility Registration (SS-PUMR) 6 6.3.33 Common Information (ANF-CMN) 7 6.3.34 Call Priority Interruption (Protection) (SS-CPI(P) 7 6.4 Interworking considerations 7 6.4.1 User B and/or User C in another network 7 6.4.2 User A in another network 7 6.5 Overall SDL 8 7 SS-SSCT stage 2 specification 9 7
15、.1 Functional model 9 7.1.1 Functional model description 9 7.1.2 Description of functional entities 10 7.1.3 Relationship of functional model to Basic Call functional model 10 7.2 Information flows 11 7.2.1 Definition of information flows 11 7.2.2 Examples of information flow sequences 14 7.3 Functi
16、onal Entity actions 18 7.3.1 Functional Entity actions of FE1 18 7.3.2 Functional Entity actions of FE2 18 7.3.3 Functional Entity actions of FE3 18 7.3.4 Functional Entity actions of FE4 19 7.3.5 Functional Entity actions of FE5 19 7.3.6 Functional Entity actions of FE6 19 7.3.7 Functional Entity a
17、ctions of FE7 19 7.4 Functional Entity behaviour 20 7.4.1 Behaviour of FE1 20 7.4.2 Behaviour of FE2 21 7.4.3 Behaviour of FE3 22 7.4.4 Behaviour of FE4 24 7.4.5 Behaviour of FE5 25 7.4.6 Behaviour of FE6 26 7.4.7 Behaviour of FE7 27 - iii - 7.5 Allocation of functional entities to physical location
18、s 28 Annex A - Difference between Single Step Call Transfer and Call Transfer by Rerouting 29 - iv - . 1 Scope This Standard specifies the Supplementary Service (SS) Single Step Call Transfer (SSCT), which is applicable to various basic services supported by Private Integrated Services Networks (PIS
19、N). Basic services are specified in ECMA-142. SS-SSCT is a supplementary service that enables an SSCT user, user A, to transform an existing call between user A and user B into a new call between user B and a user C whereby user A does not have a call established with user C prior to call transfer.
20、Supplementary service specifications are produced in three stages, according to the method described in ETS 300 387. This Standard contains the stage 1 and stage 2 specifications of SS-SSCT. The stage 1 specification (clause 6) specifies the general feature principles and capabilities. The stage 2 s
21、pecification (clause 7) identifies the Functional Entities involved in the supplementary service and the information flows between them. 2 Conformance In order to conform to this Standard, a stage 3 standard shall specify signalling protocols and equipment behaviour that are capable of being used in
22、 a PISN which supports the supplementary service specified in this Standard. This means that, to claim conformance, a stage 3 standard is required to be adequate for the support of those aspects of clause 6 (stage 1) and clause 7 (stage 2) which are relevant to the interface or equipment to which th
23、e stage 3 standard applies. 3 References (normative) The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the pos
24、sibility 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 Standards, the number of the appropriate ISO/IEC International Standard is given in brackets after the ECMA reference. ECMA-133 Priv
25、ate Integrated Services Network (PISN) - Reference Configuration for PISN Exchanges (PINX) (International Standard ISO/IEC 11579-1) ECMA-142 Private Integrated Services Network (PISN) - Circuit Mode 64kbit/s Bearer Services - Service Description, Functional Capabilities and Information Flows (Intern
26、ational Standard ISO/IEC 11574) ECMA-148 Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Identification Supplementary Services (International Standard ISO/IEC 14136) ECMA-155 Private Integrated Services Networks - Addressing (International Standar
27、d ISO/IEC 11571) ECMA-163 Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Name Identification Supplementary Services (International Standard ISO/IEC 13864) ECMA-177 Private Integrated Services Network (PISN) - Specification, Functional Model and I
28、nformation Flows - Call Transfer Supplementary Service (International Standard ISO/IEC 13865) ECMA-178 Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Transfer Supplementary Service (International Standard ISO/IEC 13869) ETS 300 387 Private Telecommunication Ne
29、twork (PTN); Method for the specification of basic and supplementary services (1994) ITU-T Rec. I.112 Vocabulary of terms for ISDN (1993) - 2 - ITU-T Rec. I.210 Principles of telecommunication services supported by an ISDN and the means to describe them (1993) ITU-T Rec. Z.100 Specification and desc
30、ription language (1999) 4 Definitions For the purposes of this Standard the following definitions apply. 4.1 External definitions This Standard uses the following terms defined in other documents: Basic service (ITU-T Rec. I.210) Call (Basic call) (ECMA-142) PISN Number (ECMA-155) Private Integrated
31、 Services Network (PISN) (ECMA-133) Private Integrated services Network eXchange (PINX) (ECMA-133) 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 Entities (FE) defined in EC
32、MA-142: Call Control (CC) Call Control Agent (CCA) This Standard refers to the following basic call inter-FE relationships defined in ECMA-142: r1 r2 r3 This Standard refers to the following basic call information flows defined in ECMA-142: SETUP request/indication SETUP response/confirm RELEASE req
33、uest/indication REPORT request/indication INFORMATION request/indication This Standard refers to the following service elements defined for basic call control in ECMA-142: Call History 4.2 Additional network feature (ANF) A capability provided by a PISN, not generally directly to a user, over and ab
34、ove that of the Basic call. 4.3 Original Call, Original Connection The call established between user A and user B. 4.4 New Call, New Connection The new call established between user B and user C. - 3 - 4.5 User A, Transferring User The served user, i.e. the user requesting Single Step Call Transfer.
35、 4.6 User B, Transferred User The other user in user As original call. 4.7 User C, Transferred-To User The user to whom the call is transferred to. 5 List of acronyms ANF Additional Network Feature CC Call Control (Functional Entity) CCA Call Control Agent (Functional Entity) FE Functional Entity FE
36、A Functional Entity Action ISDN Integrated Services Digital Network PINX Private Integrated services Network eXchange PISN Private Integrated Services Network SDL Specification and Description Language SS Supplementary Service SS-SSCT Supplementary Service Single Step Call Transfer TE Terminal Equip
37、ment 6 SS-SSCT stage 1 specification 6.1 Description 6.1.1 General description SS-SSCT is a service which enables a served user (user A) to transfer an active call (with user B) to a user (user C) which has no call established either to user A or to user B. The active call can either be an incoming
38、call to user A or an outgoing call from user A. On successful completion of SS-SSCT user B and user C can communicate with each other and user A will no longer be involved in a call with user B or user C. 6.1.2 Qualifications on applicability to telecommunication services SS-SSCT is applicable to al
39、l basic services defined in ECMA-142. 6.2 Procedure 6.2.1 Provision/withdrawal SS-SSCT shall be generally available to all PISN users with the ability to invoke it. 6.2.2 Normal procedures 6.2.2.1 Activation, deactivation and interrogation Not applicable. 6.2.2.2 Invocation and operation User A, hav
40、ing an active call with user B, may invoke SS-SSCT to transfer the active call to a user (user C) which has no call established either to user A or to user B. The Original call can either be an incoming call to user A or an outgoing call from user A. If, after invoking SS-SSCT, the number of the tra
41、nsferred-to user C supplied by user A is not complete, the transferred user B is requested to complete the number of the transferred-to user C. - 4 - It shall not be necessary to place the Original call on hold prior to invocation of SS-SSCT, although the call may be held. The result of successful S
42、S-SSCT shall be a new call between the transferred user B and the transferred-to user C. Both users B and C may be informed of the transfer, and the name and the number of the other user if available and not subject to restriction. User A is no longer involved in the communication. User A may decide
43、 when the original connection shall be released: either upon the new connection starting ringing or upon being through connected. 6.2.3 Exceptional procedures 6.2.3.1 Activation, deactivation, and interrogation Not applicable. 6.2.3.2 Invocation and operation SS-SSCT shall be rejected if the interco
44、nnection of user B and user C is not permitted. If the new call fails or if SS-SSCT is rejected user A shall be informed and the Original call between user A and user B shall be unaffected. Failure of the new call also includes inter-digit timeout due to user B failing to complete the number of user
45、 C in a timely manner. 6.3 Interaction with other supplementary services and ANFs Interactions with other supplementary services and ANFs for which PISN standards were available at the time of publication of this Standard are specified below. 6.3.1 Calling Line Identification Presentation (SS-CLIP)
46、No interaction. 6.3.2 Connected Line Identification Presentation (SS-COLP) No interaction. 6.3.3 Calling/Connected Line Identification Restriction (SS-CLIR) User Bs restriction requirements from the original call shall be used to restrict the presentation of user Bs number to user C in a transferred
47、 call. 6.3.4 Calling Name Identification Presentation (SS-CNIP) No interaction. 6.3.5 Calling Name Identification Restriction (SS-CNIR) User Bs restriction requirements from the original call shall be used to restrict the presentation of user Bs name to user C in a transferred call. 6.3.6 Connected
48、Name Identification Presentation (SS-CONP) No interaction. 6.3.7 Completion of Call to Busy Subscriber (SS-CCBS) No interaction. 6.3.8 Completion of Call on No Reply (SS-CCNR) No interaction. 6.3.9 Call Transfer (SS-CT) SS-SSCT shall not be initiated during SS-CT. SS-CT shall not be initiated during
49、 SS-SSCT. 6.3.10 Call Forwarding Unconditional (SS-CFU) The new call can be subject of call forwarding unconditional. 6.3.11 Call Forwarding Busy (SS-CFB) The new call can be subject of call forwarding busy. - 5 - 6.3.12 Call Forwarding No Reply (SS-CFNR) The new call can be subject of call forwarding on no reply. 6.3.13 Call Deflection (SS-CD) The new call can be subject of call deflection. 6.3.14 Path Replacement (ANF-PR) No interaction. NOTE 1 Path Replacement may be invoked as a direct consequence of performing single step call transfer.
