1、 Reference number ISO/IEC 15051:2003(E) ISO/IEC 2003INTERNATIONAL STANDARD ISO/IEC 15051 Second edition 2003-04-01Information technology Telecommunications and information exchange between systems Private Integrated Services Network Specification, functional model and information flows Recall supple
2、mentary service Technologies de linformation Tlcommunications et change dinformation entre systmes Rseau priv intgration de services Spcification, modle fonctionnel et flux dinformations Service supplmentaire de rappel ISO/IEC 15051:2003(E) PDF disclaimer This PDF file may contain embedded typefaces
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7、e 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2003 All rights reservedISO/IEC 15051:2003(E) ISO/IEC 2003 All rights reserved iii Contents Foreword v Introduction vi 1 Scope 1 2 Conformance 1 3 Normative
8、 references 1 4 Terms and definitions 1 4.1 External definitions 1 4.2 Other definitions 2 4.2.1 Busy 2 4.2.2 Call, basic call 2 4.2.3 Recall busy 2 4.2.4 Recall busy timer 2 4.2.5 Recall no answer 3 4.2.6 Recall no answer timer 3 4.2.7 Served user 3 4.2.8 Waiting at busy user 3 5 List of acronyms 3
9、 6 SS-RE 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 Procedures 4 6.2.1 Provision/withdrawal 4 6.2.2 Normal procedures 4 6.2.3 Exceptional procedures 4 6.3 Interactions with other supplementary servic
10、es and ANFs 4 6.3.1 Calling line identification presentation (SS-CLIP) 5 6.3.2 Connected line identification presentation (SS-COLP) 5 6.3.3 Calling/connected line identification restriction (SS-CLIR) 5 6.3.4 Calling name identification presentation (SS-CNIP) 5 6.3.5 Connected name identification pre
11、sentation (SS-CONP) 5 6.3.6 Calling/connected name identification restriction (SS-CNIR) 5 6.3.7 Call forwarding unconditional (SS-CFU) and Call deflection immediate (SS-CDI) 5 6.3.8 Call forwarding busy (SS-CFB) 5 6.3.9 Call forwarding no reply (SS-CFNR) and Call deflection from alerting (SS-CDA) 5
12、6.3.10 Do-not-disturb (SS-DND) 5 6.3.11 Do-not-disturb override (SS-DNDO) 5 6.3.12 Call completion to busy subscriber (SS-CCBS) 5 6.3.13 Call completion on no reply (SS-CCNR) 5 6.3.14 Call offer (SS-CO) 5 6.3.15 Call transfer (SS-CT) 5 6.3.16 Path replacement (ANF-PR) 6 6.3.17 Call intrusion (SS-CI)
13、 6 6.3.18 Advice of charge (SS-AOC) 6ISO/IEC 15051:2003(E) iv ISO/IEC 2003 All rights reserved 6.3.19 Call interception (ANF-CINT) 6 6.4 Interworking considerations 6 6.5 Overall SDL 6 7 SS-RE stage 2 specification 8 7.1 Functional model 8 7.1.1 Functional model description 8 7.1.2 Description of fu
14、nctional entities 8 7.1.3 Relationship of functional model to basic call functional model 8 7.2 Information flows 9 7.2.1 Definition of information flows 9 7.2.2 Relationship of information flows to Basic Call information flows 9 7.2.3 Example of information flow sequences 10 7.3 Functional entity a
15、ctions 10 7.3.1 Functional entity actions of FE1 10 7.3.2 Functional entity actions of FE2 10 7.3.3 Functional entity actions of FE3 10 7.3.4 Functional entity actions of FE4 11 7.4 Functional entity behaviour 11 7.4.1 Behaviour of FE1 11 7.4.2 Behaviour of FE2 11 7.4.3 Behaviour of FE3 13 7.4.4 Beh
16、aviour of FE4 13 7.5 Allocation of functional entities to physical equipment 14ISO/IEC 15051:2003(E) ISO/IEC 2003 All rights reserved v Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide
17、standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fiel
18、ds of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted i
19、n accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an Internatio
20、nal Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IE
21、C 15051 was prepared by ECMA (as ECMA-213) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by national bodies of ISO and IEC. This second edition cancels and replaces the first edition (ISO/IEC
22、 15051:1997), which has been technically revised. ISO/IEC 15051:2003(E) vi ISO/IEC 2003 All rights reserved Introduction This International Standard is one of a series of Standards defining services and signalling protocols applicable to Private Integrated Services Networks (PISNs). The series uses
23、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 International Standard specifies the Recall supplementary service. This International Standard is based upon the practical experience of ECMA memb
24、er companies and the results of their active and continuous participation in the work of ISO/IEC JTC 1, ITU-T, ETSI and other international and national standardization bodies. It represents a pragmatic and widely based consensus. ISO/IEC 2003 All rights reserved 1 1S c o p e This International Stan
25、dard specifies supplementary service Recall (SS-RE), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574. SS-RE is a supplementary service which provides for the redirection of a call transferred by the
26、 served user back to the served user if the call is unanswered. SS-RE is only applicable after transfer by join, not after transfer by rerouteing. Service specifications are produced in three stages, according to the method described in ETS 300 387. This International Standard contains the stage 1 a
27、nd stage 2 specifications of SS-RE. The stage 1 specification (clause 6) specifies the supplementary service as seen by users of PISNs. The stage 2 specification (clause 7) identifies the functional entities involved in the supplementary service and the information flows between them. 2 Conformance
28、In order to conform to this International Standard, a Stage 3 standard shall specify signalling protocols and equipment behaviour that are capable of being used in a PISN which supports the supplementary service specified in this International Standard. This means that, to claim conformance, a Stage
29、 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 the Stage 3 standard applies. 3 Normative references ISO/IEC 11574:2000, Information technology - Telecommunications and info
30、rmation exchange between systems - Private Integrated Services Network - Circuit-mode 64 kbit/s bearer services - Service description, functional capabilities and information flows ISO/IEC 11579-1:1994, Information technology - Telecommunications and information exchange between systems - Private in
31、tegrated services network - Part 1: Reference configuration for PISN Exchanges (PINX) ISO/IEC 13865:2003, Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Call Transfer
32、 supplementary service ETS 300 387:1994, Private Telecommunication Network (PTN); Method for the specification of basic and supplementary services ITU-T Rec. I.112:1993, Vocabulary of terms for ISDNs ITU-T Rec. I.210:1993, Principles of telecommunication services supported by an ISDN and the means t
33、o describe them ITU-T Rec. I.221:1993, Common specific characteristics of services ITU-T Rec. Z.100:1999, Specification and description language (SDL) 4 Terms and definitions For the purposes of this document, the following terms and definitions apply. 4.1 External definitions This International Sta
34、ndard uses the following terms defined in other documents: Basic Service (ITU-T Rec. I.210) The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced do
35、cument (including any amendments) applies. INTERNATIONAL STANDARD ISO/IEC 15051:2003(E)Information technology Telecommunications and information exchange between systems Private Integrated Services Network Specification, functional model and information flows Recall supplementary service ISO/IEC 150
36、51:2003(E) 2 ISO/IEC 2003 All rights reserved Connection (ITU-T Rec. I.112) Network Determined User Busy (ITU-T Rec. I.221) Primary Call (ISO/IEC 13865) Private Integrated Services Network (PISN) (ISO/IEC 11579-1) Private Integrated services Network eXchange (PINX) (ISO/IEC 11579-1) Secondary Call (
37、ISO/IEC 13865) Service (ITU-T Rec. I.112) Signalling (ITU-T Rec. I.112) Supplementary Service (ITU-T Rec. I.210) User (ISO/IEC 11574) User A (ISO/IEC 13865) User B (ISO/IEC 13865) User C (ISO/IEC 13865) User Determined User Busy (ITU-T Rec. I.221) This International Standard refers to the following
38、basic call functional entities (FEs) defined in ISO/IEC 11574: Call Control (CC) Call Control Agent (CCA) This International Standard refers to the following basic call inter-FE relationships defined in ISO/IEC 11574: r1 r2 r3 This International Standard refers to the following basic call informatio
39、n flows defined in ISO/IEC 11574: Report request/indication Setup request/indication Setup response/confirmation This International Standard refers to the following basic call information flow elements defined in ISO/IEC 11574: Connected Number (CN) Connected Subaddress (CS) 4.2 Other definitions 4.
40、2.1 Busy A property of a user for whom either a Network Determined User Busy or a User Determined User Busy condition exists. 4.2.2 Call, basic call An instance of the use of a basic service. 4.2.3 Recall busy The redirection of a transferred call back to the served user if the call is waiting at a
41、busy user C and user C remains busy. 4.2.4 Recall busy timer A timer governing the period that a transferred call will wait at a busy user C before Recall busy occurs. The value of this timer is implementation specific.ISO/IEC 15051:2003(E) ISO/IEC 2003 All rights reserved 3 4.2.5 Recall no answer T
42、he redirection of a transferred call back to the served user if user C is being alerted and does not answer. 4.2.6 Recall no answer timer A timer governing the period that a transferred call will alert user C before Recall no answer occurs. The value of this timer is implementation specific. 4.2.7 S
43、erved user A User A that is provided with SS-RE. 4.2.8 Waiting at busy user A call state in which a call is awaiting answer at a user that is busy on another call. NOTE - This can arise, for example, as a result of the use of supplementary service Call Offer (SS-CO) during call establishment. A call
44、 that is waiting on busy can be transferred. 5 List of acronyms ANF Additional Network Feature CC Call Control (functional entity) CCA Call Control Agent (functional entity) CN Connected Number CS Connected Subaddress DC Destination Category FE Functional Entity ISDN Integrated Services Digital Netw
45、ork PINX Private Integrated services Network eXchange PISN Private Integrated Services Network SDL Specification and Description Language SS-RE Supplementary Service Recall TE Terminal Equipment 6 SS-RE stage 1 specification 6.1 Description 6.1.1 General description When the served user has a call e
46、stablished with user B and transfers that call to user C, SS-RE enables user B to be re- connected to the served user either if user C is being alerted and does not reply within a specified period (recall no answer), or if the call is waiting at busy user C and user C remains busy for a specified pe
47、riod (recall busy). An implementation may provide either of these variants or both. NOTE - If the served user fails to respond to the incoming re-directed call, the call may be cleared or subjected to other action which is beyond the scope of this specification. 6.1.2 Qualifications on applicability
48、 to telecommunication services SS-RE is applicable to all basic services defined in ISO/IEC 11574.ISO/IEC 15051:2003(E) 4 ISO/IEC 2003 All rights reserved 6.2 Procedures 6.2.1 Provision/withdrawal SS-RE may be provided after pre-arrangement with the service provider, or may be available generally to
49、 all users. SS-RE may be withdrawn on request of the user or for administrative reasons. The subscription parameters and values offered by a PISN shall be an implementation matter. A PISN may offer more or less parameters and values than those specified below. Table 1 - SS-RE Subscription parameters Subscription option ValueRecall no answer select or de-selectRecall busy select or de-select 6.2.2 Normal procedures 6.2.2.1 Activation/deactivation/registratio
