1、 Reference number ISO/IEC 23915:2005(E) ISO/IEC 2005INTERNATIONAL STANDARD ISO/IEC 23915 First edition 2005-11-01Information technology Telecommunications and information exchange between systems Corporate Telecommunication Networks Signalling Interworking between QSIG and SIP Call Diversion Technol
2、ogies de linformation Tlcommunications et change dinformation entre systmes Rseaux de tlcommunications dentreprise Interaction de signalisation entre QSIG et SIP Dviation dappel ISO/IEC 23915:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing pol
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7、1 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2005 All rights reservedISO/IEC 23915:2005(E) ISO/IEC 2005 All rights reserved iii Contents Page Foreword .v Introductionvi 1 Scope1 2 Normative references1 3 Terms and definitions .2 3.1 External
8、definitions .2 3.2 Other definitions3 3.2.1 Call diversion .3 3.2.2 Call forwarding busy (CFB)3 3.2.3 Call forwarding no reply (CFNR)3 3.2.4 Call forwarding unconditional (CFU).3 3.2.5 Corporate telecommunication Network (CN)3 3.2.6 Entity A.3 3.2.7 Entity B.3 3.2.8 Entity C.3 3.2.9 Gateway3 3.2.10
9、IP network3 3.2.11 Leg A.3 3.2.12 Leg B.3 3.2.13 Leg C.4 3.2.14 Private Integrated Services Network (PISN) .4 3.2.15 Private Integrated services Network eXchange (PINX) .4 3.2.16 Rerouting entity.4 3.2.17 User A.4 3.2.18 User B.4 3.2.19 User C.4 4 Abbreviations and acronyms .4 5 Background and archi
10、tecture for SIP-QSIG interworking.5 6 Call diversion .5 7 Call diversion in QSIG.6 8 Call diversion in SIP7 9 Diversion interworking7 9.1 Scenarios for diversion interworking7 9.2 Mapping of numbers, names and URIs.8 9.3 Derivation of QSIG diversion reasons.8 9.3.1 Scenario A19 9.3.2 Scenario B19 9.
11、3.3 Scenario C29 9.4 Derivation of SIP response codes (scenarios A2 and C1) 9 9.5 Mapping the QSIG diversion counter10 9.6 Privacy considerations.10 9.7 Interworking for scenario A110 9.7.1 Transmitting a SIP INVITE request10 9.7.2 Receipt of a SIP 1xx or 2xx response11 9.7.3 Receipt of a SIP 4xx, 5
12、xx or 6xx response11 9.8 Interworking for scenario A211 9.8.1 Receipt of a SIP INVITE request.12ISO/IEC 23915:2005(E) iv ISO/IEC 2005 All rights reserved9.8.2 Receipt of a QSIG divertingLegInformation1 invoke APDU . 12 9.8.3 Receipt of a QSIG divertingLegInformation3 invoke APDU . 12 9.8.4 Transmitt
13、ing a SIP response in which History-Info is allowed 12 9.9 Interworking for scenario B1. 13 9.9.1 Receipt of a SIP 3xx response. 13 9.9.2 Receipt of a QSIG DISCONNECT or FACILITY message containing a callRerouteing return result APDU. 14 9.9.3 Receipt of a QSIG FACILITY message containing a callRero
14、uteing return error APDU. 14 9.9.4 Receipt of a QSIG FACILITY message containing a cfnrDivertedLegFailed invoke APDU 14 9.10 Interworking for scenario B2. 15 9.10.1 Receipt of a QSIG FACILITY message containing a CallRerouteing invoke APDU. 15 9.11 Interworking for scenario C1. 15 9.11.1 Receipt of
15、a QSIG SETUP message containing a divertingLegInformation2 invoke APDU . 15 9.11.2 Transmitting a QSIG CONNECT message 16 9.12 Interworking for scenario C2. 16 9.12.1 Transmitting a QSIG SETUP message . 16 9.12.2 Receipt of a QSIG message containing a divertingLegInformation3 invoke APDU 17 9.12.3 S
16、ending History-Info in a response 17 10 Example message sequences. 17 10.1 Scenario A1. 18 10.1.1 Successful call history information in 200 response. 18 10.1.2 Successful call history information in provisional response . 19 10.1.3 Failed call. 20 10.2 Scenario A2. 21 10.2.1 Successful call CFU or
17、CFB . 21 10.2.2 Successful call CFNR 22 10.3 Scenario B1. 23 10.3.1 Successful diversion CFU or CFB . 23 10.3.2 Successful diversion CFNR 24 10.3.3 Failure callRerouting.err received 25 10.3.4 Failure No answer following CFNR 26 10.4 Scenario B2. 27 10.5 Scenario C1. 28 10.6 Scenario C2. 29 10.7 Sce
18、nario A1 followed by B1. 30 10.8 Scenario A2 followed by scenario B2. 31 10.9 Scenario C1 followed by scenario A1. 32 10.10 Scenario C2 followed by scenario A2. 33 10.11 Scenario C1 followed by scenario B1. 34 10.12 Scenario C2 followed by scenario B2. 35 11 Security considerations . 35ISO/IEC 23915
19、:2005(E) ISO/IEC 2005 All rights reserved vForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the developmen
20、t 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 fields of mutual interest. Other international organizations, governmental and non-governmental,
21、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 in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joi
22、nt 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 International Standard requires approval by at least 75 % of the national bodies casting a vote. Attent
23、ion 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/IEC 23915 was prepared by Ecma International (as ECMA-360) and was adopted, under a special “fa
24、st- track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by national bodies of ISO and IEC. ISO/IEC 23915:2005(E) vi ISO/IEC 2005 All rights reservedIntroduction This International Standard is one of a series of Standards defining the in
25、terworking of services and signalling protocols deployed in corporate telecommunication networks (CNs) (also known as enterprise networks). The series uses telecommunication concepts as developed by ITU-T and conforms to the framework of International Standards on Open Systems Interconnection as def
26、ined by ISO/IEC. This International Standard specifies interworking between the Session Initiation Protocol (SIP) and QSIG within corporate telecommunication networks (also known as enterprise networks) for calls that undergo diversion. SIP is an Internet application-layer control (signalling) proto
27、col for creating, modifying, and terminating sessions with one or more participants. These sessions include, in particular, telephone calls. QSIG is a signalling protocol for creating, modifying and terminating circuit- switched calls, in particular telephone calls, within Private Integrated Service
28、s Networks (PISNs). QSIG is specified in a number of Standards and published also as ISO/IEC International Standards. This International Standard is based upon the practical experience of member companies and the results of their active and continuous participation in the work of ISO/IEC JTC1, ITU-T
29、, IETF, ETSI and other international and national standardization bodies. It represents a pragmatic and widely based consensus. INTERNATIONAL STANDARD ISO/IEC 23915:2005(E) ISO/IEC 2005 All rights reserved 1 Information technology Telecommunications and information exchange between systems Corporate
30、 Telecommunication Networks Signalling Interworking between QSIG and SIP Call Diversion 1 Scope This document specifies signalling interworking between “QSIG“ and the Session Initiation Protocol (SIP) in support of call diversion within corporate telecommunication networks (CN), also known as enterp
31、rise networks. “QSIG“ is a signalling protocol that operates between Private Integrated services Network eXchanges (PINX) within a Private Integrated Services Network (PISN). A PISN provides circuit-switched basic services and supplementary services to its users. QSIG is specified in Standards, in p
32、articular 1 (call control in support of basic services), 2 (generic functional protocol for the support of supplementary services) and a number of Standards specifying individual supplementary services. Diversion services are specified in 4 and the QSIG signalling protocol in support of these servic
33、es is specified in 5. In particular, this signalling protocol signals information about call diversion to the users involved. SIP is an application layer protocol for establishing, terminating and modifying multimedia sessions. It is typically carried over IP 8, 10. Telephone calls are considered as
34、 a type of multimedia session where just audio is exchanged. SIP is defined in 11. An extension to SIP provides history information 14 that can be used to signal information about the retargeting of a request, in particular a call establishment request, as it is routed through a network. This docume
35、nt specifies signalling interworking for call diversion during the establishment of calls between a PISN employing QSIG and a corporate IP network employing SIP. It covers both the impact on SIP of call diversion in the QSIG network and the impact on QSIG of request retargeting in the SIP network. S
36、ignalling interworking for call diversion operates on top of signalling interworking for basic calls, which is specified in 6. Call diversion interworking between a PISN employing QSIG and a public IP network employing SIP is outside the scope of this specification. However, the functionality specif
37、ied in this specification is in principle applicable to such a scenario when deployed in conjunction with other relevant functionality (e.g., number translation, security functions, etc.). This specification is applicable to any interworking unit that can act as a gateway between a PISN employing QS
38、IG and a corporate IP network employing SIP. 2 Normative references 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 document (including any am
39、endments) applies. 1 International Standard ISO/IEC 11572 “Information technology Telecommunications and information exchange between systems Private Integrated Services Network Circuit mode bearer services Inter- exchange signalling procedures and protocol“ (also published by Ecma as Standard ECMA-
40、143). ISO/IEC 23915:2005(E) 2 ISO/IEC 2005 All rights reserved 2 International Standard ISO/IEC 11582 “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Generic functional protocol for the support of supplementary services -
41、Inter-exchange signalling procedures and protocol“ (also published by Ecma as Standard ECMA-165). 3 International Standard ISO/IEC 13868 “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol -
42、Name identification supplementary services“ (also published by Ecma as Standard ECMA-164). 4 International Standard ISO/IEC 13872 “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and informat
43、ion flows - Call Diversion supplementary services“ (also published by Ecma as Standard ECMA-173). 5 International Standard ISO/IEC 13873 “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol -
44、Call Diversion supplementary services“ (also published by Ecma as Standard ECMA-174). 6 International Standard ISO/IEC 17343 “Information technology - Telecommunications and information exchange between systems - Corporate telecommunication networks - Signalling interworking between QSIG and SIP - B
45、asic services“ (also published by Ecma as Standard ECMA-339). 7 Ecma Technical Report TR/86, “Corporate Telecommunication Networks User Identification in a SIP/QSIG Environment“. 8 J. Postel, “Internet Protocol“, RFC 791. 9 Bradner, S., “Key words for use in RFCs to Indicate Requirement Levels“, BCP
46、 14, RFC 2119. 10 S. Deering, R. Hinden, “Internet Protocol, Version 6 (IPv6)“, RFC 2460. 11 J. Rosenberg, H. Schulzrinne, et al., “SIP: Session initiation protocol“, RFC 3261. 12 J. Peterson, “A Privacy Mechanism for the Session Initiation Protocol (SIP)“, RFC 3323. 13 H. Schulzrinne, D. Oran, G. C
47、amarillo, “The Reason Header field for the Session Initiation Protocol (SIP)“, RFC 3326. 14 M. Barnes “An Extension to the Session Initiation Protocol for Request History Information“, draft-ietf- sipping-history-info-03 (work in progress). 3 Terms and definitions In this document, the key words “MU
48、ST“, “MUST NOT“, “REQUIRED“, “SHALL“, “SHALL NOT“, “SHOULD“, “SHOULD NOT“, “RECOMMENDED“, “MAY“, and “OPTIONAL“ are to be interpreted as described in RFC 2119 9 and indicate requirement levels for compliant implementations. For the purposes of this specification, the following definitions apply. 3.1
49、 External definitions The definitions in 1 and 11 apply as appropriate. ISO/IEC 23915:2005(E) ISO/IEC 2005 All rights reserved 3 3.2 Other definitions 3.2.1 Call diversion the act of retargeting a call during call establishment by changing the user identity that is used as the basis for routing to the destination. 3.2.2 Call forwarding busy (CFB) call diversion invoked because the targeted user is busy. 3.2.3 Call forward
