1、 ETSI TS 102 393 V1.1.1 (2005-02)Technical Specification Corporate telecommunication Networks (CN);Signalling interworking between QSIG and SIP;Call DiversionETSI ETSI TS 102 393 V1.1.1 (2005-02) 2 Reference DTS/ECMA-00296 Keywords interworking, QSIG, signalling ETSI 650 Route des Lucioles F-06921 S
2、ophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org
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6、 restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETS
7、I for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 102 393 V1.1.1 (2005-02) 3 Contents Intellectual Property Rights5 Foreword.5 Brief history5 1 Scope 6 2 References 6 3 Terms and definition
8、s.7 3.1 External definitions 7 3.2 Other definitions.7 3.2.1 Call diversion7 3.2.2 Call forwarding busy (CFB) .7 3.2.3 Call forwarding no reply (CFNR).7 3.2.4 Call forwarding unconditional (CFU).7 3.2.5 Corporate telecommunication Network (CN).7 3.2.6 Entity A.8 3.2.7 Entity B.8 3.2.8 Entity C.8 3.2
9、.9 Gateway 8 3.2.10 IP network.8 3.2.11 Leg A 8 3.2.12 Leg B 8 3.2.13 Leg C 8 3.2.14 Private Integrated Services Network (PISN) 8 3.2.15 Private Integrated services Network eXchange (PINX) .8 3.2.16 Rerouting entity 8 3.2.17 User A.8 3.2.18 User B .8 3.2.19 User C .9 4 Abbreviations and acronyms9 5
10、Background and architecture for SIP-QSIG interworking .9 6 Call diversion .9 7 Call diversion in QSIG.10 8 Call diversion in SIP 11 9 Diversion interworking.12 9.1 Scenarios for diversion interworking .12 9.2 Mapping of numbers, names and URIs 12 9.3 Derivation of QSIG diversion reasons13 9.3.1 Scen
11、ario A1 13 9.3.2 Scenario B1.13 9.3.3 Scenario C2.14 9.4 Derivation of SIP response codes (scenarios A2 and C1) 14 9.5 Mapping the QSIG diversion counter.14 9.6 Privacy considerations14 9.7 Interworking for scenario A1 .15 9.7.1 Transmitting a SIP INVITE request .15 9.7.2 Receipt of a SIP 1xx or 2xx
12、 response .15 9.7.3 Receipt of a SIP 4xx, 5xx or 6xx response .15 9.8 Interworking for scenario A2 .16 9.8.1 Receipt of a SIP INVITE request16 9.8.2 Receipt of a QSIG divertingLegInformation1 invoke APDU.16 9.8.3 Receipt of a QSIG divertingLegInformation3 invoke APDU.16 ETSI ETSI TS 102 393 V1.1.1 (
13、2005-02) 4 9.8.4 Transmitting a SIP response in which History-Info is allowed 16 9.9 Interworking for scenario B117 9.9.1 Receipt of a SIP 3xx response 17 9.9.2 Receipt of a QSIG DISCONNECT or FACILITY message containing a callRerouteing return result APDU .18 9.9.3 Receipt of a QSIG FACILITY messag
14、e containing a callRerouteing return error APDU .18 9.9.4 Receipt of a QSIG FACILITY message containing a cfnrDivertedLegFailed invoke APDU19 9.10 Interworking for scenario B219 9.10.1 Receipt of a QSIG FACILITY message containing a CallRerouteing invoke APDU19 9.11 Interworking for scenario C119 9.
15、11.1 Receipt of a QSIG SETUP message containing a divertingLegInformation2 invoke APDU.20 9.11.2 Transmitting a QSIG CONNECT message 20 9.12 Interworking for scenario C220 9.12.1 Transmitting a QSIG SETUP message .20 9.12.2 Receipt of a QSIG message containing a divertingLegInformation3 invoke APDU2
16、1 9.12.3 Sending History-Info in a response.21 10 Example message sequences21 10.1 Scenario A121 10.1.1 Successful call - history information in 200 response.22 10.1.2 Successful call - history information in provisional response.23 10.1.3 Failed call24 10.2 Scenario A224 10.2.1 Successful call - CF
17、U or CFB.25 10.2.2 Successful call - CFNR.26 10.3 Scenario B1 26 10.3.1 Successful diversion - CFU or CFB27 10.3.2 Successful diversion - CFNR28 10.3.3 Failure - callRerouting.err received 29 10.3.4 Failure - No answer following CFNR.30 10.4 Scenario B2 31 10.5 Scenario C1 32 10.6 Scenario C2 33 10.
18、7 Scenario A1 followed by B1 34 10.8 Scenario A2 followed by scenario B2 35 10.9 Scenario C1 followed by scenario A1 36 10.10 Scenario C2 followed by scenario A2 37 10.11 Scenario C1 followed by scenario B1 38 10.12 Scenario C2 followed by scenario B2 39 11 Security considerations.39 History 40 ETSI
19、 ETSI TS 102 393 V1.1.1 (2005-02) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETS
20、I SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI I
21、PR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword Th
22、is Technical Specification (TS) has been produced by ECMA on behalf of its members and those of the European Telecommunications Standards Institute (ETSI). Brief history The present document is one of a series of Ecma Standards defining the interworking of services and signalling protocols deployed
23、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 defined by ISO/IEC. The present document specifies interwork
24、ing 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) protocol for creating, modifying, and terminating sessions with one o
25、r 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 Services Networks (PISNs). QSIG is specified in a number of Ecma Standar
26、ds and published also as ISO/IEC International Standards. The present document is based upon the practical experience of Ecma member companies and the results of their active and continuous participation in the work of ISO/IEC JTC1, ITU-T, IETF, ETSI and other international and national standardizat
27、ion bodies. It represents a pragmatic and widely based consensus. ETSI ETSI TS 102 393 V1.1.1 (2005-02) 6 1 Scope The present document specifies signalling interworking between “QSIG“ and the Session Initiation Protocol (SIP) in support of call diversion within corporate telecommunication networks (
28、CN), also known as enterprise 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 spe
29、cified in Ecma Standards, in particular 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 proto
30、col in support of these services 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. Tel
31、ephone calls are considered as 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
32、through a network. The present document 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 requ
33、est retargeting in the SIP network. Signalling 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 the present docu
34、ment. However, the functionality specified in the present document is in principle applicable to such a scenario when deployed in conjunction with other relevant functionality (e.g. number translation, security functions, etc.). The present document is applicable to any interworking unit that can ac
35、t as a gateway between a PISN employing QSIG and a corporate IP network employing SIP. 2 References 1 ISO/IEC 11572: “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Circuit mode bearer services - Inter-exchange signalling
36、procedures and protocol“. (also published by Ecma as Standard ECMA-143). 2 ISO/IEC 11582: “Telecommunications and information exchange between systems - Private Integrated Services Network - Generic functional protocol for the support of supplementary services - Inter-exchange signalling procedures
37、and protocol“. (also published by Ecma as Standard ECMA-165). 3 ISO/IEC 13868: “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Name identification supplementary services“. (also publish
38、ed by Ecma as Standard ECMA-164). 4 ISO/IEC 13872: “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Call Diversion supplementary services“. (also published by Ecma as
39、Standard ECMA-173). 5 ISO/IEC 13873: “Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call Diversion supplementary services“. (also published by Ecma as Standard ECMA-174). 6 ISO/IEC 173
40、43: “Information technology - Telecommunications and information exchange between systems - Corporate telecommunication networks - Signalling interworking between QSIG and SIP - Basic services“. (also published by Ecma as Standard ECMA-339). ETSI ETSI TS 102 393 V1.1.1 (2005-02) 7 7 Ecma Technical R
41、eport TR/86: “Corporate Telecommunication Networks - User Identification in a SIP/QSIG Environment“. 8 IETF RFC 791: “Internet Protocol“. 9 IETF RFC 2119: “ Key words for use in RFCs to Indicate Requirement Levels. 10 IETF RFC 2460: “Internet Protocol, Version 6 (IPv6) Specification“. 11 IETF RFC 32
42、61: “SIP: Session Initiation Protocol“. 12 IETF RFC 3323: “A Privacy Mechanism for the Session Initiation Protocol (SIP)“. 13 IETF RFC 3326: “The Reason Header Field for the Session Initiation Protocol (SIP)“. 14 M. Barnes: “An Extension to the Session Initiation Protocol for Request History Informa
43、tion“, draft-ietf-sipping-history-info-03 (work in progress). 3 Terms and definitions In the present document, the key words “MUST“, “MUST NOT“, “REQUIRED“, “SHALL“, “SHALL NOT“, “SHOULD“, “SHOULD NOT“, “RECOMMENDED“, “MAY“, and “OPTIONAL“ are to be interpreted as described in RFC 2119 9 and indicat
44、e requirement levels for compliant implementations. For the purposes of the present document, the following definitions apply. 3.1 External definitions The definitions in 1 and 11 apply as appropriate. 3.2 Other definitions 3.2.1 Call diversion The act of retargeting a call during call establishment
45、 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 forwarding no reply (CFNR) Call diversion invoked because the targeted user fails to reply within a certain t
46、ime. 3.2.4 Call forwarding unconditional (CFU) Call diversion invoked for reasons other than those leading to CFB or CFNR. 3.2.5 Corporate telecommunication Network (CN) Sets of privately-owned or carrier-provided equipment that are located at geographically dispersed locations and are interconnecte
47、d to provide telecommunication services to a defined group of users. NOTE 1: A CN can comprise a PISN, a private IP network (intranet) or a combination of the two. NOTE 2: Also known as enterprise network. ETSI ETSI TS 102 393 V1.1.1 (2005-02) 8 3.2.6 Entity A The entity that provides information ab
48、out diversion to user A. 3.2.7 Entity B The entity that invokes diversion for a call targeted at user B. 3.2.8 Entity C The entity that provides information about diversion to user C. 3.2.9 Gateway An entity that performs interworking between a PISN using QSIG and an IP network using SIP. 3.2.10 IP
49、network A network, unless otherwise stated a corporate network, offering connectionless packet-mode services based on the Internet Protocol (IP) as the network layer protocol. 3.2.11 Leg A The call segment between entity A and the rerouting entity for a call that undergoes diversion. 3.2.12 Leg B The call segment between the rerouting entity and entity B for a call that undergoes diversion. 3.2.13 Leg C The call segment between the rerouting entity and entity C for a call that undergoes diversion. 3.2.14 Private Integrated Serv
