1、 Reference numberISO/IEC 22535:2009(E)ISO/IEC 2009 INTERNATIONAL STANDARD ISO/IEC22535Third edition2009-04-15Information technology Telecommunications and information exchange between systems Corporate telecommunication networks Tunnelling of QSIG over SIP Technologies de linformation Tlcommunicatio
2、ns et change dinformation entre systmes Rseaux de tlcommunications dentreprise Tunnellisation de QSIG sur SIP ISO/IEC 22535:2009(E)PDF disclaimer This PDF file may contain embedded typefaces.In accordance with Adobes licensing policy,this file may be printed or viewed but shall not be edited unless
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7、o.org Published in Switzerland ii ISO/IEC 2009 All rights reserved ISO/IEC 22535:2009(E)ISO/IEC 2009 All rights reserved iiiContents Page Foreword.iv Introduction.v 1 Scope.1 2 Normative references.1 3 Terms and definitions.2 4 Abbreviated terms.3 5 Background and architecture.3 5.1 Architecture.3 5
8、.2 Basic operation.4 5.3 QSIG connectionless transport.5 5.4 Late availability of SDP parameters at the egress gateway.5 6 Procedures.5 6.1 General.5 6.2 Encapsulation of QSIG messages in SIP messages.5 6.3 QSIG SETUP message handling at an ingress gateway.6 6.3.1 Sending a SIP INVITE request.6 6.3.
9、2 Receipt of responses to the INVITE request.6 6.4 QSIG SETUP message handling at an egress gateway.7 6.4.1 Receiving a SIP INVITE request.7 6.4.2 Rejecting a QSIG message in an INVITE request.8 6.5 Subsequent QSIG messages.8 6.6 Terminating the SIP dialog.8 6.7 QSIG connectionless message handling
10、at an ingress gateway.9 6.7.1 Sending a SIP INVITE request.9 6.7.2 Receipt of responses to the INVITE request.9 6.8 QSIG connectionless message handling at an egress gateway.10 7 Example message sequences.10 7.1 Call establishment.10 7.2 Call clearing.11 7.3 QSIG connectionless message.12 7.4 Call e
11、stablishment with port=0 in first SDP answer.13 7.5 Backwards compatibility with early editions.14 8 Security considerations.16 Annex A(informative)Changes from early editions.17 Bibliography.19 ISO/IEC 22535:2009(E)iv ISO/IEC 2009 All rights reserved Foreword ISO(the International Organization for
12、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 development of International Standards through technical committees established by the respective organiza
13、tion 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,in liaison with ISO and IEC,also take part in the work.In the field of information technology,ISO an
14、d 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 joint technical committee is to prepare International Standards.Draft International Standards adopted by the j
15、oint 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.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.I
16、SO and IEC shall not be held responsible for identifying any or all such patent rights.ISO/IEC 22535 was prepared by Ecma International(as ECMA-355)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 third edition cancels and replaces the second edition(ISO/IEC 22535:2006),which has been technically revised.ISO/IEC 22535:2009(E)ISO/IEC 2009 All rights reserved
