ISO_IEC_22535_2009E.pdf

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 Tlcommunications 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 the typefaces which are embedded are licensed to and installed on the computer performing the editing.In downloading this file,parties accept therein the responsibility of not infringing Adobes licensing policy.The ISO Central Secretariat accepts no liability in this area.Adobe is a trademark of Adobe Systems Incorporated.Details of the software products used to create this PDF file can be found in the General Info relative to the file;the PDF-creation parameters were optimized for printing.Every care has been taken to ensure that the file is suitable for use by ISO member bodies.In the unlikely event that a problem relating to it is found,please inform the Central Secretariat at the address given below.COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2009 All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright office Case postale 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 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 5.2 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 6.3.2 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 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 establishment 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 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 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,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 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 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.ISO 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