ISO_IEC_17343_2007E.pdf

Reference numberISO/IEC 17343:2007(E)ISO/IEC 2007 INTERNATIONAL STANDARD ISO/IEC17343Second edition2007-11-15Information technology Telecommunications and information exchange between systems Corporate telecommunication networks Signalling interworking between QSIG and SIP Basic services Technologies de linformation Tlcommunications et change dinformation entre systmes Rseaux de tlcommunications dentreprise Signalisation dinterfonctionnement entre QSIG et SIP Services de base ISO/IEC 17343:2007(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 2007 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 2007 All rights reserved ISO/IEC 17343:2007(E)ISO/IEC 2007 All rights reserved iiiContents Page Foreword.iv Introduction.v 1 Scope.1 2 Conformance.2 3 Normative references.2 4 Terms and definitions.3 5 Abbreviated terms.3 6 Background and Architecture.4 7 General Requirements.6 8 Message Mapping Requirements.7 8.1 Message Validation and Handling of Protocol Errors.7 8.2 Call Establishment from QSIG to SIP.8 8.3 Call Establishment from SIP to QSIG.12 8.4 Call Clearing and Call Failure.16 8.5 Request to Change Media Characteristics.19 9 Number Mapping.19 9.1 Mapping from QSIG to SIP.20 9.2 Mapping from SIP to QSIG.21 10 Requirements for Support of Basic Services.23 10.1 Derivation of QSIG Bearer Capability Information Element.23 10.2 Derivation of Media Type in SDP.23 11 Security Considerations.24 11.1 General.24 11.2 Calls from QSIG to Invalid or Restricted Numbers.24 11.3 Abuse of SIP Response Code.24 11.4 Use of the To Header URI.24 11.5 Use of the From Header URI.25 11.6 Abuse of Early Media.25 11.7 Protection from Denial-of-Service Attacks.25 Annex A(normative)Implementation Conformance Statement(ICS)proforma.26 Annex B(informative)Example Message Sequences.34 ISO/IEC 17343:2007(E)iv ISO/IEC 2007 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 17343 was prepared by Ecma International(as ECMA-339)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 17343:2004),which has been technically revised.ISO/IEC 17343:2007(E)ISO/IEC 2007 All rights reserved vIntroduction This International Standard is one of a series of Standards defining the interworking