ISO/IEC INTERNATIONAL STANDARD 17343 Second edition 2007-11-15 Information technology - Telecommunications and information exchange between systems Corporate telecommunication networks : Signalling interworking between QSIG and SIP Basic services Technologies de I'information - Télécommunications et échange d'information entre systemes - Réseaux de telécommunications d'entreprise Signalisation d'interfonctionnement entre QSIG et SIP - Services de base Reference number ISO/IEC 17343:2007(E) IEC @ISO/IEC 2007 IHS under I without license from IHS ISO/IEC 17343:2007(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's 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 Adobe's 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 COPYRIGHTPROTECTEDDOCUMENT ISO/IEC2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's 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 [email protected] Web www.iso.org Published in Switzerland ISO/IEC 2007-All rightsreserved s/1111111001, User=leee, leee ed without license from IHS ISO/IEC 17343:2007(E) Contents Page Foreword. Introduction 1 Scope 2 Conformance 3 Normative references 4 Terms and definitions 5 Abbreviated terms 6 Background and Architecture ... 7 General Requirements .6 8 Message Mapping Requirements... 8.1 Message Validation and Handling of Protocol Errors. 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 .... 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..... 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 .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 URl.. 24 11.5 Use of the From Header URI. 11.6 Abuse of EarlyMedia ... 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 ii ISO/IEC 17343:2007(E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission)formthespecializedsystemforworldwidestandardization.Nationalbodiesthataremembersof 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 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/lEC 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