ISO/IEC INTERNATIONAL 22535 STANDARD Third edition 2009-04-15 Information technology - Telecommunications and information exchange between systems Corporate telecommunication networks - Tunnelling of QSiG over SiP Technologies de I'information - Télecommunications et échange d'information entre systemesReseaux de telecommunications d'entreprise - Tunnellisation de QSIG sur SIP Reference number ISO/IEC 22535:2009(E) IEC ISo @ ISO/IEC 2009 Not for Resale ted without license from IHS ISO/IEC22535:2009(E) PDF disclaimer 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 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 fle is suitable for use by IsO member bodies. In COPYRIGHT PROTECTED DOCUMENT @ISO/IEC2009 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 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 copyright@iso.org Web www.iso.org Published in Switzerland @ISO/IEC2009-Allrightsreserved ted without license from IHS Not for Resale ISO/IEC 22535:2009(E) Contents Page Foreword. Introduction 1 Scope 2 Normative references . 3 Terms and definitions . 4 Abbreviated terms .... 5 Background and architecture... 5.1 Architecture... 5.2 Basic operation.... 5.3 QsiG connectionless transport.... 5.4 Late availability of SDP parameters at the egress gateway 6 Procedures 6.1 General. 6.2 Encapsulation of QsIG messages in SIP messages.. 6.3 QSIG SETUP message handling at an ingress gateway.... 6.3.1 Sending a SIP INVITE request ... 6.3.2 Receipt of responses to the INVITE request.. 6.4 QSIG SETUP message handling at an egress gateway.... 6.4.1 Receiving a SIP INVITE request ... 6.4.2 Rejecting a QSIG message in an INVITE request.. 6.5 Subsequent QsIG messages.. .8 6.6 Terminating the SiP dialog ..... 6.7 QsiG connectionless message handling at an ingress gateway ... 6.7.1 Sending a SIP INVITE request ... 6.7.2 Receipt of responses to the INVITE request.... 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 QsiIG connectionless message ..... 12 7.4 Call establishment with port=o in first SDP answer.... ..13 7.5 Backwards compatibility with early editions .... 14 Security considerations. 8 .16 Annex A (informative) Changes from early editions.. 17 Bibliography 19 ili ted withoutlicense from IHS Not for Resale