ISO/IEC INTERNATIONAL STANDARD 21991 First edition 2002-06-15 Information technology - Telecommunications and information exchange between systems Corporate Telecommunication Networks Signalling interworking between QSIG and H.323 Call completion supplementary services Technologies de I'information Télécommunications et échange d'information entre systemes-Réseaux de telécommunications de corps-Travail de signalisation entre QSIG et H.323-Complements de service d'achevement d'appel Reference number ISO/IEC 21991:2002(E) EC @ISO/IEC2002 Not for Resale ISO/IEC 21991:2002(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 downloading 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 ?ISO/IEC2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic 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.ch Web www.iso.ch Printed in Switzerland @ ISO/IEC 2002 - All rights reserved itted without license from IHS Not for Resale ISO/IEC 21991:2002(E) Contents Page Foreword > Introduction vi 1 Scope 1 2 Conformance 1 3 Normative references 1 4 Definitions 2 4.1 External definitions 22 4.2 Other definitions 4.2.1 Entity A 22 4.2.2 Entity B 4.2.3 Gateway 2 4.2.4 IP network 22 4.2.5 Leg A 4.2.6 Scenario A1 2 4.2.7 Scenario A2 2 5 Acronyms 3 6 Service architecture 3 6.1 Service architecture for invocation and operation 3 6.1.1 ISO/EC 13870 service architecture 3 6.1.2 H.450.9 service architecture 4 6.1.3 Scenarios for interworking 4 6.1.4 Selection of the same gateway for all phases 4 6.2 Options :4 7 Protocol interworking - General requirements 5 8 Protocol interworking - Messages and APDUs i5 8.1 Signalling phase 1 - invocation of call completion 5 8.1.1 Scenario A1 5 8.1.2 Scenario A2 6 8.2 Signalling phase 2 - user B available notification 6 8.2.1 Scenario A1 7 8.2.2 Scenario A2 8 8.3 Signalling phase 3 - CC call establishment 9 8.3.1 Scenario A1 9 8.3.2 Scenario A2 9 8.4 Signalling phase 4 - cancellation of SS-CC 9 8.4.1 Scenario A1 10 8.4.2 Scenario A2 10 9 Protocol interworking - content of APDUs 10 9.1 APDU content mapping from QSIG to H.323 11 ili HS unde ense from IHS Not for Resale