ISO/IEC TECHNICAL REPORT TR 21890 First edition 2001-10-01 Information technology Telecommunications and information exchangebetweensystems Interoperation of PiSNs with IP networks Technologies de Il'informationTelécommunications etéchange d'informationentre systemes-InteroperationdePisNavec des réseauxIP Reference number ISO/IEC TR21890:2001(E) ?ISO/IEC2001 national Organization for Standardization Not for Resale ISO/IECTR21890:2001(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 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 suitablefor useby isO memberbodies. In the unlikely event ?ISO/IEC2001 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 inthecountry oftherequester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel. + 4122749 0111 Fax + 41 22 749 09 47 E-mail copyright@iso.ch Web www.iso.ch Printed in Switzerland @ ISO/IEC 2001-All rights reserved itted without license from IHS Not for Resale ISO/IECTR21890:2001(E) Contents Foreword vi Introduction vii 1 Scope 1 2 Normative references 1 3 Definitions 3 3.1 Corporate telecommunication Network (CN) 3 3.2 Internet 33 3.3 Intranet 3.4 Internet Protocol (IP) 3 3.5 IP network 33 3.6 Private Integrated Services Network (PISN) 3.7 Private Integrated services Network eXchange (PINX) 3 3.8 SwitchedCircuitNetwork(SCN) 3 3.9 Tunnelling 3 4 Acronyms 3 5 Introduction 5 5.1 Background 5 5.2 Types of network 6 5.3 Arrangements for interworking of SCNs and IP networks 7 5.4 Arrangements for interconnection of SCN components overIP networks 8 6 General principles of multimedia communication over an IP network 8 6.1 Architecture 9 6.1.1 Media processing and packetization (MPP)functional entity 9 6.1.2 Resource control (RC) functional entity 9 6.1.3 Session control (SC) functional entity 10 6.1.4 SC-redirect (SC-R), SC-proxy (SC-P) and RC-proxy (RC-P) functional entities 10 6.1.5 Admissioncontrol(AC)functionalentities 11 6.1.6 Identityresolution(IR)functionalentity 11 6.1.7 Registrar (RGR) and registrant (RGT) functional entities 11 6.1.8 Generic functional architecture (non-interworking) 11 6.1.9 Physical realizations of generic functional architecture for multimedia communication over an IP network (non-interworking) 12 6.1.10 Generic functional architecture for interworking with an SCN 13 6.1.11 Physical realizations of generic functional architecture for interworking with an SCN 13 6.1.12 Simple terminals 15 6.2 Naming and addressing 16 6.3 Security 16 6.4 Quality of service (QoS) 17 6.5 Mobility 18 7 Standards for multimedia communication over an IP network 18 7.1 Overview 18 7.2 The ITU-T H.323 family of recommendations 19 7.2.1 Functional architecture 19 7.2.2 Naming and addressing 20 7.2.3 Supplementary services 20 ili from IHS Not for Resale