ISO/IEC INTERNATIONAL STANDARD 15991 Second edition 2003-04-01 Information technology - Telecommunications and information exchange between systems Private Integrated Services Network - Specification, functional model and information flows Call Priority Interruption and Call Priority Interruption Protection supplementary services Technologies de I'information - Telécommunications et échange d'information entre systemes - Réseau prive a integration de services - Spécification, modele fonctionnel et flux d'informations Services supplementaires d'interruption de priorite d'appel et de protection d'interruption de priorite d'appel Reference number ISO/IEC 15991:2003(E) TSO TEC ISO/IEC2003 from IHS Not for Resale ISO/IEC 15991:2003(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 file is suitable for use by IsO member bodies. In ?ISO/IEC2003 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-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland yationagazaiSandardizatio ISO/IEC2003-Allrightsreserved Not for Resale ISO/IEC 15991:2003(E) Contents Foreword vi Introduction vii 1 Scope 1 2 Conformance 1 3 Normative references 1 4 Terms and definitions 2 4.1 External definitions 2 4.2 Additional network feature 2 4.3 Call, Basic call 2 4.4 Call Priority Interruption Capability Level (CPICL) 2 4.5 Call Priority Interruption Protection Level (CPIPL) 2 4.6 Established call 3 4.7 Impending priority interruption state 3 4.8 Impending priority interruption warning notification 3: 4.9 Non-priority call 3 4.10 Priority call 3: 4.11 Protected call 3 4.12 Served user 3 4.13 Time to priority interruption 3 4.14 Unprotected call 3 5 List of acronyms 6 SS-CPI stage 1 specification 4 6.1 Description 4 6.1.1 General description 4 6.1.2 Qualifications on applicability to telecommunication services 4 6.2 Procedure 4 6.2.1 Provision/withdrawal 4 6.2.2 Normal procedures 4 6.2.3 Exceptional procedures 6 6.3 Interaction with other supplementary services and ANFs 6 6.3.1 Calling Name Identification Presentation (SS-CNIP) 6 6.3.2 Connected Name Identification Presentation (SS-CONP) 6 6.3.3 Completion of Call to Busy Subscriber (SS-CCBS) 6 6.3.4 Completion of Call on No Reply (SS-CCNR) 6 6.3.5 Call Transfer (SS-CT) 6 6.3.6 Call Forwarding Unconditional (SS-CFU) 6 6.3.7 Call Forwarding Busy (SS-CFB) 6 6.3.8 Call Forwarding No Reply (SS-CFNR) 6 6.3.9 Call Deflection (SS-CD) 6 6.3.10 Path Replacement (ANF-PR) 6 6.3.11 Call Offer (SS-CO) 6 6.3.12 Call Intrusion (SS-CI) 6 6.3.13 Do not Disturb (SS-DND) 6 6.3.14 Do not Disturb Override (SS-DNDO) 6 6.3.15 Advice of Charge (SS-AOC) 6 @ ISO/IEC 2003 - All rights reserved ii Not for Resale ISO/IEC 15991:2003(E) 6.3.16 Recall (SS-RE) 6 6.3.17 Call Interception (ANF-CINT) 77 6.3.18 Transit Counter (ANF-TC) 6.3.19 Interaction with Wireless Terminal Location Registration (SS-WTLR) 7 6.3.20 Interaction with Wireless Terminal Incoming Call (ANF-WTMI) 7 6.3.21 Interaction with Wireless Terminal Outgoing Call (ANF-WTMO) 7 6.3.22 Interaction with Wireless Terminal Authentication of a WTM user (SS-WTAT) 7 6.3.23 Interaction