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ISO/IEC INTERNATIONAL STANDARD 15992 Second edition 2003-04-01 Information technology Telecommunications and information exchange between systems Private Integrated Services Network Inter-exchange signalling protocol Call Priority Interruption and Call Priority Interruption Protection supplementary services Technologiesdel'information-Telecommunications etéchange d'information entresystemesRéseauprivea integration de services-Protocoledesignalisationd'échange-Services supplementairesd'interruption depriorited'appeletdeprotection d'interruption depriorite d'appel Reference number ISO/IEC 15992:2003(E) TSO @ISO/EC2003 ISO/IEC15992:2003(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 atrademarkof AdobeSystems 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 @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-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/IEC2003- -Allriahtsreserved ISO/IEC15992:2003(E) Contents Foreword Introduction vi 1 Scope 1 2 Conformance 1 3 Normative references 1 4 Terms and definitions 2 4.1 External definitions 2 4.2 Called user 3 4.3 Calling user 3 4.4 Call interruption 3 4.5 Call Priority Interruption Capability Level (CPICL) 3 4.6 Call Priority Interruption Protection Level (CPIPL) 3 4.7 3 Callprotection 4.8 Established call 3 4.9 Established call user 3 4.10 Established call user's PINX 3 4.11 Forced release 3 4.12 Inter-PINX link 3 4.13 Interrupting PINX 3 4.14 Non-priority call 3 4.15 Priority call 3 4.16 Protected call 3 5 List of acronyms 3 6 Signalling protocol for the support of SS-CPI(P) 4 6.1 SS-CPI(P) description 4 6.2 SS-CPI(P) operational requirements 4 6.2.1 Requirements on the Originating PINX 4 6.2.2 Requirements on the Terminating PINX 4 6.2.3 Requirements on a Transit PINX 4 6.2.4 Requirements on the Interrupting PINX 4 6.2.5 Requirements on the Established call user's PINX 4 6.3 SS-CPI(P) coding requirements 5 6.3.1 Operations 5 6.3.2 Notifications 9 6.3.3 Information elements 9 6.3.4 Messages 7 6.4 SS-CPI state definitions 7 6.4.1 States at the Originating PINX 7 6.4.2 States at the Transit PINX 7 6.4.3 States at the Interrupting PINX 7 6.5 SS-CPIP state definitions 7 6.5.1 States at the Originating PINX 7 6.5.2 States at the Transit PINX 7 6.5.3 States at the Terminating PINX 7 ISO/IEC.2003.-All rights reserved ili

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