ISO/IEC INTERNATIONAL STANDARD 11572 Third edition 2000-03-15 Information technology - Telecommunications and information exchange between systems Private Integrated Services Network Circuit mode bearer services Inter-exchange signalling procedures and protocol Technologies de I'information - Télecommunications et échange d'information entre systemes - Réseau prive a intégration de services Services porteurs en mode circuit Proceédures et protocole de signalisation d'interéchange Reference number ISO/IEC 11572:2000(E) E( @ ISO/IEC 2000 IHS under nse from IHS Not for Resale ISO/IEC 11572:2000(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 trademarkof 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/IEC2000 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 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ISO/IEC2000-All rightsreserved ermittedwithoutlicense from IHS Not for Resale ISO/IEC 11572:2000(E) Contents Page Foreword vii Introduction vili 1 Scope 1 2 Conformance 1 3 Normative references 1 4 Terms and definitions 1 5 List of acronyms 3 6 General principles 3 6.1 Protocol model 4 6.2 Services provided to Call Control 4 6.3 Services required of the Signalling Carriage Mechanism 5 7 Protocol Control states 5 7.1 States for circuit-mode Call Control 5 7.1.1 Null State (0) 5 7.1.2 Call Initiated (1) 5 7.1.3 Overlap Sending (2) 5 7.1.4 Outgoing Call Proceeding (3) 5 7.1.5 Call Delivered (4) 5 7.1.6 Call Present (6) 5 7.1.7 Call Received (7) 5 7.1.8 Connect Request (8) 5 7.1.9 Incoming Call Proceeding (9) 6 7.1.10 Active (10) 6 7.1.11 Disconnect Request (11) 6 7.1.12 Disconnect Indication (12) 6 7.1.13 Release Request (19) 6 7.1.14 Overlap Receiving (25) 6 7.2 States for layer management 6 7.2.1 Null State (Rest O) 6 7.2.2 Restart Request (Rest 1) 6 7.2.3 Restart (Rest 2) 6 8 Call Control 6 8.1 States for Transit PINX Call Control 7 8.1.1 TCC_Idle (0) 7 8.1.2 TCC_Await Digits (1) 7 8.1.3 TCC_Await Additional Digits (2) 7 8.1.4 TCC_Overlap (3) 8.1.5 TCC_Incoming Call Proceeding (4) 777 8.1.6 TCC_Transit Call Proceeding (5) 8.1.7 TCC_Call Alerting (6) 8.1.8 TCC_Call Active (7) 777 8.1.9 TCC_Await Incoming Release (8) 8.1.10 TCC_Await Outgoing Release (9) 8.1.11 TCC_Await Two-Way Release (10) 77 8.1.12 TCC_Await Incoming Disconnect (11) dahs red iii ted withoutlicense from IHS Not for Resale ISO/IEC 11572:2000(E) 8.1.13 TCC_Await Outgoing Disconnect (12) 7 8.1.14 TCC_Await Two-Way Disconnect (13) 8 9 General procedures 8 9.1 Use of the services of Signalling Carriage Mechanism 8 9.1.1 Establishment of a Signalling Carriage Mechanism connection 8 9.1.2 Transfer of data 8 9.1.3 Signalling Carriage Mechanism reset 8 9.1.4 Signalling Carriage Mechanism failure 8 9.2 Handling of protocol error conditions 8 9.2.1 Protocol discriminator error 8 9.2.2 Message too short 8 9.2.3 Call reference error 8 9.2.4 Message type or message sequence errors 9 9.2.5 General information element errors 9 9.2.6 Mandatory information element errors 10 9.2.7 Non-mandatory information element errors 10 9.2.8 Signalling Carriage Mechanism reset 11