1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 1 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU).4%27/2+).G0G0/&G0G03).!,).G0G03934%-3,/)#G0G002/#%$52%3G0G0&/2G0G0/54/).3).!,).G0G03934%-G0G0.O G0 )45G134G0G0RecommendationG0G01 (Extract from the “LUEG0“OOK)NOTES1 ITU-T Recommendation Q.623 was published
2、 in Fascicle VI.6 of the Blue Book. This file is an extract fromthe Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, thecontents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below).2
3、In this Recommendation, the expression “Administration” is used for conciseness to indicate both atelecommunication administration and a recognized operating agency. ITU 1988, 1993All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic o
4、rmechanical, including photocopying and microfilm, without permission in writing from the ITU.Fascicle VI.6 - Rec. Q.623 1Fascicle VI.6 - Rec. Q.623Recommendation Q.623LOGIC PROCEDURES FOR OUTGOING SIGNALLING SYSTEM No. 6Supervisory timers for outgoing Signalling System No. 6t1= 2s Recommendation Q.
5、271, 5.7.1t2= 20-30s Recommendation Q.268, 4.8.5.1, a)t3= 4-15s Recommendation Q.268, 4.8.2.3t4= 1 min.Recommendation Q.268, 4.8.2.3, a)Procedures not shownThe following procedures, not directly relevant to interworking, are not shown in the logic procedures:- Dual seizure.- Blocking and unblocking
6、sequences.- Unreasonable sequences.- Confusion and message refusal signals.- Reset circuit/band procedures.- Test call procedures.- Out of service.Signal abbreviations usedThe signal abbreviations used correspond to those of the Signalling System No. 6 specifications unless otherwise indicated on the samesheet.FIGURE 2/Q.623Notes to outgoing Signalling System No. 62Fascicle VI.6 - Rec. Q.623Fascicle VI.6 - Rec. Q.62334Fascicle VI.6 - Rec. Q.623Fascicle VI.6 - Rec. Q.623 56 Fascicle VI.6 - Rec. Q.623
