1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 1 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU).4%27/2+).G0G0/&G0G03).!,).G0G03934%-3,/)#G0G002/#%$52%3G0G0&/2G0G0/54/).3).!,).G0G03934%-G0G02 )45G134G0G0RecommendationG0G01 (Extract from the “LUEG0“OOK)NOTES1 ITU-T Recommendation Q.625 was published in
2、Fascicle VI.6 of the Blue Book. This file is an extract from theBlue 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 In t
3、his 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 ormec
4、hanical, including photocopying and microfilm, without permission in writing from the ITU.Fascicle VI.6 - Rec. Q.625 1Recommendation Q.625LOGIC PROCEDURES FOR OUTGOING SIGNALLING SYSTEM R1Supervisory timers for outgoing Signalling System R1t1 = 5 1 s Recommendation Q.321, 3.2.1, b), ii)t2 = 5 s Reco
5、mmendation Q.325, 3.6.2, 1), a)t3 = 5 s Recommendation Q.325, 3.6.2, 1 ), b)t4 = 100 + 68 ms Recommendation Q.322, 3.3.4t5 = 2 x 68 ms Recommendation Q.322, 3.3.4Remarks to facilitate reading and understanding the SDL flow charta) The procedure P2for non-receipt of seizing acknowledgement is describ
6、ed in Recommendation Q.325, 3.2.6, 1), a).b) The procedure P3, related to dual seizure with both-way operation, is not described because no procedure is specified withconsequences to interworking.c) The time supervisions t4and t5are introduced to ensure the possibility of handling a clear-forward signal during outpulsing.d) It is assumed that no country code digits are sent in the outgoing Signalling System R1 procedu res.FIGURE 2/Q.625Notes to outgoing Signalling System R12 Fascicle VI.6 - Rec. Q.625Fascicle VI.6 - Rec. Q.625 3
