1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.675 (03/93) INTERWORKING OF SIGNALLING SYSTEMS INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM RI TO SIGNALLING SYSTEM No. 7 (ISUP) ITU-T Recommendation Q.675 (Pr
2、eviously “CCITT Recommendation”) ITU-T RECMN*Q.b75 73 m 4b257l1 0589357 77T FOREWORD The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecom- munication Union. The ITU-T is responsible for studying technical, operating and tariff questions and issui
3、ng Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, established the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on th
4、ese topics. ITU-T Recommendation Q.675 was prepared by the ITU-T Study Group XI (1988-1993) and was approved by the WTSC (Helsinki, March 1-12, 1993). NOTES 1 As a consequence of a reform process within the International Telecommunication Union (ITU), the CCITT ceased to exist as of 28 February 1993
5、. In its place, the ITU Telecommunication Standardization Sector (ITU-T) was created as of 1 March 1993. Similarly, in this reform process, the CCIR and the IFRB have been replaced by the Radiocommunication Sector. In order not to delay Publication of this Recommendation, no change has been made in
6、the text to references containing the acronyms “CCITT, CCIR or IFRB” or their associated entities such as Plenary Assembly, Secretariat, etc. Future editions of this Recommendation will contain the proper terminology related to the new ITU structure. 2 telecommunication administration and a recogniz
7、ed operating agency. In this Recommendation, the expression “Administration” is used for conciseness to indicate both a O ITU 1994 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfil
8、m, without permission in writing from the ITU. ITU-T RECflN*Q=b75 93 m 48b2591 0589158 bob m Recommendation 4.675 INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM R1 TO SIGNALLING SYSTEM No. 7(ISUP) (Helsinki, 1993) State dexrpon Ide Wait fa CPCI Wait fa ST
9、 WaA fa addresscani a u m 2 F m ,9, I .? I/r, t Recommendation 4.675 (03/93) 3 -0 b o z 4 Recommendation Q.675 (03/93) li ! I t 11,12, I 1: ITU-T RECMN*Q.b75 93 q86259L 0589Lb2 037 3 BITE Y I i.-:.-. 0, o, FITE 23 c3 NTE - in principle, FITE 22 should result in cause 16. However, in cases where FTE
10、22 results from a timeout expiry, cause 127 should be sent. FIGURE 3/Q.675 (sheet 4 of 5) Interworking of Signalling System No. R1 to Signalling System No. 7 (ISUP) Recommendation Q.675 (Q3D3) 5 11,12 14,13 14, 9 7,13 ,Q. , ,Q. BITE 25 5 SPITE 6 Return Appropriate 1 Tone BITE 25 Wail for resume FITE
11、 23 0 0, FIGURE 314.675 (sheet 5 of 5) Interworking of Signalling System No. R1 to Signalling System No. 7 (ISUP) 6 Recommendation Q.675 (03/93) ITU-T RECMN*Q=b75 93 4862593 0589364 90T SPITE 36 Yes No CCH o1 10 SPITE 22 Yes No NAI 100 o1 1 Yes No SPITE 20 o1 00 SI SPITE 21 Yes No TMR= 11 ECI 1 O CPC Calling partys category CCH Continuity check indicator NAI Nature of address indicator SI Satellite indicator ECI Echo control indicator TMR Transmission medium requirement Recommendation 4.675 (03/93) 7
