1、ITU-T RECMN*Q-b4b 73 W 4862571 0584592 9YL W INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU INTERWORKING OF SIGNALLING SYSTEMS Q.646 (03/93) INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM No. 5 TO SIGNALLING SY
2、STEM No. 7 (ISUP) ITU-T Recommendation Q.646 (Previously “CCITT Recommendation”) ITU-T RECNN*Q.bYb 93 48b259L 0584593 888 FOREWORD The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecom- munication Union. The IT-T is responsible for studying techni
3、cal, operating and tariff questions and issuing 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,
4、 in their turn, produce Recommendations on these topics. ITU-T Recommendation 4.646 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
5、 CC ceased to exist as of 28 February 1993. In its place, the 1?iJ Telecommunication Standardization Sector (-T) was created as of 1 March 1993. Similarly, in this reform process, the CCIR and the IFRI3 have been replaced by the Radiocommunication Sector. In order not to delay publication of this Re
6、commendation, no change has been made in the text to references containing the acronyms ?CCITT, CCIR or ZFRB? or their associated entities such as Plenary Assembly, Secretariat, etc. Future editions of this Recommendation will contain the proper terminology related to the new structure. 2 telecommun
7、ication administration and a recognized 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
8、, including photocopying and microfilm, without permission in writing from the ITU. ITU-T RECMN*Q=hYh 93 = Y862591 058Y594 714 Recommendation Q.646 INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM No. 5 TO SIGNALLING SYSTEM No. 7 (ISUP) (Helsinki, 1993) Sta
9、te number O0 o1 02 03 04 05 06 State desct-hn Idle Wait for CPCI-FITE Wait for ST Wait for addresscomplete Wait for mmer Answered Wait for resume (clear back) FIGURE UQ.646 State overview diagram for interworking of Signailing System No. 5 to Signalling System No. 7 ( ISUP) FIGURE UQ.646 (Reserved f
10、or future notes) Recommendation Q.646 (03/93) 1 ITU-T RECMN*Q*b4b 93 W 48b2591 0584595 650 1 2 I Activate interworking SS NO. 5 SC NO. 7 / IISUP) I o1 Wait for CPCI-FITE I I FITE 22 FITES 9-13,17 FITE 1 4 Activate i going Ie ssNo.7 (ISUP) T1124914W2 SPITE 52 Call setup info (Table 1) FITE 24 P2 FIGU
11、RE 3/Q.M (sheet 1 of 5) Interworking of Signailing System No. 5 to Signalling System No. 7 SUP) 2 Recommendation Q.646 (03/93) ITU-T RECMN*Q-b4b 93 m 48b259L 058459b 597 m Recommendation Q.646 (03/93) 3 ITU-T RECMN*Qmb4b 93 9 4862591 0584597 423 9 r- Cu W k- LJ N N E m Co UI t m a* r- E a Wal inm t
12、4 Recommendation Q.646 (03193) - ITU-T RECMN*Q.b4b 93 4862573 0584598 3bT 10 9 7,8 11,12 9 13 BITE Y a 3 3,5 F BITE 22 (1 Answered I l I I FITE 23 FITE 23 I o T1141450-9Zd05 NOTE - In principle, FITE 22 should result in cause 16. However, in cases where FITE 22 results from a timeout expiry, cause 1
13、27 should be sent. FIGURE 3/Q.646 (sheet 4 of 5) Interworking of Signalling System Na 5 to Signalling System Na 7 (ISUP) Recommendation Q.646 (03/93) 5 ITU-T RECNNmQmb4b 93 = 48b257L 0584577 2Tb N r 7 7 6 Recommendation Q.646 (03/93) ITU-T RECMN*Q.646 93 m 4862593 0584600 848 m SPITE 20 TABLE 1/Q.46 SI SPITE 22 NA1 I Yes No 100 o1 1 Yes No o1 O0 SPITE 21 Yes No Recommendation 4.646 (03D3) 7 ECI 1 O
