1、ITU-T RECMN*Q.671 73 4862591 0585833 T43 INTERNATIONAL TELECOMMUN CATION UN ION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU INTERWORKING OF SIGNALLING SYSTEMS Q.691 (03/93) INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM No. 7 (ISUP) TO No. 6 ITU
2、T Recommendation Q.691 (Previously “CCITT Recommendation”) ITU-T RECMN*Q-b91 93 4862593 0585834 98T FOREWORD The IT 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 ta
3、riff 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, in their turn, produ
4、ce Recommendations on these topics. ITU-T Recommendation 4.691 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 exis
5、t as of 28 February 1993. 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 Similarly, in this reform process, the CCIR and the IFRB have been replaced by the Radiocommunication Sector.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
6、change has been made in 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 admin
7、istration 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, including p
8、hotocopying and microfilm, without permission in writing from the ITU. ITU-T RECMN*Q.b92 93 4862591 0585835 B1b Recommendation Q.691 INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM No. 7 (ISUP) TO No. 6 (Helsinki, 1993) T1141580-921611 State rmmber State d
9、acrption Sheet reference 00 o1 02 03 o4 05 Idle 1,2,3,4 wait for call set up information Wait for address-complete 2 Wait for answer 2 Answered 4 Clear-back 4 1 FIGURE UQ.691 State overview diagram for interworking of Signalling System Na 7 (ISUP) toNa 6 Procedures not shown The following procedure,
10、 not directly relevant to interworking, is not shown in the logic: PI - Procedures for repeat attempt. FIGURE YQ.691 Notes to interworking of Signalling System No. 7 (TUP) to No. 6 Recommendation Q.691 (03/93) 1 ITU-T RECMN*Q.bSL COnneCtor reference 93 4b259L 058583b 752 = 1 Activate interworking SS
11、 No. 7 (ISUP) to No. 6 4 Walt for call set up info I FITE A call set up info I SPITE 53 u Activate outgoing SS No. 6 proceaire FITES 9-1 3, 17-19 YeS FITE 3 A FIGURE 3/Q.691 (sheet 1 of 4) interwarking af Signaiiing System No. 7 (ISUP) to No. 6 2 Recommendation Q.691 (03/93) ITU-T RECflNUQ-69L 93 48
12、62593 0585837 699 O R w LL t A v 8 l w I- W 7 N r 7 U ci Recommendation Q.691 (03/93) 3 ITU-T RECMN*Q-b9b 93 m 4862573 0565838 525 m BITE 22 BITE 23 64 FITE Z BITES 10, 12,19 FITE 22 SPITE 53 (Table 2) 4 BITE Z Idle I FIGURE 3/Q.691 (sheet 3 of 4) Jnterworking of Signalling System No. 7 (ISP) to Na
13、6 zl FITE 23 FITE 23 Q T1130750-911d04 4 Recommendation Q.691 (03/93) ITU-T RECMN*Q.bL 73 m 4862571 0585837 461 Connector reference A 3 4 3 4, : Answered 0 BITE 25 1 FITE 23 FITE 23 04 FITE Z FITE 22 4 Ide FITE 23 FITE 23 04 BITE 24 a BITE 24 3 64 2 1 BITES 9, 10, 12, 14-17, 19,20 FIGURE 3/Q.691 (sh
14、eet 4 of 4) Interworking o Sigiialling System No. 7 (ISUP) to No. 6 SPITE 53 (Table 2) cl BITE Z (e) Recommendation Q.691 (03/93) 5 ITU-T RECMN*Q-b9L Backward call indicators in ACM 93 2 3 W 48b259L TABLE UQ.691 10 O0 O0 1 0585840 o1 O0 O0 1 183 W Received BITE 22 23 Interworking Called partys Calle
15、d partys status category Charge indicator 10 o1 O0 0 O1 O1 O0 0 Charging indicator Called partys status Called partys category Interworking indicator Received BITE (release) 9 10 12 14 15 16 17 19 20 * a) Only in timeout expiry. TABLE 2/Q.691 Cause sent 42 34 34 28 1 17 27 311127 a) 4 Location 1010 1010 1010 1010 1010 1010 1010 1010/0111 a) 1010 TABLE 3/Q.691 I Backward call indicators in ANM i 6 Recommendation Q.691 (03/93)
