1、ITU-T RECUN*d-bBb 93 M L)862591 0588303 839 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU INTERWORKING OF SIGNALLING SYSTEMS Q.686 (03/93) INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM R2 TO SIGNALLING SYSTEM
2、 No. 7 (ISUP) ITU-T Recommendation Q.686 (Previously “CCITT Recommendation”) ITWT RECMN*Q.b8b 93 = 48b2591 0588102 775 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 technica
3、l, 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, i
4、n their turn, produce Recommendations on these topics. ITU-T Recommendation 4.686 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 C
5、CITT ceased to exist 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 Similarly, in this reform process, the CCIR and the IFRB have been replaced by the Radiocommunication Sector.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
6、Recommendation, no 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 tele
7、communication administration and a recognized operating agency. In this Recommendation, the expression “Administration” is used for conciseness to indicate both a o ITU i994 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mech
8、anical, including photocopying and microfilm, without permission in writing from the ITU. ITU-T RECMN*Q=b86 93 m 4Bb2593 0588303 bo3 m Recommendation Q.686 INTERWORKING OF SIGNALLING SYSTEMS - LOGIC PROCEDURES FOR INTERWORKING OF SIGNALLING SYSTEM R2 TO SIGNALLING SYSTEM No. 7 (ISUP) (Helsinki, 1993
9、) T1141540-92/dO 1 State number State descr#iron Sheet refwmce o0 o1 02 03 o4 05 o6 Idle Wait for CPCI-FITE wait for zdQa Wait for address-complete wait for answer AnSWerd Wait for rame FIGURE UQ.686 State overview diagram for interworking of Signalling System R2 to Signalling System No. 7 (ISUP) FI
10、GURE UQ.686 1,2,3 1 1 2 3 3 3 (Reserved for future notes) Recommendation 4.686 (03/93) ITU-T RECUN*Q.bBb 93 YBb259L 0588L04 5Y8 FITE 14 flTE 16 FITE 18 1 FITE 19 2 wait for Zdigit I FITES 9, 10, 11, Activate outgoing SS No. 7 (ISUP) FITE 24 D o FIGURE 3/Q.686 (sheet 1 of 3) interworking of Signallin
11、g System R2 to Signailing System No. 7 (ISUP) Recommendation Q.686 (0-3) n al - 0 8 W Recommendation 4.686 (0393) 3 4 ITU-T RECflN*Q.b8b 93 9 48b2591 058830b 310 9 BITE 21 1 c“-) eJ BITE Z -.; NOTE - In principle, FITE 22 should result in cause 16. However, in cases where FWE 22 results from a timeo
12、ut expiry, cause 127 should be sent. FIGURE 3/Q.686 (sheet 3 of 3) interworking of Signailing System R2 to Signalling System No. 7 (ISP) Recommendation Q.686 (OY93) TABLE UQ.686 FITE A contruction SPITE 36 Yes No Received FITE CCH O1 O0 9 10 11 12 13 14, 15, i6 18 19 No CPC O1 1 1 2 3 4 5 10 11 12 S
13、PITE 21 Yes No ECI 1 O SPITE 22 NA1 TMR=11 CPC Calling partys category CCH Continuity check indicator NA1 Nature of address indicator SI Satellite indicator ECI Echo control indicator TMR Transmission medium requirement Recommendation Q.686 (03/93) 5 TABLE 2/Q.686 BITE X anaiysis Received BITE Y CH
14、- O0 o1 10 BITE n to be sent BITE 21 BITE 21 BITE 21 BITE 21 6 Recommendation Q. (03/93) ITU-T RECMN*Q-b8b 93 = 48b259L 058BL09 02T W - Received CONNECT fields CH ST CAT O0 O0 O0 O0 O0 o1 O0 O0 10 O0 o1 O0 O0 o1 O1 O0 o1 10 O1 O0 O0 O1 O0 o1 o1 O0 10 o1 o1 O0 o1 o1 o1 o1 o1 10 10 O0 00 10 O0 O1 10 O
15、0 10 10 O1 O0 10 o1 01 10 o1 10 TABLE 4fQ.686 CONNECT analysis BITE J BITE K BITE 2 + BITE 27 BITE 21 BITE 2 + BITE 27 BITE 21 BITE 2 + BITE 27 BITE 21 BITE 5 BITE 21 BITE 5 BITE 21 BITE 5 BITE 21 BITE 6 BITE 21 BITE 6 BITE 21 BITE 21 BITE 6 BITE 6 BITE 21 BITE 6 BITE 21 BITE 6 BITE 21 BITE 2 + BITE 27 BITE 21 BITE 2 + BITE 27 BITE 21 BITE 2 + BITE 27 BITE 21 BITE 5 BITE 21 BITE 5 BITE 21 BITE 5 BITE 21 Received BITE Z Cause 34 28 1 17 27 31 4 Other TABLE 5JQ.686 Received RELEASE analysis before ACM Sent BITE n 11 20 15 16 17 11 20 12 Recommendation Q.686 (03/93) 7
