ITU-T Q 696-1997 Interworking between the Signalling System No 7 ISDN User Part (ISUP) and Signalling Systems No 5 R2 and Signalling System No 7 TUP (Study Group 11 50 pp)《NO 7信令系统.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 4.696 (06197) SERIES Q: SWITCHING AND SIGNALLING Interworking of Signalling Systems - Logic procedures Interworking between the Signalling System No. 7 ISDN User Part (ISUP) and Signalling Systems No. 5, R2 a

2、nd Signalling System No. 7 TUP ITU-T Recommendation Q.696 (Previously CCIlT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING Interworking between Digital Subscriber Signalling System No. 1 and Signalling Q.699 System No. 7 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700-(2.849

3、 Test specification Q.780-Q.799 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. I Q.850-Q.999 PUBLIC LAND MOBILE NETWORK Q.1000-Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.IlOO-Q.1199 BROADBAND ISDN Q.2000-Q.2999 INTELLIGENT NETWORK Q. 1200-Q. 1999 U SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE F

4、UNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM RI SPECIFICATIONS OF SIGNALLING SYSTEM R DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS INTERNATIONAL AUTOM

5、ATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General considerations Q.lQ.3 Q.4-Q.59 Q.60-Q.99 Q. 1004.1 19 Q.120-Q.249 Q.250-Q.309 Q. 3 1 W. 399 Q.400-Q.499 Q .50O-Q. 599 Q.600-Q.699 Q.600-Q.609 For fitrther details, please refer to ITU-T List of Recommendations. ITU-

6、T RECOMMENDATION 4.696 INTERWORKING BETWEEN THE SIGNALLING SYSTEM No, 7 ISDN USER PART (ISUP) AND SIGNALLING SYSTEMS No. 5, R2 AND SIGNALLING SYSTEM No. 7 TUP Summary This Recommendation defmes the interworking between the Signalling System No. 7 ISDN User Part 92 (ISUP) and the Signalling Systems N

7、o. 5, R2, TUP. ISDN UP 92 has been designed to allow peer-to-peer operation to a 4.767 exchange without requiring any knowledge of that situation. This means that different ISUP versions (like 4.767 and ISUP92) cannot be considered as different signalling systems in an exchange. This specification i

8、s applicable to international transit exchanges, but may be used as a basis for the interworking in international gateway exchanges, because ISUP at the national side may also be based on ISUP92. Source ITU-T Recommendation 4.696 was prepared by ITU-T Study Group 11 (1997-2000) and was approved unde

9、r the WTSC Resolution No. 1 procedure on the 5th of June 1997. STD-ITU-T RECMN Q-bSb-ENGL 1997 W 48b259L Ob4Ub00 435 FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The IT Telecommunication Standardization Sector (ITU-T

10、) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, 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 ever

11、y four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the IT-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology w

12、hich fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression ”Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PR

13、OPERTY RIGHTS The IT draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, wheth

14、er asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU hadhad not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors

15、are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopyin

16、g and microfilm, without permission in writing from the IT. ii Recommendation 4.696 (06/97) - 1 2 3 3.1 3.2 4 4.1 4.2 5 5.1 5.2 5.3 5.4 6 6.1 6.2 6.3 CONTENTS Scope Normative references Definitions. symbols and abbreviations . Definitions Abbreviations . General considerations . General . Working as

17、sumptions . Miscellaneous intenvorking aspects . Intenvorking handling of the echo control device indicator (or the incoming half echo suppressor indicator) of the Address Complete Message (ACM) in ISUP (or TUP) 5.1.1 Call originating from ISUP to R. No . 5 5.1.2 5.1.3 Handling of the called partys

18、category and the charge indicator in case of a call Transfer of no charge or charge information in the answer message in case of a call Call originating fiom ISUP to TUP Call originating fiom TUP to ISUP originating fiom TUP to ISUP . originating from TUP to ISUP . Simple segmentation Interworking .

19、 Call originating from SS ISUP to Signalling System No . 5 . 6.1.1 Forward direction 6.1.2 Backward direction . 6.1.3 Considerations on supplementary services . Call originating from SS ISUP to SS FU 6.2.1 Forward direction 6.2.2 Backward direction . 6.2.3 Considerations on supplementary services .

20、Call originating from SS ISUP to SS Tup . 6.3.1 Forward direction 6.3.2 Backward direction . 6.3.3 Considerations on supplementary services . .:. Recommendation 4.696 (06/97) Page 1 1 2 2 2 3 3 3 3 3 4 4 4 4 5 5 5 5 5 6 8 9 9 10 12 13 13 15 17 iii 6.4 6.5 6.6 - STDmITU-T RECMN Q-bSb-ENGL 1997 48b259

21、1 Ob40b02 208 Call originating from Signalling System No. 5 to SS ISUP .,. 6.4.1 Forward direction . 6.4.2 Backward direction ., 6.4.3 Considerations on supplementary services . . . . . , . . . . . . . . . . . Call originating from SS R2 to SS IS Up.,. 6.5.1 Forward direction . . . . . . . . . . . .

22、 . . . . . . . . . . 6.5.2 Backward direction . 6.5.3 Considerations on supplementary services . . . . . . . . . . . . . . . . . . . Call originating from SS TUP to SS IS Up. 6.6.1 Forward direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.6.2 Backward direction . 6.6.3 Consider

23、ations on Supplementary Services . . . . . . . . . . . . . . . , Page 18 18 20 21 21 21 23 25 25 25 28 30 Appendix I -Echo control procedure in case of interworking 31 I. 1 Call originating from No. 5, R2 to ISUP 31 I. 1.1 Forward direction . 31 I. 1.2 Backward direction 31 33 1.2 Call originating f

24、rom ISUP to No. 5, R2 1.3 Examples .,.,. 35 iv Recommendation 4.696 (06/97) Recommendation Q.696 INTERWORKING BETWEEN THE SIGNALLING SYSTEM No. 7 ISDN USER PART (ISUP) AND SIGNALLING SYSTEMS No. 5, R2 AND SIGNALLING SYSTEM No. 7 TUP (Geneva, 1997) 1 Scope This Recommendation defines the interworking

25、 between the Signalling System No. 7 ISDN User Part 92 (ISUP) i and the Signalling Systems No. 5, R2, “P, 4,5 and 21. ISDN UP 92 has been designed to allow peer-to-peer operation to a 4.767 exchange without requiring any knowledge of that situation. This means that different ISUP versions (like 4.76

26、7 and ISUP92) cannot be considered as different signalling systems in an exchange. A specific interworking specification is not required, relevant information is contained in 11. This specification is applicable to international transit exchanges, but may be used as a basis for the , interworking in

27、 international gateway exchanges, because ISUP at the national side may also be based on ISUP92. 2 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publ

28、ication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list

29、of the currently valid ITU-T Recommendations is regularly published. PI I 141 c31 91 CCITT Recommendation 4.767 (1991), Application of the ISDN user part of CCIT Signalling System No. 7 for international ISDN interconnections. ITU-T Recommendations 4.761 to 4.764 (1993), ISDN user part. CCITT Recomm

30、endations 4.721 to 724 (1988), Telephone User Part (TUP). CCITT Recommendation 4.107 (1988), Standard sending sequence of forward address information. ITU-T Recommendation Q. 115 (1993), Control of echo suppressors - Control of echo suppressors and echo cancellers. CCITT Recommendations Q. 140 to Q.

31、 164 (1 988), Speczjications of Signalling System No. 5. CCITT Recommendations 4.400 to 4.490 (1988), SpeciJications of Signalling System R2. ITU-T Recommendation 4.6 17 (1993), Logic procedures for incoming Signalling System No. 7 (ISUP). ITU-T Recommendation 4.627 (1 993), Logic procedures for out

32、going Signalling System No. 7. ITU-T Recommendation 4.646 (1 993), Logic procedures for interworking of Signalling System No. 5 to No. 7 (ISUP). Recommendation 4.696 (06197) 1 li (123 131 i 41 151 ITU-T Recommendation 4.667 (1993), Logic procedures for interworking of Signalling System No. 7 (TUP) t

33、o No. 7 (ISUP). ITU-T Recommendation 4.686 (1993), Logic procedures for interworking of Signalling System R2 to Signalling System No. 7 (ISUP). ITU-T Recommendation 4.690 (1 993), Logic procedures for interworking of Signalling System No. 7 (ISUP) to No. 5. ITU-T Recommendation Q.692 (1 993), Logic

34、procedures for interworking of Signalling System No. 7 (ISUP) to No. 7 (TUP). ITU-T Recommendation 4.695 (1993), Logic procedures for interworking of Signalling System No. 7 (SUP) to R2. 3 Definitions, symbols and abbreviations 3.1 Definitions This Recommendation defines the following terms: 3.1.1 “

35、call originating from SS X to SS Y“ describes the signalling interworking for traffic which is routed (in call set-up direction) from an incoming SS X trunk-group to an outgoing SS Y 3.1.2 3.1.3 - considerations on supplementary services; - supplementary information about the call failure handling;

36、- considerations on the sequencing of the received messages; - handling of the access information. This Recommendation can be used as a complement of the ITU-T interworking SDL specifications (8 to i 51) and not as an independent specification. Only the information being a matter of interworking are

37、 described. Hence, no information is given concerning the: - nationalintemational call indicator; - end-to-end method indicator; - end-to-end information indicator; - - - signalling connection control part method indicator; continuity check indicator in interworking cases R2, No. 5 to ISUP; continui

38、ty message in interworking cases R2, No. 5 to ISUP; Medium Requirement parameter); parameters and messages that are discarded because of interworking when they have no impact on call processing. Items which are valid for both 4.767 and ISUP92 are identical in the interworking specification for Recom

39、mendation 4.767 and this Recommendation. I - handling of the routing (e.g. analysis of the ISUP Preference indicator and the Transmission - compatibility procedure; - 4.2 Working assumptions This Recommendation is based on the assumption that: - - TUP 2 does not support any supplementary service but

40、 the “digital connectivity“; TUP supporting IAM (Initial Address Message) only, not IAI (Initial Address Message with Additional Information), is described. 5 Miscellaneous interworking aspects 5.1 Interworking handling of the echo control device indicator (or the incoming half echo suppressor indic

41、ator) of the Address Complete Message (ACM) in ISUP (or TUP) In order to send more accurate information in the backward direction, the following interworking handling is proposed which can be used independently of the echo control procedures (described in Recommendations 4.724 3, 4.764 2 and Q.115 5

42、). Recommendation 4.696 (06197) 3 5.1.1 a) b) Call originating from ISUP to R2, No. 5 If the bit E of the echo control device indicator received in the IAM is coded “O“ (no outgoing half-echo control device is included) and the delay value is lower than the allowed one or not available and the excha

43、nge has not sufficient information to determine that echo control is required for the outgoing circuit, then bit N of the echo control device indicator of the ACM is coded “O“. If the bit E of the echo control device indicator received in the IAM is coded “1“ (an outgoing half-echo control device is

44、 included): if an incoming half-echo control device is locally included or if it is known fiom the routing data available in the exchange that an incoming half-echo control device can be inserted beyond the interworking point, then the bit N of the echo control device indicator of the ACM is coded 1

45、 I; if it is known fiom the routing data available in the exchange that no incoming half-echo control device can be included beyond the interworking point and no incoming half-echo control device is locally available, then the bit N of the echo control device indicator is coded “O“. For further info

46、rmation, refer to Appendix I. 5.1.2 Call originating from ISUP to TUP If the bit E of the echo control device indicator received in the IAM is coded “O“ (no outgoing half-echo control device is included) and the delay value is lower than the allowed one or not available and the exchange has not suff

47、icient information to determine that echo control is required for the outgoing circuit, then the bit N of the echo control device indicator of the ACM is coded as received in the ACM (TUP: bit D of the incoming half-echo suppressor). 5.1.3 a) Call originating from TUP to ISUP If the bit G of the mes

48、sage indicators received in the IAM is coded “O“ (outgoing half-echo suppressor not included), the bit D of the incoming half-echo suppressor indicator in the ACM is coded as received in the ACM (bit N of the echo control device indicator). If the bit G of the message indicators received in the IAM

49、is coded “1“ (outgoing half-echo suppressor included): 1) if the incoming half-echo control is locally included, then the bit D of the incoming half-echo suppressor indicator of the ACM is coded I 1 I; 2) if no incoming half-echo control device is locally included, the bit D of the incoming half echo suppressor indicator in the ACM is coded as received in the ACM (bit N of the echo control device indicator). b) 5.2 Handling of the called partys category and the charge indicator in case of a call originating f