1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2957.1 Amendment 1 (1 2/1999) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access signalling Stage 3 description for additional information transfer supplementary ser
2、vices using B-ISDN digital subscriber signalling system No. 2 (DSS2) - Basic call: User-to-user signalling (UUS) Amendment 1 ITU-T Recommendation Q.2957.1 - Amendment 1 (Formerly CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERV
3、ICE FUNCTIONS 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 R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORIUNG OF SIGNALLING SYSTEMS SPECIFICATION
4、S OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORIUNG WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS SIGNALLING REQUIREMENTS AND
5、 PROTOCOLS FOR IMT-2000 General aspects Signalling ATM adaptation layer (SAAL) Signalling network protocols Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking B-ISDN atitilication tirotocols for the network signalling - - B-TSDN application p
6、rotocols for access signalling Q.lLQ.3 Q.4-Q.59 Q.60.99 Q. 100.119 Q. 120.249 Q.250.309 Q.310.399 Q.400.499 Q.500.599 Q.600.699 Q.700.849 Q.850.999 Q. 1000. 1099 Q. 1 100.1199 Q. 1200.1699 Q.1700.1799 Q.2000.2999 Q.2000.2099 Q.2100.2199 Q.2200.2299 Q.2600.2699 Q.2700.2899 For further details, please
7、 re$er to the list of ITD-T Recommendations. ITU-T Recommendation 4.2957.1 Stage 3 description for additional information transfer supplementary services using B-ISDN digital subscriber signalling system No. 2 (DSS2) - Basic call: User-to-user signalling (UUS) AMENDMENT 1 Summary This amendment to R
8、ecommendation 4.2957.1 has been prepared to enable the transfer of additional information that is usable for the control of the operation of the Internet Protocol over switched VC connections. Recommendation 4.2957.1 defines the operation of the Digital subscriber Signalling System No. 2 (DSS2) for
9、the support of the User-to-User Signalling (UUS) supplementary service at the TB or the coincident SB and TB reference point of the user to network interface of the Broadband Integrated Services Digital Network (B-ISDN). Source Amendment 1 to ITU-T Recommendation 4.2957.1 was prepared by ITU-T Study
10、 Group 11 (1997-2000) and approved under the WTSC Resolution 1 procedure on 3 December 1999. ITU-T Q.2957.1/Amd.l(12/1999) 1 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization
11、 Sector (ITU-T) is a permanent organ of ITU. 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 meet
12、s every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In some areas of information technology which fall within ITU-Ts p
13、urview, 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 PROPERTY RIGHTS ITU draws a
14、ttention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or ot
15、hers outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represe
16、nt the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2001 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 microfilm, without permission in
17、writing fi-om the ITU. 11 ITU-T Q.2957.1/Amd.l(12/1999) CONTENTS 1.2 References . 1.8.3 Information elements . Appendix III . Coding of protocol discriminator ITU-T Q.2957.1/Amd.l(12/1999) Page 1 1 3 . 111 Introduction This amendment to Recommendation 4.2957.1 has been prepared to enable the transfe
18、r of additional information that is usable for the control of the operation of the Internet Protocol over switched VC connections. Recommendation 4.2957.1 defines the operation of the Digital subscriber Signalling System No. 2 (DSS2) for the support of the User-to-User Signalling (UUS) supplementary
19、 service at the TB or the coincident SB and TB reference point of the user to network interface of the Broadband Integrated Services Digital Network (B-ISDN). This amendment includes an additional reference, modification of the format and the coding of User-to-User information element, and the new a
20、ppendix (Appendix III), for the coding. The differences fiom ITU-T Recommendation 4.2957.1 (1995) are marked to emphasise the compatibility of this amendment with the original publication of this Recommendation. iv ITU-T Q.2957.1/Amd.l(12/1999) ITU-T Recommendation 4.2957.1 Stage 3 description for a
21、dditional information transfer supplementary services using B-ISDN digital subscriber signalling system No. 2 (DSS2) - Basic call: User-to-user signalling (UUS) AMENDMENT 1 1) Replace current subclause 1.2/Q.2957.1 with the reference below 1.2 References The following ITU-T recommendations and other
22、 references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encourag
23、ed to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. 11 ITU-T Recommendation 1.4 13 (1 993), B-ISDN user-network interface. 2 CCITT Recommendation I.
24、 130 (1988), Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN. 3 ITU-T Recommendation 4.2931 (1995), Digital Subscriber Signalling No. 2 (aSS2) - User-network inte flace (v2vr) layer 3 specijkation for basic call/connection contro
25、l. 4 CCITT Recommendation E. 164 (1991), Numberingplan for the ISDN era. 5 CCITT Recommendation 1.257.1 (1992), User-to-user signalling. 6 CCITT Recommendation X.213 (1992), I ISO/IEC 8348: 1993, Information technoloay - Open Systems Interconnection - Network service deflnition. 7 ITU-T Recommendati
26、on 1.580 (1 993), General arrangements for interworking between B-ISDN and 64 kbit/s based ISDN. 81 IETF RFC 3033 draft-ietf-mpls-it-uus-04.txl (2000). The assignment of the information fleld and protocol identifier in the 0.2941 Generic identifier and 0.2957 user-to-user si.gna1lin.g for the intern
27、et vrotocol. Replace current subclause 1.8.3/Q.2957.1, Information elements, with the description below 2) 1.8.3 Information elements The User-user information element is applicable to the operation of service 1. The purpose of the User-user information element is to convey information between B-ISD
28、N users. This information is not interpreted by the network, but rather is carried transparently and delivered to the remote user(s). The User-user information element shall be considered as an access information element (see Annex J/Q.2931 3). ITU-T Q.2957.1/Amd.l(12/1999) 1 I The coding for the Us
29、er-user information element is shown in Figure 1 - 1 and Table 1-7. User-user information element identifier O 1 1 1 1 1 1 1 Octet 1 ext. 1 Coding IE- instruction field 2 Standard Flag I Reserved I Action indicator I Y I Lenpth of User-user contents 3.4 Table 1-70.2957.1 - User-user information elem
30、ent Protocol l&wkk&d iscriminator m-m Protocol discriminator (octet 5) Note) 87654321 O O O O O 1 1 O Additional information for the control of the Internet Protocol over switched VC connections is specified in IETF RFC 3033 draft-ietf-mpls-.it-uus-04.txP NOTE - Further values for the Protocol discr
31、iminator field are defined in the Table 4-26/0.93 1 (for convenience these values are reproduced in Appendix IIv0.2957.1 Amendment 1). 5 or* 3) New Appendix IIVQ.2957.1, Coding of protocol discriminator 2 ITU-T Q.2957.1/Amd.l(12/1999) APPENDIX III Coding of protocol discriminator The coding is given
32、 in Table 4-26/Q.93 1 and attached to Recommendation 4.2957.1 for information. See Table III. 1. Table III.UQ.2957.1 - User-user information element (Table 4-26/Q.931) Protocol discriminator Bits 87654321 00000000 00000001 00000010 0000001 1 00000100 000001 o1 000001 11 00001000 00010000 through 001
33、11111 User-specific protocol (Note 1) OS1 high layer protocols X.244 (Note 2) Reserved for system management convergence function IA5 characters (Note 4) X.208 and X.209 coded user information (Note 5) V.120 rate adaption Q.93 1L.45 1 user-network call control messages Reserved for other network lay
34、er or layer 3 protocols, including Recommendation X.25 (Note 3) through National Use 1 01000000 01001111 Reserved for other network layer or layer 3 protocols, including Recommendation X.25 (Note 3) 1 01010000 through 11111110 All other values are reserved. NOTE 1 - The user information is structure
35、d according to user needs. NOTE 2 - The user information is structured according to Recommendation X.244 which specifies the structure of X.25 call user data. NOTE 3 - These values are reserved to discriminate these protocol discriminators fiom the first octet of an X.25 packet including general for
36、mat identifier. NOTE 4 - The user information consists of IA5 characters. NOTE 5 - The number of X.208 and X.209 components contained in a User-user information element as well as their semantics and use are user-application dependent and may be subject to other Recommendations. ITU-T Q.2957.1/Amd.l
37、(12/1999) 3 Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the IT
38、U-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and
39、networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance
40、: international transmission systems, telephone telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and s
41、ignalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems circuits, Printed in Switzerland Geneva, 2001
