1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.764 (1 2/1999) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 - ISDN user part Signalling system No. 7 - ISDN user part signalling procedures ITU-T Recommendation Q.764 (Former
2、ly CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATI
3、ONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General Message transfer part (MTP) Signalling conn
4、ection control part (SCCP) Telephone user part (TUP) ISDN supplementary services Data user part Signalling System No. 7 management Test specification 43 interface DIGITAL SUBSCRIBER SIGNALLING SYSTEM No, 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK SIGN
5、ALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN Q. 1-4.3 4.4-4.59 4.60-4.99 Q.100-Q.119 Q. 120-4.249 4.250-4.309 4.3 10-4.399 4.400-4.499 Q.500-4.599 4.600-4.699 Q.700-4.849 4.700 4.701-4.709 4.71 1-4.719 4.720-4.729 4.730-4.739 4.740-4.749 0.750-0.759 - - - I_ - 4.770-4.779 4.780-4.79
6、9 Q.SOLQ.849 Q.850-Q.999 Q.1000-Q.1099 Q. 1100-Q. 1 199 Q. 1200-4.1699 Q. 1700-4.1799 Q.2000-4.2999 For further details, please refer to the list of ITU-TRecommendations ITU-T Recommendation 4.764 Signalling system No. 7 - ISDN user part signalling procedures Summary This Recommendation describes th
7、e ISDN User Part signalling procedures of the Set-up and clear down of national and international ISDN connections used for “ISUP 2000“. Actions common for all types of exchanges are described only once. Different or additional actions required in an exchange are specified in a separate subclause ap
8、plicable to that type of exchange. The procedures specified in clause 2 relate to basic call (i.e. calls not involving supplementary services and IN). Source ITU-T Recommendation 4.764 was revised by ITU-T Study Group 11 (1997-2000) and approved under the WTSC Resolution 1 procedure on 3 December 19
9、99. FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions
10、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, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on
11、 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 purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the
12、expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed I
13、ntellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not re
14、ceived notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2001 All rights rese
15、rved. 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 writing from 1TU. CONTENTS 1 1.1 1.2 1.3 1.4 2 2.1 2.2 2.3 2.4 2.5 General . Scope References Definitions Abbreviations .
16、 Basic call control and signalling procedures Successful call set-up 2.1.1 2.1.2 2.1.3 2.1.4 2.1.5 2.1.6 2.1.7 2.1.8 2.1.9 2.1.10 2.1.11 2.1.12 2.1.13 Forward address signalling . En bloc operation . Forward address signalling . Overlap operation . Calling party number . Address complete message or
17、connect message . Call progress (Basic call) Information messages Answer message . ; Continuity-check . Charging Forward transfer message Transit network selection (national use) . Simple segmentation . Procedure for N x 64 kbitls connection type . Unsuccessful call set-up . Actions at exchange init
18、iating a release message Actions at intermediate exchange . 2.2.1 2.2.2 2.2.3 Actions at the controlling exchange (i.e. the exchange controlling the call) 2.2.4 Tones and announcements 2.2.5 Address incomplete . Normal call release . 2.3.1 Release initiated by a calling party 2.3.2 Release initiated
19、 by a called party . 2.3.3 Release initiated by the network . 2.3.4 Storage and release of initial address message information 2.3.5 Pre-release information transport Suspend, resume . 2.4.1 Suspend . 2.4.2 Resume 2.4.3 Expiration of timer (T6) or timer (T38) Signalling procedures for connection typ
20、e allowing fallback Page 1 1 1 2 2 3 3 3 11 17 17 20 21 21 22 23 23 23 24 25 26 26 26 26 26 27 27 27 28 28 28 29 29 29 30 30 30 2.5.1 2.5.2 . Actions in the backward direction - fallback indicated before answer 2.5.3 2.5.4 Actions in the forward direction . Actions in the backward direction - fallba
21、ck indicated at answer Actions in the backward direction - fallback does not occur Propagation delay determination procedure . Echo control signalling procedures 2.7.1 Introduction . 2.7.2 Enhanced echo control signalling procedures . 2.7.3 Simple echo control signalling procedures . 2.7.4 Intenvork
22、ing considerations Automatic repeat attempt . Blocking and unblocking of circuits and circuit groups . Circuit group query (national use) 2.6 2.6.1 Procedure . 2.7 2.8 Network features . 2.8.1 2.8.2 2.8.3 2.9 Abnormal conditions 2.9.1 Dual seizure . 2.9.2 Transmission alarm handling for digital inte
23、r-exchange circuits 2.9.3 Reset of circuits and circuit groups . 2.9.4 Failure in the blockinghnblocking sequence 2.9.5 Receipt of unreasonable signalling information messages . 2.9.6 Failure to receive a “release complete“ message - Timer T1 and T5 . 2.9.7 use) 2.9.8 Other failure conditions . 2.9.
24、9 Temporary Trunk Blocking (TTB) (national use) . ISDN user part signalling congestion control Failure to receive a response to an information request message (national 2.1 O 2.10.1 General 2.10.2 Procedures . 2.11 Automatic congestion control . parameter . Actions taken during overload Unequipped c
25、ircuit identification code message (national use) . ISDN user part availability control . 2.1 1.1 Receipt of a release message containing an automatic congestion level 2.1 1.2 2.12 2.13 2.13.1 General 2.13.2 Procedures . 2.14 MTP pausehesume . 2.15 Overlength messages Page 31 32 33 34 34 34 36 36 37
26、 44 46 46 46 46 50 51 51 53 53 55 55 67 67 67 68 69 69 69 69 70 70 70 71 71 71 72 72 2.16 2.17 2.18 2.19 2.20 Support for Temporary Alternative Routing (TAR) . Actions at the initiating exchange . Actions at an intermediate exchange . Actions at the destination local exchange . Call collect request
27、procedure Support for hard to reach network management functions Exchange initiating HTR indication Exchange receiving HTR indication . Calling geodetic location procedure . Hop counter procedure . 2.17.1 2.17.2 2.17.3 2.19.1 2.19.2 2.20.1 Introduction . 2.20.2 Transfer of geodetic information . Ann
28、ex A . Annex B . Figures on basic call control signalling procedures Annex C . Examples of ech c. control signalling procedures . c.0 c . 1 c.2 c.3 c.4 c.5 C.6 Interworking model Basic call set-up for the case where all exchanges support the enhanced echo control signalling procedures. and have echo
29、 control equipment available . Call Set-up incorporating multiple forwarding for the case where all exchanges support the enhanced echo control signalling procedures. and echo control Basic call Set-up for the case where all exchanges support the enhanced echo control signalling procedures. and echo
30、 control equipment is not available in all exchanges . Interworking with signalling systems in the preceding network that do not support the enhanced echo control logic control signalling procedures C.4.1 Interworking from the simple echo control signalling procedures . C.4.2 Intenvorking from ITU-T
31、 4.764 (1992 version) Intenvorking with signalling systems in the succeeding network that do not support the enhanced echo control logic signalling procedures . C.5.1 Intenvorking to the simple echo control signalling procedures C.5.2 Interworking between an exchange supporting the simple echo contr
32、ol signalling procedures and ITU-T Q.764 (1 992 version) . C.6.1 Intenvorking from an exchange supporting the simple echo control signalling procedures to ITU-T Q.764 (1 992 version) C.6.2 Intenvorking from an exchange using ITU-T Q.764 (1992 version) to an exchange supporting the simple echo contro
33、l signalling procedures equipment is not available in all exchanges . Intenvorking to ITU-T 4.764 (1992 version) . Page 72 72 72 73 73 73 73 74 74 74 74 75 75 79 83 84 84 85 86 86 86 87 88 88 89 90 90 91 Page C.7 Exchanges supporting the enhanced echo control signalling procedures interacting with i
34、ntelligent network entities . Annex D . Examples of signalling procedures for connection type allowing fallback Annex E . Test calls E.l Called number for test calls E.2 Accounting of test calls Annex F . Cause values . Annex G . Start up procedures G . 1 G.2 Initial procedure for putting the first
35、group of circuits into service . Initial procedure for putting additional circuits into service G.3 Test procedures . 92 93 96 96 96 96 96 97 98 98 ITU-T Recommendation 4.764 Signalling system No. 7 - ISDN user part signalling procedures 1 General 1.1 Scope This Recommendation describes the ISDN Use
36、r Part signalling procedures for the set-up and clear down of national and international ISDN connections. Actions common for all types of exchanges are described only once. Different or additional actions required in an exchange are specified in a separate clause applicable to that type of exchange
37、. . The procedures specified in clause 2 relate to basic call (i.e. calls not involving supplementary services). ITU-T 4.761 18 provides an overview of the signalling capabilities of the complete ISDN User Part (both basic and supplementary services). NOTE - In intemational operation the use of en b
38、loc or overlap signalling is based on bilateral agreements. 1.2 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 publication, the editions indicated were valid. A
39、ll 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 of the currently valid ITU-T Recommendations
40、is regularly published. ITU-T D.390 RI (1 988), Accounting system in the international automatic telephone service. ITU-T E. 172 (1 992), ISDN routingplan. ITU-T G. 13 1 (1 996), Control of talker echo. ITU-T G.711 (1988), Pulse code modulation (PCM) of voice frequencies. ITU-T 4.12 (1988), Over-ow
41、- alternative routing - rerouting -automatic repeat attempt. ITU-T Q.33 (1988), Protection against the effects of faulty transmission on groups of circuits. ITU-T Q. 1 O1 (1988), Facilitiesprovided in international semi-automatic working. ITU-T Q. 107 (1 988), Standard sending sequence of forward ad
42、dress information. ITU-T Q. 1 15 (1 999), Logic for the control of echo control devices. (ISUP97). ITU-T Q. 1 18 (1 997), Abnormal conditions - Special release arrangements. ITU-T 4.542 (1993), Digital exchange design objectives - Operations and maintenance. ITU-T 4.543 (1 993), Digital exchange per
43、formance design objectives. ITU-T Q.704 (1 996), Signalling network functions and messages. ITU-T 4.706 (1 993), Message transfer part signalling performance. Withdrawn 1995. ITU-T Q.724 (1 988), Telephone user part signallingprocedures. ITU-T Q.730 (1999), ISDN User Part supplementary services, ITU
44、-T Q.730-series Recommendations, Stage 3 description for ISDN supplementary services. ITU-T Q.761 (1999), Signalling System No. 7 - ISDN User Part, functional description. ITU-T Q.763 (1999), Signalling System No. 7 - ISDN User Part formats and codes. ITU-T 4.766 (1 993), Performance objectives in t
45、he integrated services digital network application. ITU-T Q.767 (1991), Application of the ISDN user part of CCITT Signalling System No. 7 for international ISDN interconnections. ITU-T Q.850 (1998), Usage of cause and location in the digital subscriber Signalling System No. 1 and the Signalling Sys
46、tem No. 7 ISDN userpart. ITU-T E.412 (1 998), Network management controls. ITU-T G.704 (1998), Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbith hierarchical levels. ITU-T E. 141 (1 993), Instructions for operators on the operator-assisted international telephone service.
47、ITU-T Q.733.4 (1993), Terminal Portability (TP). ITU-T Q.73 1.7 (1997), Malicious call identzjkation (MCID). Definitions For the purposes of this Recommendation, definitions of ITU-T 4.761 18 apply. 1.4 Abbreviations This Recommendation uses the following abbreviations. CCR CQM CQR EC ECD ECIB ECIBA
48、 ECIF ECIFA ECRB ECRF HTR IAM IECD INF Continuity Check Request Circuit group Query Message Circuit group Query Response message Echo Control Echo Control Device Echo Control Information Backward Echo Control Information Backward, Additional (ECD availability) Echo Control Information Forward Echo C
49、ontrol Information Forward, Additional (ECD availability) Echo Control Request Backward (OECD request/ECD request) Echo Control Request Forward (OECD request/IECD request) Hard to Reach Initial Address Message Incoming Echo Control Device INFormation Message INR XNformation Request Message ISDN Integrated Services Digital Network 1.a. Incoming Echo Control Device not included but available Incoming Echo Control Device included 1.1. i.n.a. i.n.1. i.n.r. i.r. MCI MTP OECD 0.a. 0.i. 0.n.a. 0.n.i. 0.n.r. 0.r. PCM SAM TAR TDMA TTB Incoming Echo Control Device not available Incoming Echo Con
