1、STD-ITU-T RECMN Q*?bZ-ENGL L999 Y8b2591r Ob85852 854 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STAN DARD IZATIO N SECTOR OF ITU Q.762 (1 2/1999) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 - ISDN user part Signalling System No. 7 - ISDN User Part
2、general functions of messages and signals ITU-T Recommendation Q.762 (Formerly CCITT Recommendation) STDaITU-T RECMN Q-762-ENGL 1799 48b2571 Ob85853 790 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANU AL SERVICE FUNCTIONS AND INFORMATION FLOWS FOR SERVICE
3、S IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R 1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 INTERNATIONAL AUT
4、OMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General Message transfer part (MTP) Signalling connection control part (SCCP) Telephone user part (TUP) ISDN supplementary services Data user pari Signalling System No. 7 management SDN user part Transaction capabilities
5、application part Test specification 43 interface DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK MTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q. 1-4.3 Q.4-Q.59 Q.6O-Q.99 Q.100-Q.119 Q. 120-Q.249
6、Q.250-Q.309 4.3 10-Q.399 Q.40O-Q.499 QSOO-Q.599 4.600-4.699 Q.70O-Q.849 Q.700 Q.71l-Q.719 Q.72O-Q.729 Q.730-4.739 Q.74O-Q.749 4.750-4.759 Q.160-Q.769 Q.77O-Q.779 Q.78O-Q.799 Q.80O-Q.849 Q.85O-Q.999 Q. 1 OOO-Q. 1099 Q. 1 10O-Q. 1 199 Q.120-Q.1699 Q.170O-Q.1799 Q.200O-Q.2999 Q.70 1-4.709 For further d
7、etails, please refer to the list of ITV-T Recommendations. ITU-T Recommendation Q.762 Signalling System No. 7 - ISDN User Part general functions of messages and signals Summary This ITU-T Recommendation describes the messages, parameters and the signalling information contained within parameters use
8、d by the ISDN user part protocol, and their function. Source ITU-T Recommendation Q.762 was prepared by ITU-T Study Group 11 (1997-2000) and approved under the WTSC Resolution 1 procedure on 3 December 1999. FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized a
9、gency in the field of telecommunications. The IT Telecommunication Standardization 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 worldwid
10、e 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 these The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolu
11、tion I. 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. topics. NOTE In this Recommendation, the expression ”Administration” is used for conciseness to indicate both a telecommunication administ
12、ration 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 Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicabil
13、ity 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, IT had not received notice of intellectual property, protected by patents, which may be required to implement t
14、his 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 reserved. No part of this publication may be reproduced or utilized in any form or by any means, elect
15、ronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 1 1.1 1.2 1.3 1.4 2 4 STDeITU-T RECMN Q.762-ENGL 1999 Li862591 0685856 4TT CONTENTS General . Scope References Terms and definitions . Abbreviations . Signalling messages Signalling parameters . 7
16、Parameter information 12 STD-ITU-T RECMN Ql7b2-ENGL 1999 4862591 Ob85857 33b ITU-T Recommendation Q.762 Signalling System No. 7 - ISDN User Part general functions of messages and signals 1 General 1.1 Scope This ITU-T Recommendation describes the elements of signalling information used by the ISDN u
17、ser part protocol and their function. The encoding of these elements, the format of the messages in which they are conveyed, and an indication of whether or not they are for national use, are described in ITU-T Recommendation Q.763 i. 1.2 References The following ITU-T Recommendations and other refe
18、rences 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 encouraged to
19、 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. ITU-T Recommendation 4.763 (1 999), Signalling System No. 7 - ISDN user part formats and codes. CCITT
20、 Recommendation 4.28 (1 988), Determination of the moment of the called subscriber% answer in the automatic service. CCITT Recommendation E.260 (1 988), Basic technical problems concerning the measurement and recording of call durations. CCITT Recommendation Q.1 O1 (1 988), Facilities provided in in
21、ternational semi-automatic working. ITU-T Recommendation Q. 12 18 (1 995), Interface Recommendation for intelligent network cs-I. ITU-T Recommendation Q. 1228 (1 997), Interface Recommendation for intelligent network (3-2. ITU-T Recommendation E.412 (1 998), Network management controls. ITU-T Recomm
22、endation Q.850 (1998), Use of cause and location in the digital subscriber Signalling System No. 1 and Signalling System No. 7 ISDN user part. CCITT Recommendation X.229 (1 988), Remote Operations: Protocol specifzcation. ITU-T Recommendation X. 12 1 (1 996), International numbering plan for public
23、data networks. CCITT Recommendation E.2 12 (I 988), Identjjcation plan for land mobile stations. ITU-T Recommendation Q.704 (1 996), Signalling networkfinctions and messages. Terms and definitions See clauses 2 to 4. - - - STDmITU-T RECMN Q-7b2-ENGL 1777 4862573 0685858 272 H 1.4 Abbreviations This
24、ITU-T Recommendation uses the following abbreviations: APP ASE AT11 CCBS CCNR CCSS DNIC ECT GVNS ID IN ISC LFB MCID MLPP MNIC PDU QoR ROER ROIV RON RORS SCCP SCF SLR UID Application Transport Parameter Application Service Element Application Transport Instruction Indicators Completion of Calls to Bu
25、sy Subscriber Completion of Calls on No Reply Call Completion Service Setup Data Network Identification Code Explicit Call Transfer Global Virtual Network Service Identifier Intelligent Network International Switching Centre Look For Busy Malicious Call Identification Multilevel Precedence and Pre-e
26、mption Mobile Network Identification Code Protocol Data Unit Query on Release Remote Operation Error Remote Operation Invoke Remote Operation Reject Remote Operation Result Signalling Connection Control Part Service Control Function Segmentation Local Reference User Interactive Dialogue WGS-84 World
27、 Geodetic System 1984 Table 1 defines the acronyms used for ISDN user part messages. - - STD*ITU-T RECMN Q.7bZ-ENGL 1999 4862593 Ob85859 LO9 = Table UQ.762 - ISDN user part message acronyms Acronym CM NM .PM LA IL0 CR :FN GB :GBA :GU :GUA :ON :OT :PG :RG :QM :QR )RS :AA :AC :AR :OT :RJ ;RA 3RS AM ID
28、R RS NF NR LPA LOP NRM OLM PAM PIU REL RES RLC RSC SAM SDM SGM sus UBL UBA UCIC UPA UPT USR Message ,ddress complete Answer Lpplication transport 1 locking acknowledgement blocking :ontinuity check request :onfusion huit group blocking hxit group blocking acknowledgement huit group unblocking huit g
29、roup unblocking acknowledgement :onnect 2ontinuity :all progress 2harge information huit group query kcuit group query response lelayed release (reserved - used in 1988 version) acility accepted acility Facility request Forward transfer Facility reject Circuit group reset acknowledgement Circuit gro
30、up reset initial address identification request identification response Information Information request Loop back acknowledgement Loop prevention Network resource management Overload Pass-along Pre-release information Release Resume Release complete Reset circuit Subsequent address Subsequent direct
31、ory number Segmentation Suspend Unblocking Unblocking acknowledgement Unequipped circuit identification code User part available User part test User-to-user information STD*ITU-T RECMN Q-762-ENGL 1999 4862593 0685860 720 2 Signalling messages 2.1 Address Complete Message (ACM): A message sent in the
32、 backward direction indicating that all the address signals required for routeing the call to the called party have been received. 2.2 Answer message (ANM): A message sent in the backward direction indicating that the call has been answered. In semi-automatic working, this message has a supervisory
33、function. In automatic working, this message is used in conjunction with charging information in order to: - start metering the charge to the calling subscriber (see Recommendation Q.28 2); and - start measurement of call duration for international accounting purposes (see Recommendation E.260 3). 2
34、.3 Application Transport message (APM): A message sent in either direction to convey application information using the Application Transport mechanism. 2.4 Blocking message (BLO): A message sent only for maintenance purposes to the exchange at the other end of a circuit, to cause an engaged conditio
35、n of that circuit for subsequent calls outgoing from that exchange. When a circuit is used in the bothway mode of operation, an exchange receiving the blocking message must be capable of accepting incoming calls on the concerned circuit unless it has also sent a blocking message. Under certain condi
36、tions, a blocking message is also a proper response to a reset circuit message. 2.5 Blocking Acknowledgement message (BLA): A message sent in response to a blocking message indicating that the circuit has been blocked. 2.6 Call Progress message (CPG): A message, sent in either direction during the s
37、etup or active phase of the call, indicating that an event, which is of significance, and should be relayed to the originating or terminating access, has occurred. 2.7 Charge information message (CRG): Information sent in either direction for accounting and/or call charging purposes. 2.8 Circuit Gro
38、up Blocking message (CGB): A message sent to the exchange at the other end of an identified group of circuits to cause an engaged condition of this group of circuits for subsequent calls outgoing from that exchange. An exchange receiving a circuit group blocking message must be able to accept incomi
39、ng calls on the group of blocked circuits unless it has also sent a blocking message. Under certain conditions, a circuit group blocking message is also a proper response to a reset circuit message. 2.9 Circuit Group Blocking Acknowledgement message (CGBA): A message sent in response to a circuit gr
40、oup blocking message to indicate that the requested group of circuits has been blocked. 2.10 circuit Group Reset message (GRS): A message sent to release an identified group of circuits when, due to memory mutilation or other causes, it is unknown whether for example, a release or release complete m
41、essage is appropriate for each of the circuits in the group. If at the receiving end a circuit is remotely blocked, reception of this message should cause that condition to be removed. 2.11 circuit Group Reset Acknowledgement message (GRA): A message sent in response to a circuit group reset message
42、 and indicating that the requested group of circuits has been reset. The message also indicates the maintenance blocking state of each circuit. 2.12 Circuit Group Unblocking message (CGU): A message sent to the exchange at the other end of an identified group of circuits to cause cancellation in tha
43、t group of circuits of an engaged condition invoked earlier by a blocking or circuit group blocking message. STDmITU-T RECMN Q.7bZ-ENGL 1777 W 48b257L Ob858bL 8b7 W 2.13 Circuit Group Unblocking Acknowledgement message (CGUA): A message sent in response to a circuit group unblocking message to indic
44、ate that the requested group of circuits has been unblocked. 2.14 Circuit group Query Message (CQM): A message sent on a routine or demand basis to request the far-end exchange to give the state of all circuits in a particular range. 2.15 Circuit group Query Response message (CQR): A message sent in
45、 response to a circuit group query message to indicate the state of all circuits in a particular range. 2.16 Confusion message (CFN): A message sent in response to any message (other than a confusion message) if the exchange does not recognize the message or detects a part of the message as being un
46、recognized. 2.17 Connect message (CON): A message sent in the backward direction indicating that all the address signals required for routeing the call to the called party have been received and that the call has been answered. 2.18 Continuity message (COT): A message sent in the forward direction i
47、ndicating whether or not there is continuity on the preceding circuit(s) as well as of the selected circuit to the following exchange, including verification of the communication path across the exchange with the specified degree of reliability. 2.19 Continuity Check Request message (CCR): A message
48、 sent by an exchange for a circuit on which a continuity check is to be performed, to the exchange at the other end of the circuit, requesting continuity checking equipment to be attached. 2.20 Facility Accepted message (FAA): A message sent in response to a facility request message indicating that
49、the requested facility has been invoked. 2.21 Facility message (FAC): A message sent in either direction at any phase of the call to request an action at another exchange. The message is also used to carry the results, error or rejection of a previously requested action. 2.22 Facility Reject message (FRJ): A message sent in response to a facility request message to indicate that the facility request has been rejected. 2.23 Facility Request message (FAR): A message sent from an exchange to another exchange to request activation of a facility. 2.24 Forward Transfer messa
