1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.953.5 SERIES Q: SWITCHING AND SIGNALLING Digital subscriber Signalling System No. 1 - Stage 3 description for supplementary services using DSS 1 (1 2/99) Stage 3 description for call completion supplementar
2、y services using DSSI : Call Completion on No Reply (CCNR) ITU-T Recommendation Q.953.5 (Previously CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING FUNCTIONS AND INFORMATIO
3、N 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 R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7
4、 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General Data link layer Network layer Ucer-network management Q.1-Q.3 Q.4-Q. 59 Q.60-Q.99 Q.100-Q.119 Q. 120-Q.249 Q.250-Q.309 Q.310-Q.399 Q.400-Q.499 Q.500-Q.599 Q.600-Q.699 Q.700-Q.849 Q.850-Q.999 Q.850-Q.919
5、Q.920-Q.929 Q.930-Q.939 Q. 940-Q. 949 Stage 3 description for supplementary services using DSS 1 Q. 95-Q. 999 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN Q. 1000-Q. 1 O99 Q.1100-Q.1199 Q.
6、1200-Q. 1699 Q. 1700-Q. 1799 Q.2000-Q.2999 For further details, please rer to ITD-T List of Recommendations. ITU-T RECOMMENDATION 4.953.5 STAGE 3 DESCRIPTON FOR CALL COMPLETION SUPPLEMENTARY SERVICES USING DSS1: CALL COMPLETION ON NO REPLY (CCNR) Summary This Recommendation specifies the stage three
7、 of the Call Completion on No Reply (CCNR) supplementary service for the Integrated Services Digital Network (ISDN) at the T reference point or the coincident S and T reference point by means of the Digital Subscriber System No. 1 (DSS1) protocol. Stage three identifies the protocol procedures and s
8、witching functions needed to support a telecommunication service. The CCNR supplementary service enables a calling user A, encountering a destination B which does not answer the call (No Reply), to be notified, when the destination B becomes not busy after having initiated an activity. If user A des
9、ires, then the network will reinitiate the call to the specified destination B. This Recommendation includes an electronic attachment containing the SDL diagrams in reprocessable SDT format. Source ITU-T Recommendation 4.953.5 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under t
10、he WTSC Resolution No. 1 procedure on 3 December 1999. Recommendation 4.953.5 (12/99) 1 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (U-T) is a permanent organ of the
11、 ITU. The U-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 every four years, establishes the t
12、opics 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 ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purvie
13、w, 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 The ITU draws at
14、tention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The U takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by U members or oth
15、ers outside of the Recommendation development process. As of the date of approval of this Recommendation, the U 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 repres
16、ent the latest information and are therefore strongly urged to consult the TSB patent database. o mu 2000 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 fiom the ITU. 11 Recommendation 4.953.5 (12/99) CONTENTS 1 2 3 4 5 6 6.1 6.2 6.3 7 8 8.1 8.2 9 9.1 9.2 10 Scope . References . Definitions Abbreviations Description Operational requirements Requirements on the originating network side . Requirements on the destination network side . Coding r
18、equirements . Provisiodwithdrawal State definitions User states . Network states . Signalling procedures at the coincident S and T reference point Procedures at the served users interface . 9.1.1 Activation 9.1.2 Deactivation . 9.1.3 General interrogation . 9.1.4 Particular interrogation 9.1.5 Recal
19、l indication 9.1.6 CCNR call request . 9.1.7 CCNR call establishment . 9.1.8 Network initiated deactivation procedures 9.1.9 BfieebutAbusyprocedure 9.1.1 O User A monitoring procedure 9.1.1 1 Call information retention . 9.1.12 Basic call information and compatibility checking . Procedures at the re
20、mote users interface 9.2.1 Acceptance of a CCNR request . 9.2.2 CCNR queue processing 9.2.3 Determination of user B Cee . 9.2.4 CCNR call Procedures for interworking with private ISDNs . Recommendation 4.953.5 (12/99) Page 1 1 2 4 4 5 5 5 5 6 8 8 8 9 9 9 12 12 13 13 14 14 15 15 16 17 18 18 18 18 19
21、19 19 . 111 10.1 10.2 11 11.1 12 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 12.10 Procedures for the originating T reference point 1 O . 1.1 CCNR available indication 1 O . 1.2 CCNR supplementary service request . 1 O . 1.3 Remote user free indication . 1 O . 1.4 Suspend request . 1 O . 1.5 Resume
22、 request 1 O . 1.6 CCNR call establishment . 1 O . 1.7 Deactivation . Procedures for the destination T reference point 10.2.1 CCNR available indication 10.2.2 CCNR supplementary service request . 10.2.3 Remote user free indication . 10.2.4 Suspend request . 10.2.5 Resume request 10.2.6 CCNR call est
23、ablishment . 10.2.7 Deactivation . Interactions with other networks . Interaction with non-ISDNs Interaction with other supplementary services Call Waiting (CW) Explicit Call Transfer (ECT) Connected Line Identification Presentation (COLP) Connected Line Identification Restriction (COLR) Calling Lin
24、e Identification Presentation (CLIP) . 12.5.1 Coding requirements 12.5.2 12.5.3 Procedures for interworking with private ISDNs Calling Line Identification Restriction (CLIR) . Procedures at the coincident S and T reference point 12.6.1 Coding requirements Procedures at the coincident S and T referen
25、ce point 12.6.2 12.6.3 Procedures for interworking with private ISDNs Closed User Group (CUG) Conference Calling (CONF) . Direct-Dialling-In (DDI) . Call diversion (call forwarding) services 12.1 O . 1 Call Forwarding Busy (CFB) . 12.10.2 Call Forwarding No Reply (CFNR) . Page 20 20 20 21 21 21 21 2
26、1 22 22 22 23 23 23 23 23 23 23 24 24 24 24 24 24 24 24 24 24 24 25 25 26 26 26 26 26 26 iv Recommendation 4.953.5 (12/99) 12.11 12.12 12.13 12.14 12.15 12.16 12.17 12.18 12.19 12.20 12.21 12.22 12.23 12.24 12.25 12.26 13 14 12.10.3 Call Forwarding Unconditional (CFU) 12.10.4 Call Deflection (CD) .
27、Line Hunting (LH) Three-Party Service (3PY) . User-to-User Signalling (UUS) . Multiple Subscriber Number (MSN) 12.14.1 Coding requirements 12.14.2 Signalling procedures at the coincident S and T reference point 12.14.3 Procedures for the remote network Call Hold (HOLD) Advice of Charge (AOC) Sub-add
28、ressing (SUB) Terminal Portability (TP) Completion of Calls to Busy Subscriber (CCBS) . 12.19.1 Coding requirements 12.19.2 Signalling procedures at the coincident S and T reference point Malicious Call Identification (MCID) Reverse Charging (REV) Multi-Level Precedence and Preemption (MLPP) Support
29、 of Private Numbering Plan (SPNP) . International Telecommunication Charge Card (ITCC) . Global Virtual Network Services (GVNS) . Call Completion on No Reply (CCNR) Parameter values (timers) . Dynamic description (SDLs) Appendix I . Signalling flows . Electronic attachment: SDL diagrams in reprocess
30、able SDT format Page 26 26 26 26 27 27 27 27 27 28 28 28 28 28 28 28 29 29 29 29 29 29 29 29 30 75 Recommendation 4.953.5 (12/99) V Recommendation 4.953.5 STAGE 3 DESCRIPTION FOR CALL COMPLETION SUPPLEMENTARY SERVICES USING DSS1: CALL COMPLETION ON NO REPLY (CCNR) (Geneva, 1999) 1 Scope This Recomme
31、ndation specifies the stage three of the completion of calls on no reply (CCNR) supplementary service for the Integrated Service Digital Network (ISDN) at the T reference point or coincident S and T reference point (as defined in Recommendation 1.41 1 1 i) by means of the Digital Subscriber System N
32、o. 1 (DSS1) protocol. Stage three identifies the protocol procedures and switching functions needed to support a telecommunication service (see Recommendation 1.130 12). In addition, this Recommendation specifies the protocol requirements at the T reference point where the service is provided to the
33、 user via an intermediate private ISDN. This Recommendation does not specifj the additional protocol requirements where the service is provided to the user via a telecommunication network that is not an ISDN. The CCNR supplementary service enables a calling user A, encountering a destination B which
34、 does not answer the call (No Reply), to be notified, when the destination B becomes not busy after having initiated an activity. If user A desires, then the network will reinitiate the call to the specified destination B. The CCNR supplementary service is applicable to all circuit-switched basic te
35、lecommunication services with the following exceptions: a) call 2 of the videotelephony teleservice (see Recommendation F.721) 16; b) all other circuit-switched telecommunication services requiring the use of more than one B-channel. Further parts of this Recommendation shall specifj the method of t
36、esting required to identifj conformance to this Recommendation. This Recommendation is applicable to equipment, supporting the CCNR supplementary service, to be attached at either side of the T reference point or coincident S and T reference point when used as an access to the public ISDN. 2 Referen
37、ces 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. All Recommendations and other references are subject to revision; all us
38、ers 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 is regularly published. 11 ITU-T Recommendation 4.93 1 (1998), ISDN use
39、r-network interface layer 3 speczjkation for basic call control. This Recommendation includes an electronic attachment containing the SDL diagrams in reprocessable SDT format. Recommendation 4.953.5 (12/99) 1 ITU-T Recommendation 4.932 (1998), Digital subscriber signalling system No. 1 - Generic pro
40、cedures for the control of ISDN supplementary services. ITU-T Recommendation I. 1 12 (1 993), Vocabulary of terms for ISDNs. ITU-T Recommendation 1.2 1 O (1 993), Principles of telecommunication services supported by an ISDN and the means to describe them. ITU-T Recommendation E. 164 (1997), The int
41、ernational public telecommunication numbering plan. ITU-T Recommendation 1.22 1 (1 993), Common specijk characteristics of services. CCITT Recommendation 4.9 (1988), Vocabulary of switching and signalling terms. CCITT Recommendation X.208 (1988), Speczjkation of Abstract Syntax Notation One (ASN. 1)
42、. ISOhEC 8824: 1990, Information technology - Open Systems Interconnection - Speczjkation of Abstract Syntax Notation One (ASN. 1). CCITT Recommendation X.2 19 (1 988), Remote operations: Model, notation and service deflnition. ISOhEC 9072-1 : 1989, Information processing systems - Text communicatio
43、n - Remote operations - Part 1: Model, notation and service deflnition. ITU-T Recommendation Z. 1 O0 (1 993), CCITT Speczjkation and description language (SDL) . ITU-T Recommendation 1.41 1 (1993), ISDN user-network inteflaces - Reference conflgurations. CCITT Recommendation I. 130 (1988), Method fo
44、r the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN. ITU-T Recommendation 1.253.4 (1 996), Call completion supplementary services: Completion of calls on no reply (CCNR). ITU-T Recommendation 4.953.3 (1997), Stage 3 description for call compl
45、etion supplementary services using DSSl: Completion of Calls to Busy Subscribers (CCBS). ITU-T Recommendation 4.733.5 (1999), Stage 3 description for call completion supplementary services using Signalling System No. 7: Completion of Calls on No Reply (CCNR) . CCITT Recommendation F.72 1 (1 992), Vi
46、deotelephony teleservice for ISDN. Definitions This Recommendation defines the following terms: 3.1 user at destination B either: - - - - clears an outgoing call. 3.2 Busy: See 2.1h.221 6. 3.3 Activity: The activity condition applies, if at least one CCNR request is in queue B and any initiates an o
47、utgoing call with a SETUP message; or answers an incoming call with a CONNECT message; or clears an established call; or Call: See 2.2/Q.9 7, definition 2201. 2 Recommendation 4.953.5 (12/99) 3.4 Call information retention: A procedure of networkA to store the call information of a specific call so
48、that it can be used for that call. 3.5 Call state: A state as defined in 2.UQ.931 i for either the user or the network as appropriate. A call state may exist for each call reference value (and for each additional responding CE1 in the incoming call states). 3.6 CCNR busy: Any one of the following co
49、nditions will cause a CCNR busy condition: - maximum number of calls reached; - no B-channels available at user A; - CCNR or CCBS recall pending on user A. 3.7 CCNR call: A call which is established under the control of the CCNR supplementary service. 3.8 CCNR recall: The procedure where user A is requested to complete the communication when user B ceases to be busy after having initiated an activity. 3.9 CCBS request retention: If an attempt to establish a CCNR call fails because the destination is busy, then the network provider option “CCBS request retention“
