1、STD-ITU-T RECMN Qn953.3-ENGL 1997 I 4862591 0643236 737 I INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.953.3 SERIES Q: SWITCHING AND SIGNALLING Digital subscriber Signalling System No. i - Stage 3 description for supplementary services using DSS 1 (06
2、/97) Stage 3 description for call completion supplementary services using DSS I: Completion of Calls to Busy Subscribers (CCBS) ITU-T Recommendation Q.953.3 (Previously CCITT Recommendation) STD-ITU-T RECMN -953.3-ENGL 1997 E 4b2591 ObY3237 b75 I ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLI
3、NG SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND S EMI-AUTOMATIC WORK1 NG 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 SPECIF
4、ICATIONS 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 connection control part (SCCP) Telephone user part (TUP) ISDN supplementary serv
5、ices Data user part Signalling System No. 7 management ISDN user part Transaction capabilities application part Test specification Q3 interface General Data link layer Network layer User-network management DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. I Q . I -Q.3 Q .4-Q. 59 Q.60-Q.99 Q. I 004. I 1 9 Q.2
6、50-Q.309 Q.120-Q.249 Q.31 O-Q ,399 Q.400-Q.499 Q. 500-Q. 599 Q.600-Q.699 Q.700-Q.849 Q.700 Q. 70 1 -Q. 709 Q.711-Q.719 Q.720-Q.729 Q.730-Q.739 Q. 740-Q. 749 Q.750-Q.759 Q. 7604 769 Q.770-Q.779 Q.780-Q.799 Q.800-Q.849 Q .850-Q. 999 Q.850-Q.919 Q.920-Q.929 Q.930-Q.939 Q.940-Q.949 11 Stage 3 descriptio
7、n for supplementary services using DSS 1 Q.950-Q.999 11 PUBLIC LAND MOBILE NETWORK Q. 1000-Q. 1 O99 INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN Q. 11 OO-Q. 1 199 Q. 1200-Q. 1999 Q.2000-Q.2999 For further details, please refer to ITU-T List of Recommendations. STDOIT
8、U-T RECMN Q-953-3-ENGL L997 4B6259L Ob43238 501 I ITU-T RECOMMENDATION Q.953.3 STAGE 3 DESCRIPTION FOR CALL COMPLETION SUPPLEMENTARY SERVICES USING DSS 1: COMPLETION OF CALLS TO BUSY SUBSCRIBERS (CCBS) Summary This Recommendation specifies the stage three of the Completion of Calls to Busy Subscribe
9、rs (CCBS) supplementary service for the Integrated Services Digital Network (ISDN) at the T reference point or coincident S and T reference point by means of the Digital Subscriber Signalling System No. 1 (DSS 1) protocol. Stage three identifies the protocol procedures and switching functions needed
10、 to support a telecommunication service. The CCBS Supplementary service enables a calling user A, encountering a busy destination By to be notified when the busy destination B becomes not-busy and to have the service provider reinitiate the call to the specified destination By if user A desires. The
11、 CCBS supplementary service is applicable to all circuit-switched basic telecommunication services using one B-channel. Source ITU-T Recommendation 4.953.3 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 5th of June 1997. FOREWORD IT
12、U (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing
13、 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 their turn, produce Recommendations on thes
14、e 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 purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this
15、 Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RTGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may invol
16、ve the use of a claimed Intellectual Property Right. The 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 R
17、ecommendation, the 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 represent the latest information and are therefore strongly urged to consult the TSB patent dat
18、abase. 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 photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation 4.953.3 (06/97) STDeITU-T RECMN Q-953-3-ENGL 199
19、7 S 4b25L Ob43290 LbT m CONTENTS 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.1 1 3.12 Scope References Definitions Abbreviations . Description . Operational requirements . 3.6.1 Provision/withdrawal 3.6.2 Requirements on the originating network side 3.6.3 Requirements on the destination network side
20、Coding requirements State definitions 3.8.1 User states . 3.8.2 Network states . Signalling procedures at the coincident S and T reference point . 3.9.1 Procedures at the served users interface . 3.9.2 Procedures at the remote users network interface Procedures for interworking with private ISDNs .
21、3.1 O . 1 Procedures for the originating T reference point . 3.10.2 Procedures for the destination T reference point . Interactions with other networks 3.1 1.1 Interactions with non-ISDNs . Interactions with other supplementary services 3.12.1 3.12.2 3.12.3 3.12.4 3.12.5 3.12.6 3.12.7 3.12.8 3.12.9
22、Call Waiting (CW) Explicit Call Transfer (ECT) . Connected Line Identification Presentation (COLP) Connected Line Identification Restriction (COLR) Calling Line Identification Presentation (CLIP) . Calling Line Identification Restriction (CLIR) . Closed User Group (CUG) Conference calling (CONF) Dir
23、ect-Dialling-In (DDI) . 3.12.1 O Call diversion (call forwarding) services 3.12.1 1 Line Hunting (LH) 3.12.13 User-to-User Signalling (UUS) . 3.12.14 Multiple Subscriber Number (MSN) . 3.12.12 Three-Party service (3PTY) Recommendation 4.953.3 (06/97) Page 1 1 2 3 4 4 4 5 5 5 10 10 10 11 11 21 24 24
24、27 31 31 31 31 31 31 31 32 32 34 35 35 35 35 35 35 36 . 111 STD=ITU-T RECMN Q.953.3-ENGL 1997 4862593 Ob43243 OTb 3.12.15 Call Hold (HOLD) 3.12.16 Advice of Charge (AOC) 3.12.17 Sub-addressing (SUB) . 3.12.1 8 Terminal Portability (TP) 3.12.19 Completion of Calls to Busy Subscribers (CCBS) . 3.12.20
25、 Malicious Call Identification (MCID) . 3.12.2 1 Reverse charging (REV) . 3.12.22 Multi-level Precedence and Preemption (MLPP) . 3.12.23 Support of Private Numbering Plan (SPNP) . 3.12.24 International Telecommunication Charge Card (ITCC) . 3.12.25 Global Virtual Network Service (GVNS) . 3.13 Parame
26、ter values (Timers) 3.14 Dynamic description (SDLs) Appendix I . Signalling flows . Page 37 37 37 35 38 35 38 35 38 38 38 38 39 76 iv Recommendation 4.953.3 (06/97) STD-ITU-T RECMN Q.953.3-ENGL 1997 W 4862591 Ob43242 T32 I Recommendation Q.953.3 STAGE 3 DESCRIPTION FOR CALL COMPLETION SUPPLEMENTARY
27、SERVICES USING DSS 1: COMPLETION OF CALLS TO BUSY SUBSCRIBERS (CCBS) (Geneva, I997) 3.1 Scope This Recommendation specifies the stage three of the Completion of Calls to Busy Subscribers (CCBS) supplementary service for the Integrated Services Digital Network (ISDN) at the T reference point or coinc
28、ident S and T reference point (as defined in Recommendation 1.41 1 i i) by means of the Digital Subscriber Signalling System No. 1 (DSS 1) protocol. Stage three identifies the protocol procedures and switching functions needed to support a telecommunication service (see Recommendation 1.130 12). In
29、addition, this Recommendation specifies the protocol requirements at the T reference point where the service is provided to the 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 telecommuni
30、cations network that is not an ISDN. The CCBS supplementary service enables a calling user A, encountering a busy destination By to be notified when the busy destination B becomes not-busy and to have the service provider reinitiate the call to the specified destination B, if user A desires. The CCB
31、S supplementary service is applicable to all circuit-switched basic telecommunication services using one B-channel. Further parts of this Recommendation shall spec the method of testing required to identifj conformance to this Recommendation. This Recommendation is applicable to equipment, supportin
32、g CCBS supplementary service, to be attached at either side of a T reference point or coincident S and T reference point when used as an access to the public ISDN. 3.2 References The following ITU-T Recommendations, and other references contain provisions which, through reference in this text, const
33、itute 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 investigate the possibility of applying the most recent edition of th
34、e Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. i ITU-T Recommendation Q.93 1 (1993), ISDN user-network interface layer 3 specijkation for basic call control. 2 ITU-T Recommendation 4.932 (1993), Generic procedures for
35、the control of ISDN supplementary services. 3 ITU-T Recommendation I. 1 12 (1 993), Vocabulary of terms for ISDNs. 4 ITU-T Recommendation 1.2 1 O (1993), Principles of telecommunication services supported by an ISDN and the means to describe them. Recommendation 4.953.3 (06/97) 1 STD-ITU-T RECMN Q-9
36、53.3-ENGL 1997 I 48b2591 Ob43243 777 D ITU-T Recommendation E. 164 (1 997), The international public telecommunication numbering plan. ITU-T Recommendation 1.22 1 (1 993), Common speciJic characteristics of services. CCITT Recommendation Q.9 (1988), Vocabulary of switching and signalling terms. CCIT
37、T Recommendation X.208 (1 988), Specfzcation of Abstract Syntax Notation One (ASN. I). CCITT Recommendation X.219 (1 988), Remote operations: Model, notation and service definition. ITU-T Recommendation 2.1 O0 (1 993), CCITT Specfzcation and Description Language (SDL) . ITU-T Recommendation 1.41 1 (
38、1993), ISDN user-network interfaces - Reference configurations. CCITT Recommendation 1.130 (1988), Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN. Definitions This Recommendation defines the following terms. 3.3.1 integrated ser
39、vices digital network (ISDN): See 2.31I.112 3, definition 308. 3.3.2 service; telecommunication service: See 2.2A. 1 12 3, definition 201. 3.3.3 supplementary service: See 2.411.210 4. 3.3.4 existing service: The basic telecommunication service associated with speech, 3.1 kHz audio and 64 kbitls unr
40、estricted bearer capabilities. In case of fallback, the lowest priority bearer capability shall count. 3.3.5 ISDN number: A number conforming to the numbering plan and structure specified in Recommendation E. 164 5. 3.3.6 busy: See clause 3A.221 6. 3.3.7 free: User Bs condition when it is neither bu
41、sy nor channels busy. 3.3.8 call: See 2.2/Q.9 7, definition 2201. 3.3.9 CCBS call: A call which is established under the control of the CCBS supplementary service. 3.3.10 destination B: The entity addressed in the original call. 3.3.11 user: The DSS 1 protocol entity at the user side of the user-net
42、work interface. 3.3.12 user A: The user, at the coincident S and T reference point, who originated the call and to whom the CCBS supplementary service is provided. 3.3.13 user B: The remote user, at the coincident S and T reference point, which is identified as destination B. 3.3.14 network A: The n
43、etwork, at the coincident S and T reference point, to which user A is attached. 3.3.15 network B: The network, at the coincident S and T reference point, which is identified as destination B. 2 Recommendation 4.953.3 (06/97) STD-ITU-T RECMN Q-753.3-ENGL 1777 D Y862591 ObY32YY 805 D 3.3.16 network: T
44、he DSS 1 protocol entity at the network side of the user-network interface. 3.3.17 public network: The DSS 1 protocol entity at the network side of the user-network interface at the T reference point. 3.3.18 private network: The DSS 1 protocol entity at the user side of the user-network interface at
45、 the T reference point. 3.3.19 originating network: The network at the served user. 3.3.20 destination network The network at the remote user. 3.3.21 CCBS busy: Any one of the following conditions will cause a CCBS busy condition: - maximum number of calls reached; - interface information channels u
46、navailable; - CCBS recall pending on user A. 3.3.22 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). 3.3.23 CCBS recall: A networ
47、k to user indication, informing user A that: 4 destination B is free; and b) the network is ready to initiate a CCBS call to destination B and that the network is awaiting a response to this indication from user A. 3.3.24 CCBS request retention: If an attempt to establish a CCBS call fails because t
48、he destination is busy again, then the retention option defines whether the CCBS supplementary service shall continue or not, i.e. if the retention option is supported, the original CCBS request shall retain its position in the user B queue, and monitoring of user B shall continue. Note that retenti
49、on option is performed only when both the originating network and the destination network support CCBS request retention. 3.3.25 invoke component: See 8.2.3.1.1/Q.932 2. Where reference is made to an “XXXXI invoke component, an invoke component is meant with its operation value set to the value of the operation I1XXXXI. 3.3.26 return result component: See 8.2.3.1.UQ.932 2. Where reference is made to an “xxxx“ return result component, a return result component is meant which is related to an “xxxx“ invoke component. 3.3.27 return error component: Se
