ITU-T Q 732 2-5-1999 Stage 3 description for call offering supplementary services using signalling system No 7 Call diversion services - Q 732 5 C Call Deflection (CD) (Study Group.pdf

1、 STD-ITU-T RECMN 8-732-2-5-ENGL 1999 4862593 Ob70139 59T = INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.732.2-5 SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 - ISDN supplementary services (1 2/99) Stage 3 description for

2、 call offering supplementary services using signalling system No. 7: Call diversion services Q.732.2 - Call Forwarding Busy (CFB) Q.732.3 - Call Forwarding No Reply (CFNR) Q.732.4 - Call Forwarding Unconditional (CFU) Q.732.5 - Call Deflection (CD) ITU-T Recommendation Q.732.2-5 (Previously CCITT Re

3、commendation) 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 SPECIFICATIONS OF SIGN

4、ALLING 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 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General Message transfer part (MTP) Signalling connection cont

5、rol part (SCCP) Telephone user part (TUP) rY Data user part Signalling System No. 7 management ISDN user part Transaction capabilities application part Test specification Q3 interface DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK , PUBLIC L

6、AND MOBILE NETWORK SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN Q.1-Q.3 Q.4-Q.59 Q.60-Q.99 Q.lO-Q.119 Q .I 20-Q.249 Q .250-Q.309 Q .3 1 O-Q .399 Q.400-Q.499 Q.500-Q.599 Q.600-Q.699 Q. 700-Q. 849 Q.700 Q.701-Q.709 Q.711-Q.719 Q.720-Q.729 4.750-4.739 Q.740-Q.749 Q .750-Q. 759 Q .7

7、60-Q. 769 Q.770-Q.779 Q.78O-Q.799 Q.800-Q.849 Q .850-Q. 999 Q. 1OOO-Q. 1 O99 Q.lIOeQ.1199 Q. 1200-Q. 1 699 Q.1700-Q.1799 Q.2000-Q.2999 For further details, please refer to ITU-T List of Recommendations. ITU-T RECOMMENDATION Q.732.2-5 STAGE 3 DESCRIPTION FOR CALL OFFERLNG SUPPLEMENTARY SERVICES USING

8、 SIGNALLING SYSTEM No. 7: CALL DIVERSION SERVICES Summary This Recommendation defines the essential functions, procedures and messages required for the transportation of call diversion information. Source ITU-T Recommendation 4.732.2-5 was revised by ITU-T Study Group 11 (1997-2000) and was approved

9、 under the WTSC Resolution No. 1 procedure on 3 December 1999. Recommendation Q.732.2-5 (12/99) i FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent

10、organ of the ITU. The 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 meets every four years, est

11、ablishes the topics 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

12、 ITU-Ts purview, 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 Th

13、e ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve 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

14、ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, 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

15、 this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 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, w

16、ithout permission in writing from the ITU. I 11 Recommendation 4.732.2-5 (12/99) CONTENTS Page 2.1 Introduction . 1 2.1.1 Scope . 1 2.1.2 References 1 2.1.3 Terms and definitions 2 3 2.1.4 Abbreviations . 2.2 Description 4 2.2.1 General description 4 2.2.2 Specific terminology 4 2.2.3 Qualification

17、on the applicability to telecommunication services. 4 2.2.4 State definitions . 4 2.3 Operational requirements 5 2.3.1 Provisiodwithdrawal . 5 2.3.2 Requirements on the originating network side 6 2.3.3 Requirements in the network . 6 2.3.4 Requirements on the terminating network side . 6 2.4 Coding

18、requirements . 6 2.4.1 Messages 7 2.4.2 Parameters . 8 2.5 Signalling requirements 9 2.5,l Activatioddeactivatiodregistration 9 2.5.2 Invocation and operation . 9 2.6 Interactions with other supplementary services 2.6.2 Call transfer services 2.6.3 Connected Line Identification Presentation (COLP) .

19、 2.6.4 Connected Line Identification Restriction (COLR) . 2.6.5 Calling Line Identification Presentation (CLIP). . 2.6.6 Calling Line Identification Restriction (CLIR). . 2.6.7 Closed User Group (CUG) 2.6.1 Call Waiting (CW) . 2.6.8 Conference calling (CONF) . 2.6.9 Direct Dialling-In (DDI) 18 18 18

20、 18 18 18 18 18 19 19 2.6.10 Call diversion services . 19 2.6.11 Line Hunting (LH) . 19 2.6.12 Three Party Service (3PTY) 19 2.6.13 User-to-User Signalling (UUS) . 19 2.6.14 Multiple Subscriber Number (MSN) . 19 2.6.15 Call hold (HOLD) 19 2.6.16 Advice of Charge (AOC) . 19 . Recommendation 4.732.2-5

21、 (12/99) 111 2.7 2.8 2.9 2.10 2.6.17 2.6.18 2.6.19 2.6.20 2.6.21 2.6.22 2.6.23 2.6.24 Sub-addressing (SUB) . Terminal Portability (TP) Completion of Calls to Busy Subscriber (CCBS) Malicious Call Identification (MCID) . Reverse charging (REV) Multi-level Precedence and Preemption (MLPP) Private Numb

22、ering Plan (PNP) International telecommunication charge card Interactions with other networks . 2.7.1 Interactions with networks not providing any call diversion information . 2.7.2 Interactions with private ISDNs Signalling flows Dynamic description . Parameter values (timers) . Page 19 19 19 20 20

23、 20 20 20 20 20 20 20 34 34 iv Recommendation Q.732.2-5 (12/99) Recommendation 4.732.2-5 STAGE 3 DESCRIPTION FOR CALL OFFERING SUPPLEMENTARY SERVICES USING SIGNALLING SYSTEM No. 7: CALL DIVERSION SERVICES (revised in 1999) Q.732.2 Call forwarding busy 2.1 Introduction This Recommendation describes t

24、he stage 3 of the call offering supplementary service for the Integrated Services Digital Network (ISDN), by means of the signalling system No. 7 ISDN user part (ISUP). 2.1.1 Scope The diversion supplementary service comprises the following services: - Call Forwarding Busy (CFB); - - Call Forwarding

25、 Unconditional (CFU); - Call Deflection (CD). The call forwarding busy (CFB) supplementary service permits a served user to have the network send all incoming calls, or just those associated with a specific basic service, which meet busy condition and are addressed to the served users ISDN number to

26、 another number. The served users originating service is unaffected. The busy condition may be either network determined or user determined. The call forwarding no reply (CFNR) supplementary service permits a served user to have the network send all incoming calls, or just those associated with a sp

27、ecific basic service, which meet no reply and are addressed to the served users ISDN number to another number. The served users originating service is unaffected. The call forwarding unconditional (CFU) supplementary service permits a served user to have the network send all incoming calls, or just

28、those associated with a specific basic service, addressed to the served users ISDN number to another number. The served users originating service is unaffected. If this service is activated, calls are forwarded no matter what the condition of the termination. The call deflection (CD) supplementary s

29、ervice allows the served user to respond to an incoming call offered by the network by requesting redirection of that call to another number specified in the response. This redirection is only allowed before the called user has answered the call. It may occur immediately as a response to the DSS 1 S

30、et-up message of the access or during the alerting phase. Call Forwarding No Reply (CFWR); 2.1.2 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

31、 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 the Recommendations and other references listed below. A list of the curre

32、ntly valid ITU-T Recommendations is regularly published. 11 ITU-T Recommendation I. 1 12 (1993), Vocabulary oftermsfor ISDNs. Recommendation 4.732.2-5 (12/99) 1 2 CCITT Recommendation 1.130 (1988), Method for the characterization of telecommunication services supported by an ISDN and network capabil

33、ities of an ISDN. 3 ITU-T Recommendation 1.2 1 O (1993), Principles of telecommunication services supported by an ISDN and the means to describe them. 4 CCITT Recommendation 1.250 (1 988), Dejnition ofsupplementary services. 5 CCITT Recommendation 1.252 (1988), Call offering supplementary services.

34、6 CCITT Recommendation 1.252.2 (1 992), Call oflering supplementary services: Call forwarding busy. 7 CCITT Recommendation 1.252.3 (1 992), Call offering supplementary services: Call forwarding no reply. 8 CCITT Recommendation 1.252.4 (1992), Call oflering supplementary services: Call forwarding unc

35、onditional. 9 CCITT Recommendation 1.252.5 (1 992), Call offering supplementary sewices: Cull deflection. 101 CCITT Recommendation Q.80 (1988), Introduction to stage 2 service descriptions for supplementary services. 1 13 ITU-T Recommendation 4.82.2 (1993), Stage 2 description for call offering supp

36、lementary services: Call forwarding. 121 ITU-T Recommendation 4.730 (1999), ISDN user part supplementary services. 13 ITU-T Recommendations Q.731.3 to Q.731.5 (1993), Stage 3 description for number identification supplementary services using signalling system No. 7. 14 ITU-T Recommendation Q.761 (19

37、99), Signalling system No. 7 - ISDN user part - Functional description. 151 ITU-T Recommendation 4.762 (1 999), Signalling system No. 7 - ISDN user part - General functions of messages and signals. 161 ITU-T Recommendation Q.763 (1 999), Signalling system No. 7 - ISDN user part - Formats and codes.

38、17 ITU-T Recommendation 4.764 (1999), Signalling system No. 7 - ISDN user part - Signalling procedures. 18 ITU-T Recommendation Q.952 (1993), Stage 3 service description for call offering supplementary services using DSS 1 - Diversion supplementary services. 191 ITU-T Recommendation Q. 1 15 (1 999),

39、 Logic for the control of echo control devices. 2.1.3 Terms and definitions This Recommendation defines the following terms. 2.1.3.1 calling user: The user who initiated the call that is diverted. All procedures at the calling user are provided as part of the basic service; the calling user need not

40、 have subscribed to any specific diversion supplementary service. 2.1.3.2 call forwarding may occur indicator: Information sent in the backward direction indicating that call forwarding may occur, depending on the response received (or lack thereof) from the called party. 2.1.3.3 deflected-to user:

41、The user, to which the call shall be deflected. 2 Recommendation 4.732.2-5 (12/99) 2.1.3.4 forwarded-to user: The user to which a call is to be forwarded. All procedures at the forwarded-to user are provided as part of the basic service; the forwarded-to user need not have subscribed to any specific

42、 call forwarding supplementary service (e.g. CFU, CFB, CFNR). 2.1.3.5 network determined user busy (NDUB) is specified (see 2.1.4h.221): - if all the appropriate user-network interface information channels are busy and either the network does not support the offering of additional calls beyond the n

43、umber of appropriate channels, or the maximum number of such additional calls has been reached; or if the maximum number of total calls supported at the given subscribers interface(s) has been reached. 2.1.3.6 notification subscription option: Information sent in the backward direction indicating th

44、at the diversion with or without redirection number can be presented to the calling user. 2.1.3.7 redirecting indicator: Information sent in either direction indicating whether the call has been diverted or rerouted and whether or not presentation of redirection information to the calling party is r

45、estricted. 2.1.3.8 redirecting number: Information sent in the forward direction when a call is diverted, indicating the number fi-om which the call was last diverted. 2.1.3.9 redirecting reason: Information sent in either direction indicating, in the case of calls undergoing redirection, the reason

46、 why the call has been redirected. 2.1.3.10 redirection counter: Information sent in either direction indicating the number of redirections which have occurred on a call. 2.1.3.11 redirection number: Information sent in the backward direction indicating the number towards which the call must be redi

47、rected or has been forwarded. 2.1.3.12 redirection number restriction indicator: Information sent in the backward direction indicating whether the diverted-to user allows the presentation of his number. 2.1.3.13 served user: The user of a particular ISDN number requesting calls to that number to be

48、diverted. This user may also be referred to as the forwarding, deflecting or diverting user, or the called user. This user shall have subscribed to the specific call diversion supplementary service requested. 2.1.3.14 user determined user busy (UDUB): Is specified for the case that the network offer

49、s the call to the subscriber and if no compatible terminal responds “positively“ but one or more compatible terminal responds “user busy“. This condition will be determined when the response-to- call offering time-out occurs. - 2.1.4 Abbreviations This Recommendation uses the following abbreviations: ACM Address Complete Message CD Call Deflection CFB Call Forwarding Busy CFNR Call Forwarding No Reply CFU Call Forwarding Unconditional CLIP Calling Line Identification Presentation CLIR Calling Line Identification Restriction COLP Connected