ITU-T Q 731 1-1996 Stage 3 Description for Numbering Identification Supplementary Services Using SS No 7 Direct-Dialling-in (DDI) - Series Q Switching and Signalling Specificationsr.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF iTU Qm731 ml SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 - ISDN supplementary services (0?/96) Stage 3 description for numbering identification supplementary services using SS No.

2、 7: Direct-Dialling-In (DDI) ITU-T Recommendation Q.731 .I (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 INFORMATION FLOWS FOR SERVICES IN THE I

3、SDN SPECIFICATION OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS 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 S

4、TANDARD SYSTEMS General Message transfer part Simplified message transfer part Signalling connection control pari Telephone user part Q.l-Q.3 Q.4-Q.59 (2.604.99 Q.lOo-Q.119 (2.1 204.249 Q.250-Q.309 Q.310-Q.399 (2.40 W.499 Q.50 04.599 Q .60o-Q.699 Q.700-Q.849 Q.700 Q.70l-Q.709 Q.71 O Q.711-Q.719 Q.72

5、0-Q.729 .% . .73 9 II SDN supplementary servick- I. Data user part Signalling System No. 7 management ISDN user part Transaction capabilities application part Test specification Q3 interface U DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SY

6、STEMS INTELLIGENT NETWORK BROADBAND ISDN (2.7404.749 Q.750-Q.759 Q.760-Q.769 Q.770-Q.779 Q .7 80-Q .799 Q.800-Q.849 Q.850-Q.999 Q. 1 OOO-Q. 1 O99 (2.1 10042.1 199 Q.120O-Q.1999 Q.2000-Q.2999 For further details, please refer to ITU-T List of Recommendations. STD-ITU-T RECMN Q*73L-L-ENGL L99b 48b257L

7、 0b208b7 22T ITU-T RECOMMENDATION Q.731.1 STAGE 3 DESCRIPTION FOR NUMBERING IDENTIFICATION SUPPLEMENTARY SERVICES USING SS NO. 7: DIRECT-DIALLING-IN (DDI) Summary This Recommendation defines the essential functions, procedures and messages required for the transportation of direct-dialling-in inform

8、ation. This Recommendation has been updated due to errors in the Recommendation of 1992. Source U-T Recommendation 4.731.1 was revised by ITU-T Study Group 11 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 9th of July 1996. - STD-ITU-T RECMN Q*73L*L-ENGL L77b Iidb257L

9、Ob208bd Lbb 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 organ of the U. The U-T is responsible for studying technical, operating and tariff qu

10、estions 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 U-T Study Groups which, in their turn, produce Recomm

11、endations 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 (Helsinki, March 1-12, 1993). In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a coll

12、aborative 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. O ITU 1996 All rights reserved. No part of this publication may be reproduced or utilized in a

13、ny form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation 4.731.1 (07/96) - STD-ITU-T RECMN Q.73L-L-ENGL L79b qb2571 Ob208b7 UT2 m 1 1.1 1.2 1.3 1.4 1.5 1.6 CONTENTS Page Direct.Dial1ing.h . Introduction 1.1

14、.1 Scope 1.1.2 References . 1.1.3 Terms and definitions . 1.1.4 Abbreviations Description . 1.2.1 General description . 1.2.2 Specific terminology . 1.2.3 Qualification on the applicability to telecommunication services 1.2.4 State definition Operational requirements . 1.3.1 Provisiodwithdrawal 1.3.

15、2 Requirements on the originating network side . 1.3.3 Requirements in the network Coding requirements Signalling requirements . 1.5.1 Activatioddeactivatiodregistration . 1.5.2 Invocation and operation Interaction with other supplementary services . 1.6.1 1.6.2 1.6.3 1.6.4 1.6.5 1.6.6 1.6.7 1.6.8 1

16、.6.9 1.6.10 1.6.1 1 1.6.12 1.6.13 1.6.14 1.6.15 1.6.16 1.6.17 1.6.18 Call Waiting (CW) Call Transfer (CT) Connected Line Identification Presentation (COLP) Connected Line Identification Restriction (COLR) Calling Line Identification Presentation (CLIP) . Calling Line Identification Restriction (CLIR

17、) . Closed User Group (CUG) . Conference Calling (CONF) . Direct-Dialling-In (DDI) . Call Diversion Services (CDIV) . Line Hunting (LH) Three-Party Service (3PTY) . User-to-User Signalling (UUS) Multiple Subscriber Number (MSN) Call Hold (HOLD) Advice of Charge (AOC) Sub-addressing (SUB) Terminal Po

18、rtability (TP) . Recommendation 4.731.1 (07196) 2 3 3 3 4 4 4 4 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 . 111 1.6.19 1.6.20 1.6.21 Reverse Charging (REV) 1.6.22 1.6.23 1.6.24 Charge Card 1.7 Interaction with other networks . 1.8 Signalling flows . 1.9 Parameter value (timers) 1.10 Dynamic description Completi

19、on of Calls to Busy Subscriber (CCBS) . Malicious Call Identification (MCID) Multi-Level Precedence and Preemption (MLPP) Private Numbering Plan (PNP) . Page 6 6 6 6 6 6 6 7 7 7 iv Recommendation Q.731.1 (07/96) . STD-ITU-T RECMN Q.731.1-ENGL L77b 48b257L Ob20873 750 Recommendation Q.73 1.1 STAGE 3

20、DESCRIPTION FOR NUMBER IDENTIFICATION SUPPLEMENTARY SERVICES USING SS NO. 7: DIRECT-DIALLING-IN (revised in 1996) 1 Direct-Dialling-In 1.1 Introduction 1.1.1 Scope This Recommendation describes the Stage 3 of the Direct-Dialling-In supplementary service for the Integrated Services Digital Network (I

21、SDN) by means of the Signalling System No. 7 ISDN User Part (ISUP). Direct-Dialling-In (DDI) enables a user to call directly another user on an ISPBX or other private system without attendant intervention, the DDI digit(s) being the least significant digit(s) of the called ISDN number. 1.1.2 Referen

22、ces The following Recommendations, and other references contain provisions which, through reference in text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revisions; all users of th

23、is 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. ITU-T Recommendation I. 1 12 (1993), Vocabulary oftermsf

24、or ISDNs. CCITT Recommendation I. 130 (1988), Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN. ITU-T Recommendation 1.2 10 (1993), Principles of telecommunication services supported by an ISDN and the means to describe them. CCIT

25、T Recommendation 1.250 ( 1988), Definition of supplementary services. CCITT Recommendation 1.25 1.1 (1992), Number Identification Supplementary Services: Direct-Dialling-In. CCITT Recommendation Q.8 1.1 (1988), Stage 2 description for number identification supplementary services: Direct-Dialling-In.

26、 ITU-T Recommendation Q.730 (1993), Signalling System No. 7 - ISDN supplementary services. ITU-T Recommendation 4.761 (1993), Functional description of the ISDN User Part of Signalling System No. 7. ITU-T Recommendation 4.762 (1993), General function of messages and signals of the ISDN User Part of

27、Signalling System No. 7. ITU-T Recommendation 4.763 (1993), Format and codes of the ISDN User Part of Signalling System No. 7. Recommendation Q.731.1 (07/96) 1 li 121 ITU-T Recommendation 4.764 (1993), Signalling System No. 7 - ISDN User Part Signalling procedures. CCITT Recommendation Q.95 1.1 (199

28、2), Stage 3 description for number identiJcation supplementary services using DSS I: Direct-Dialling-In (DDD. 1.1.3 Terms and definitions No special terms or definitions are used. 1.1.4 Abbreviations For the purposes of this Recommendation, the following abbreviations are used. DDI Direct-Dialling-I

29、n DSS 1 Digital Subscriber Signalling System No. 1 ISDN Integrated Services Digital Network ISPBX Integrated Services Private Branch Exchange ISUP ISDN User Part PABX Private Automatic Branch Exchange 1.2 Description 1.2.1 General description The Stage 1 description of DDI is to be found in Recommen

30、dation 1.251.1. The Stage 2 descriptions is included in Recommendation Q.8 1.1. The Stage 3 description of DDI complements the ISDN User Part (ISUP) protocol as defined in Recommendations 4.761 to 4.764 and 4.766. 1.2.2 Specific terminology See 1.1.3, terms and definitions. 1.2.3 See 1.2.3A.251. Qua

31、lification on the applicability to telecommunication services 1.2.4 State definition No specific state definitions are required. 1.3 Operational requirements 1.3.1 Provision/withdrawal This service shall be offeredwithdrawn after pre-arrangement with the service provider. The service provider shall

32、allocate a set of ISDN numbers. 1.3.2 Not applicable. 1.3.3 Requirements in the network No specific requirements are needed in the network. Requirements on the originating network side 1.4 Coding requirements None identified. 2 Recommendation Q.731.1 (07/96) STD-ITU-T RECMN d.731-L-ENGL L77b 48b257L

33、 Ob20873 523 1.5 Signalling requirements 1.5.1 Activation/deactivation/registration Activation through subscription. 1.5.2 Invocation and operation Call initiation procedures are the same as for the basic service. 1.5.2.1 Actions at the originating local exchange 1.5.2.1.1 Normal operation The proce

34、dures to set up a call are in general the same as the basic procedures. 1.5.2.1.2 Exceptional procedures No exceptional procedures are identified. 1.5.2.2 1.5.2.2.1 Normal operation The procedures to set up a call are in general the same as the basic procedures. 1.5.2.2.2 Exceptional procedures No e

35、xceptional procedures are identified. 1.5.2.3 1.5.2.3.1 Normal operation The procedures to set up a call are in general the same as the basic procedures. 1.5.2.3.2 Exceptional procedures No exceptional procedures are identified. 1.5.2.4 1.5.2.4.1 Normal operation The procedures to set up a call are

36、in general the same as the basic procedures. 1.5.2.4.2 Exceptional procedures No exceptional procedures are identified. Actions at the transit exchange Actions at the outgoing international gateway exchange Actions at the incoming international gateway exchange 1.5.2.5 1.5.2.5.1 Normal operation A d

37、istinction is made whether DDI is applied to an analogue or an ISPBX and whether the destination local exchange is aware of the number of DDI digits required by the called PAl3X. Besides sending the address complete message and possibly call progress message(s), the subsequent messages will be the s

38、ame as for a normal call without DDI. Actions at the destination local exchange Recommendation 4.731.1 (07196) 3 STDmITU-T RECMN Q.73L-L-ENGL L77b = i8b259L Ob20874 4bT 1.5.2.5.1.1 Analogue PABX An address complete message is sent as soon as the destination local exchange has received the complete c

39、alled party number and has selected a free circuit to the PAJ3X. The called line status is set to “no indication“. If the destination local exchange has no knowledge about the number of DDI digits required to set up the call, it selects a free circuit, sends the received DDI digits to the PAl3X and

40、return an address complete message as soon as it has received a signal to that effect from the PABX. The called line status is set to either “no indication“ or “subscriber free“ according to the signal received from the PABX. 1.5.2.5.1.2 Integrated Services Private Branch Exchange (ISPBX) An address

41、 complete message is sent as soon as the destination local exchange has received the complete called party number with the called line status set to “no indication“. If the destination local exchange has no knowledge about the number of DDI digits required to set up the call, it sends an address com

42、plete message as soon as it has received the relevant information (call proceeding) from the PABX. The called line status is set to “no indication“. On receipt of an “alerting“ indication from the PABX, the destination local exchange sends a call progress message with the called line status set to “

43、subscriber free“. If tones and/or announcements are provided from the destination local exchange, the transmission path is through connected on receipt of the relevant information (connect) from the PABX before sending the answer message to the preceding exchange. If tones and/or announcements are p

44、rovided from the PABX, the destination local exchange connects the backward path on receipt of an indication to that effect from the PABX and sends a call progress message to the preceding exchange. The transmission path is fully through connected on receipt of the relevant information (connect) fro

45、m the PABX. 1.5.2.5.2 Exceptional procedures No exceptional procedures are identified. 1.6 The following cases are considered: - - - - Interaction with other supplementary services A is a normal call originating user; B is a normal call terminating user; X is a call originating user who can be calle

46、d by means of DDI digits; Y is a call terminating user who is called by means of DDI digits. 1.6.1 Call Waiting (CW) No impact on ISUP. 1.6.2 Call Transfer (CT) No applicable interaction at this time. 1.6.3 A calls Y: The transmission of the extension number of Y depends on whether Y has delivered a

47、 valid extension number, i.e. one within the range of numbers allocated to his PABX. If a valid extension number is provided by the calling user, it is transmitted; if not valid, only the network provided default number of the PABX access is transmitted. Connected Line Identification Presentation (C

48、OLP) 4 Recommendation Q.731.1 (07196) Xcalls B: No impact, i.e. neither supplementary service shall affect the operation of the other supplementary service. 1.6.4 Acalls Y: As in COLP with the addition that the restriction extends to the connected partys extension number too. Xcalls B: No impact, i.

49、e. neither supplementary service shall affect the operation of the other supplementary service. Connected Line Identification Restriction (COLR) 1.6.5 Calling Line Identification Presentation (CLIP) A calls Y: X calls B: No impact, Le. neither supplementary service shall affect the operation of the other supplementary service. The transmission of the extension number of X depends on whether X has delivered a valid extension number, i.e. one within the range of numbers allocated to his PABX. If a valid extension number is provided by the called user it is transmitted;