1、INTERNATIONAL TELECOMMUNICATION UN I ON I ITU=T TEL E COM MU N I CAT I O N STANDARDIZATION SECTOR OF ITU Q.769.1 (1 2/99) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 - ISDN user part Signalling system No. 7 - ISDN user part enhancements for the support of number port
2、a bi I i ty ITU-T Recommendation Q.769. I (Previously CCITT Recommendation) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesSTDaITU-T RECMN Q-7bS-L-ENGL 1999 48b259L Ob70bSb 8bT ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SI
3、GNALLING IN THE INTERNATIONAL MANUAL SERVICE NTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING WNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q. 1 -Q. 3 Q.4-Q.59 Q.60-(2.99 :LAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100-Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 Q.120-Q.
4、249 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 IIGITAL EXCHANGES NTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 General Message transfer part (MTP) Signalling connection control part (SCCP) Tele
5、phone user part (TUP) ISDN supplementary services 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 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEM
6、S INTELLIGENT NETWORK 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.700 Q.701-Q.709 Q.711-Q.719 Q.720-Q.729 Q.730-Q.739 Q.740-Q.749 Q.750-Q.759 Q.76-Q.769 Q.770-Q.779 Q.780-Q.799 Q.800-Q.849 Q.850-Q.999 Q.1000-Q.l O99 Q. 1 1 00-Q.1199 Q. 1200-Q.1699 SIGNALLING REQUIRE
7、MENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN Q.1700-Q.1799 Q.2000-Q.2999 For further details, please refer to ITU-T List of Recommendations. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services - STDmITU-T RECMN Q*769*1-ENGL 1999 = 48b25
8、91 Ob70697 7Tb ITU-T RECOMMENDATION 4.769.1 SIGNALLING SYSTEM NO. 7 - ISDN USER PART ENHANCEMENTS FOR THE SUPPORT OF NUMBER PORTABILITY Summary This Recommendation specifies the relevant ISDN user part enhancements for the support of number portability in a national environment. Source ITU-T Recomme
9、ndation 4.769.1 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on 3 December 1999. Recommendation Q.769.1 (12/99) i COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services- STDmITU-T
10、 RECMN Q.769.L-ENGL 5999 4862591 Ob70698 b32 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Tclccoiiiiiiiiiiicritioii Staiitlait1iz:itioii Sector (ITU-T) is ;I pcriiiaiiciit org:iii of the ITU. The ITU-T is re
11、sponsible 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 topics for study by
12、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 purview, the necessary st
13、andards 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 attention to the poss
14、ibility 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 ITU members or others outside of
15、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 this may not represent the lates
16、t 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, without permission in writing from
17、 the ITU. 11 Recommendation Q.769.1 (12/99) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services1 2 3 4 5 6 6.1 6.2 6.3 6.4 6.5 6.6 CONTENTS Scope . References . Definitions Abbreviations Conventions Call control and signalling procedures .
18、 Separate Directory Number Addressing method 6.1.1 Handling of network routing number and directory number . 6.1.2 Handling of an incomplete directory number Other addressing methods . 6.3.1 Onward Routing 6.3.2 All Call Query 6.4.1 Onward Routing 6.4.2 All Call Query 6.5.1 Onward Routing 6.5.2 All
19、Call Query Actions required in the originating network . Actions required in the donor network . Actions required in a transit network Actions required in the recipient network . Annex A . Procedures for the Concatenated Addressing method . A . 1 General A.2 Exceptions to clause 6 of this Recommenda
20、tion Annex B - Procedures for the Separate Network Routing Number Addressing method B . 1 General B.2 Annex C - Procedures to support Query on Release . C.l General C.2 Procedures for QoR with the forward and the backward indications . C.2.1 Normal procedures . C.2.2 Exceptional procedures Exception
21、s to clause 6 of this Recommendation 579 rn Page 1 2 2 3 3 3 4 4 4 4 4 4 5 5 5 5 5 5 5 5 6 6 6 7 7 7 8 8 8 8 9 . Recommendation 4.769.1 (12/99) 111 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesPage 10 C.3 Procedures for QoR with the
22、backward indication only . C.3.1 Normal procedures . 10 C.3.2 Exceptional proccdures 11 Annex D - Procedures to support Dropback 11 D.l General 11 D.2 Actions required in the networks involved in the first leg 11 D.2.1 Actions required in the originating network 11 D.2.2 Actions required in the tran
23、sit network . 11 D.2.3 Actions required in the donor network 11 Actions required in the networks involved in the second leg . D.3.1 Actions required in the transit network . 12 D.3.2 Actions required in the rerouting network . 12 Actions required in the networks involved in the third leg . D.4.1 Act
24、ions required in a transit network . 12 D.4.2 Actions required in the recipient network . 12 D.3 12 D.4 12 Annex E - Procedures for forward transfer of number portability status information 13 E.l General 13 E.2 Normal procedures 13 E.2.1 Actions required at an initiating exchange 13 E.3 Exceptional
25、 procedures . 13 iv Recommendation 4.769.1 (12/99) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesRecommendation Q.769.1 SIGNALLING SYSTEM NO. 7 - TSDN USER PtIRT ENTTtINCEMENTS FOR THE SUPPORT OF NUMBER PORTABILITY (Geneva, 1999) 1 Sc
26、ope In a national environment with support of number portability, the existing ISUP procedures as specified in Recommendation Q.764 i apply with the modifications as specified in this Recommendation. NOTE - ISUP foriiiats aiid codes are described in Recoinmendation 4.763 2 The addressing method for
27、number portability in a network will have an impact on existing functions and services. The impact is network and implementation dependent and outside the scope of this Recommendation. With the introduction of the procedures for number portability as defined in this Recommendation, backwards compati
28、bility with the ISUP according to Recommendation Q.767 is not possible. In addition to the main text, the following annexes are part of this Recommendation: e Annex A describes an alternative addressing method making use of a concatenated addressing format. This addressing method may typically be us
29、eful as an intermediate solution in some networks as it may limit the impact on existing functions and services. Number Addressing method. It may be used within the network of a service provider. This addressing method may typically be useful in some networks as it may limit the impact on existing n
30、etwork functions and service handling. Annex B describes another addressing method making use of the Separate Network Routing Annex C describes the additional network capabilities for Query on Release that may be used within the network of a service provider. These additional capabilities may typica
31、lly be useful in some networks for network efficiency reasons. Annex D describes the additional network capabilities for Dropback that may be used within the network of a service provider. These capabilities make use of the procedures for Pivot Routing or Redirection as specified in Recommendation Q
32、.730 3. These additional capabilities may typically be useful in some networks for network efficiency reasons. Annex E describes the procedures for forward transfer of number portability status information that may be used within the network of a service provider. This service logic may be used in s
33、ome networks in order to minimize the number of number portability data base queries and reduce the risk of looping due to number portability data base mismatches. The use of these annexes is up to network operator decisions, bilateral agreement, regulatory demands andor implementation reasons. Thes
34、e considerations and possible pre-conditions are outside the scope of this Recommendation. Number portability introduces new requirements to retain full service transparency of ISDN supplementary services like Completion of Calls to Busy Subscriber (CCBS), which use non-circuit related signalling. T
35、he identified relay functions to meet these requirements are elaborated in Recommendation 4.730 3, subclause “Relay methods for non-circuit related signalling“. Recommendation 4.769.1 (12/99) 1 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Se
36、rvices2 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 editions indicated were valid. All Recorninendations md otlicr rcfercnces 31-c suljccl t
37、o rci,isoii; a11 users of this Recommendation are therefore encouraged to iiivestignte the possibility of appljiiig 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 IT-T Recommendation Q.7
38、64 (1999), Signalling System No. 7 - ISDN User Part signalling procedures. 2 ITU-T Recommendation 4.763 (1999), Signalling System No. 7 - ISDN User Part formats and codes. 3 ITU-T Recommendation 4.730 (1 999), ISDN User Part suyylenzentuiy swvices. 3 Definitions This Recommendation defines the follo
39、wing terms: 3.1 Directory number: A number in the national numbering scheme that is allocated to a customer for a telephony service. Allocation of the directory number is made directly by the numbering plan authority to the customer, or indirectly when blocks of numbers are managed by service provid
40、ers. 3.2 Donor exchange: The initial exchange where a number was located before ever being ported. 3.3 Donor network: The initial network where a number was located before ever being ported. 3.4 Initiating exchange: An exchange that requires and obtains the routing information for number portability
41、. 3.5 Initiating network: A network that requires and obtains the routing information for number portability. 3.6 Network routing number: A number that is derived and used by the network to route the call towards a ported number. 3.7 Originating exchange: The exchange serving a calling end user. For
42、 most incoming international calls, the originating exchange is effectively the international gateway. For carrier selection, the first exchange of the selected carrier effectively becomes the entry to the originating network for routing purposes. 3.8 Originating network: The network serving a calli
43、ng end user. For most incoming international calls, the originating network is effectively the network containing the international gateway, For carrier selection, the first exchange of the selected carrier effectively becomes the entry to the originating network for routing purposes. 3.9 3.10 3.11
44、exchange and the recipient exchange. 3.12 the recipient network. 3.13 Recipient exchange: The exchange where a number is located after being ported. Recipient network: The network where a number is located after being ported. Transit exchange: An exchange between two exchanges, e.g. between the init
45、iating Transit network: A network between two networks, e.g. between the initiating network and Rerouting: Pivot routing or redirection as specified in 3. 2 Recommendation 4.769.1 (12199) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services
46、4 Abbreviations This Recommendation uses the following abbreviations: ACM ANM CON CPG DN IAM ISUP NoA NRN QoR SAM SDM 5 1) 2) 6 Address Complete message Answer niess;igc Connect message Call Progress message Directory number Initial Address message ISDN User Part Nature of Address indicator Network
47、routing number Query on Release Subsequent Address message Subsequent Directory Number message Conventions The name of each element of the following classes of terms is capitalized: indicators; parameters; messages; methods/functions. Examples: Called Party Number parameter, Initial Address message,
48、 All Call Query, Query on Release, Separate Directory Number Addressing method, Separate Network Routing Number Addressing method. The definition of a parameter value is written in italics and is put between quotation marks. Example: NoA value O00001 1 - “national (significant) number“. Cali control
49、 and signalling procedures This clause describes the call control and signalling procedures for the methods All Call Query and Onward Routing (see 4 and 5, Bibliography). In a number portability environment, the directory number (DN) is not sufficient to route the call. There is a need to derive a network routing number (NRN) (see 4 and 5, Bibliography). Once the NRN has been determined, the routing in the network will be based on this NRN. As the NRN is always a complete address, sending of additional digits in overlap operation applies only to the directory nu
