1、 International Telecommunication Union ITU-T E.164TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 2(03/2012) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS International operation Numbering plan of the international telephone service The intern
2、ational public telecommunication numbering plan Supplement 2: Number portability Recommendation ITU-T E.164 Supplement 2 ITU-T E-SERIES RECOMMENDATIONS OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS INTERNATIONAL OPERATION Definitions E.100E.103 General provisions
3、concerning Administrations E.104E.119 General provisions concerning users E.120E.139 Operation of international telephone services E.140E.159 Numbering plan of the international telephone service E.160E.169International routing plan E.170E.179 Tones in national signalling systems E.180E.189 Numberin
4、g plan of the international telephone service E.190E.199 Maritime mobile service and public land mobile service E.200E.229 OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELEPHONE SERVICE Charging in the international telephone service E.230E.249 Measuring and record
5、ing call durations for accounting purposes E.260E.269 UTILIZATION OF THE INTERNATIONAL TELEPHONE NETWORK FOR NON-TELEPHONY APPLICATIONS General E.300E.319 Phototelegraphy E.320E.329 ISDN PROVISIONS CONCERNING USERS E.330E.349 INTERNATIONAL ROUTING PLAN E.350E.399 NETWORK MANAGEMENT International ser
6、vice statistics E.400E.404 International network management E.405E.419 Checking the quality of the international telephone service E.420E.489 TRAFFIC ENGINEERING Measurement and recording of traffic E.490E.505 Forecasting of traffic E.506E.509 Determination of the number of circuits in manual operat
7、ion E.510E.519 Determination of the number of circuits in automatic and semi-automatic operation E.520E.539 Grade of service E.540E.599 Definitions E.600E.649 Traffic engineering for IP-networks E.650E.699 ISDN traffic engineering E.700E.749 Mobile network traffic engineering E.750E.799 QUALITY OF T
8、ELECOMMUNICATION SERVICES: CONCEPTS, MODELS, OBJECTIVES AND DEPENDABILITY PLANNING Terms and definitions related to the quality of telecommunication services E.800E.809 Models for telecommunication services E.810E.844 Objectives for quality of service and related concepts of telecommunication servic
9、es E.845E.859 Use of quality of service objectives for planning of telecommunication networks E.860E.879 Field data collection and evaluation on the performance of equipment, networks and services E.880E.899 OTHER E.900E.999 INTERNATIONAL OPERATION Numbering plan of the international telephone servi
10、ce E.1100E.1199 NETWORK MANAGEMENT International network management E.4100E.4199 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T E.164/Suppl.2 (03/2012) i Recommendation ITU-T E.164 The international public telecommunication numbering plan Supplement 2 Number porta
11、bility Summary Supplement 2 to Recommendation ITU-T E.164 defines standard terminology for a common understanding of the different aspects of number portability within an ITU-T E.164 numbering scheme. It identifies numbering and addressing formats, call flows, network architectures and routing appro
12、aches that will provide alternative methods of implementation. It also proposes some examples of the administrative and operational processes required for the successful implementation of number portability. History Edition Recommendation Approval Study Group 1.0 ITU-T E.164/I.331 1984-10-19 2.0 ITU
13、-T E.164/I.331/Q.11 bis 1988-11-25 3.0 ITU-T E.164/I.331 1991-08-23 II 4.0 ITU-T E.164 1997-05-30 2 4.1 ITU-T E.164 Suppl. 2 1998-11-13 2 4.2 ITU-T E.164 Suppl. 3 2002-05-16 2 4.3 ITU-T E.164 Suppl. 4 2003-05-02 2 4.4 ITU-T E.164 Suppl. 5 2008-05-15 2 5.0 ITU-T E.164 2005-02-24 2 6.0 ITU-T E.164 201
14、0-11-18 2 6.1 ITU-T E.164 Suppl. 1 1998-03-09 2 6.1 ITU-T E.164 (2010) Amd. 1 2011-06-10 2 6.2 ITU-T E.164 Suppl. 2 2012-03-29 2 6.3 ITU-T E.164 Suppl. 3 2004-05-28 2 6.3 ITU-T E.164 Suppl. 2 2009-11-24 2 6.4 ITU-T E.164 Suppl. 3 Amd. 1 2009-11-24 2 6.5 ITU-T E.164 Suppl. 4 2004-05-28 2 6.6 ITU-T E.
15、164 Suppl. 4 Amd. 1 2009-11-24 2 6.7 ITU-T E.164 Suppl. 5 2009-11-24 2 6.9 ITU-T E.164 Suppl. 6 2012-03-29 2 ii Rec. ITU-T E.164/Suppl.2 (03/2012) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and com
16、munication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. 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.
17、The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolutio
18、n 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this publication, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a r
19、ecognized operating agency. Compliance with this publication is voluntary. However, the publication may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the publication is achieved when all of these mandatory provisions are met. The words
20、“shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the publication is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the p
21、ractice or implementation of this publication may involve the use of a claimed Intellectual Property Right. 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 publication developme
22、nt process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, implementers are cautioned that this may not represent the latest information and are therefore strong
23、ly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2012 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T E.164/Suppl.2 (03/2012) iii Table of Contents Page 1 Scope 1 2 Re
24、ferences. 1 3 Definitions and abbreviations . 2 3.1 Definitions 2 3.2 Abbreviations . 3 4 ITU-T E.164 number structures 4 4.1 International public telecommunication number for geographic areas 5 4.2 International public telecommunication number for global services . 5 4.3 International public teleco
25、mmunication number for networks 6 5 Number portability types for national ITU-T E.164 numbers 6 6 Generic implementation of number portability 7 7 Entities addressed by routing 8 8 Number portability mechanisms . 8 8.1 Assumptions . 8 8.2 General description . 8 9 Types of addresses and numbers with
26、in networks and across network boundaries 12 9.1 Concatenated address . 12 9.2 Separated addresses 13 9.3 RN only 14 9.4 DN only (normally across network boundaries) 14 10 Combinations of addressing types, addressed entities and mechanisms: general signalling requirements . 15 11 Examples of locatio
27、ns of OpDBs and CRDBs for number portability . 16 11.1 General description . 16 11.2 Examples of a number portability database solution 16 12 Administrative processes 19 Rec. ITU-T E.164/Suppl.2 (03/2012) 1 Recommendation ITU-T E.164 The international public telecommunication numbering plan Suppleme
28、nt 2 Number portability 1 Scope This supplement defines standard terminology for a common understanding of the different aspects of number portability within an ITU-T E.164 numbering plan. It identifies numbering and addressing formats, call flows, network architectures, database structures, and rou
29、ting approaches that will provide alternative methods of implementation. It also proposes some examples of the administrative and operational processes required for the successful implementation of number portability. 2 References ITU-T E.101 Recommendation ITU-T E.101 (2009), Definitions of terms u
30、sed for identifiers (names, numbers, addresses and other identifiers) for public telecommunication services and networks in the E-series Recommendations. ITU-T E.129 Recommendation ITU-T E.129 (2009), Presentation of national numbering plans. ITU-T E.164 Recommendation ITU-T E.164 (2010), The intern
31、ational public telecommunication numbering plan. ITU-T Q-Sup.3 ITU-T Q-series Recommendations Supplement 3 (1998), Number portability Scope and capability set 1 architecture. ITU-T Q-Sup.4 ITU-T Q-series Recommendations Supplement 4 (1998), Number portability Capability set 1 requirements for servic
32、e provider portability (All call query and Onward routing). ITU-T Q-Sup.5 ITU-T Q-series Recommendations Supplement 5 (1999), Number portability Capability set 2 requirements for service provider portability (Query on release and Dropback). ETSI TR 101 698 ETSI TR 101 698 V1.1.1 (1999), Number Porta
33、bility Task Force (NPTF); Administrative support of service provider portability for geographic and non-geographic numbers. ETSI TR 184 003 ETSI TR 184 003 V3.1.1 (2010), Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Portability of telephone numbe
34、rs between operators for Next Generation Networks (NGNs). ETSI TS 184 011 ETSI TS 184 011 V3.1.1 (2011), Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Requirements and usage of E.164 numbers in Next Generation Network (NGN) and Next Generation Cor
35、porate Network (NGCN). IETF RFC 3761 IETF RFC 3761 (2004), The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation Discovery System (DDDS) Application (ENUM). 2 Rec. ITU-T E.164/Suppl.2 (03/2012) 3 Definitions and abbreviations 3.1 Definitions The following definitions and terms used in t
36、his supplement are to be used within the context of number portability. 3.1.1 address (taken from ITU-T E.101): An address identifies a specific network termination point and can be used for routing to this physical and logical termination point inside a public or private network. 3.1.2 central refe
37、rence database (CRDB): A non-real time database that is used to store a countrys number portability routing data. The data contained in the CRDB usually consist of a list of ported telephone numbers with associated domain names routing numbers and optionally further information of administrative nat
38、ure required to support the processing of a ported telephone number from one service provider to another service provider. These data can directly provide routing information (i.e., routing number) or are stored in a format which request further processing in order to render routing information. It
39、is a national matter if a unique administrative CRDB exists and/or whether there is one physical CRDB system or a logical one, which may be distributed or replicated among the service providers involved. 3.1.3 directory number: See end users number. 3.1.4 donor network: The initial network where a n
40、umber was located before ever being ported. 3.1.5 donor service provider: The service provider from whom the number was initially ported. 3.1.6 end users number: The E.164 number, also denominated telephone number from ITU-T E.101 for telephony call, used by the calling party to establish a call/ses
41、sion to the end user. This number is also used for presentation services like calling line identification (CLI) and connected line identification presentation (COLP). The end users number is equivalent to a directory number. 3.1.7 ENUM query: Query made using ENUM in order to resolve a specific E.16
42、4 number to a routable URI. 3.1.8 geographic number (GN) (taken from ITU-T E.101): An E.164 number which corresponds to a discrete geographic area. 3.1.9 location portability: The ability of an end user to retain nationally the same national E.164 public telecommunication number when moving from one
43、 location to another. 3.1.10 network operator: An entity that operates a network infrastructure for call establishment and routing. 3.1.11 non-geographic number (taken from ITU-T E.101): An E.164 number which has no geographic significance. 3.1.12 E.164 numbering plan (taken from ITU-T E.101): The p
44、ublic numbering plan, that is defined in the ITU-T E.164 Recommendation, that specifies the format and structure of the numbers used within that plan. It consists of decimal digits segmented into groups in order to identify specific elements used for identification, routing and charging capabilities
45、, e.g., to identify countries, national destinations and subscribers. An E.164 numbering plan does not include prefixes, suffixes and additional information required to complete a call. The national numbering plan (NNP) is the national implementation of the E.164 international numbering plan (also c
46、alled the international public telecommunication numbering plan). Rec. ITU-T E.164/Suppl.2 (03/2012) 3 3.1.13 operational database (OpDB, also abbreviated in the following as “DB“): An OpDB, as defined in ETSI TR 184 003, is a real time database, typically operated by each operator, that stores numb
47、er portability (NP) data that are updated from a number portability database (NPDB, that is a non-real time database, that is the same as a Central Reference Database, CRDB), including in principle the number portability routing information (NRI) to be used for routing. 3.1.14 originating network: T
48、he network serving a calling end user. 3.1.15 portable number: A complete E.164 number identified by an appropriate authority which is subject to number portability. 3.1.16 ported number: An end users E.164 number that has been subject to number portability. 3.1.17 recipient network: The network whe
49、re a number is located after being ported. 3.1.18 recipient service provider: The service provider to whom the number is ported and which typically operates the recipient network. 3.1.19 routing number (taken from ITU-T E.101): An address/number, only used for routing purposes and not known and usable by end users, that is derived and used by the public telecommunication network to route the call/session towards the recipient network also in the NP context. 3.1.20 triggering netwo
