1、 International Telecommunication Union ITU-T E.157TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2009) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS International operation Operation of international telephone services International calling party nu
2、mber delivery Recommendation ITU-T E.157 ITU-T E-SERIES RECOMMENDATIONS OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS INTERNATIONAL OPERATION Definitions E.100E.103 General provisions concerning Administrations E.104E.119 General provisions concerning users E.120E
3、.139 Operation of international telephone services E.140E.159Numbering plan of the international telephone service E.160E.169 International routing plan E.170E.179 Tones in national signalling systems E.180E.189 Numbering plan of the international telephone service E.190E.199 Maritime mobile service
4、 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 recording call durations for accounting purposes E.260E.269 UTILIZATION OF THE INTERNA
5、TIONAL 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 service statistics E.400E.404 International network management E.405E.419 Checking
6、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 operation E.510E.519 Determination of the number of circuits in automatic and semi-aut
7、omatic 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 TELECOMMUNICATION SERVICES: CONCEPTS, MODELS, OBJECTIVES AND DEPENDABILITY PLANNI
8、NG 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 services E.845E.859 Use of quality of service objectives for planning of telecommunica
9、tion 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 service E.1100E.1199 For further details, please refer to the list of ITU-T Recommend
10、ations. Rec. ITU-T E.157 (11/2009) i Recommendation ITU-T E.157 International calling party number delivery Summary Recommendation ITU-T E.157 provides guidance for international calling party number delivery which is technology neutral. It also clarifies the relationship between calling party numbe
11、r delivery and number identification supplementary service. International calling party number delivery refers to calling party number delivery across boundaries of countries. Source Recommendation ITU-T E.157 was approved on 24 November 2009 by ITU-T Study Group 2 (2009-2012) under the WTSA Resolut
12、ion 1 procedure. ii Rec. ITU-T E.157 (11/2009) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a perman
13、ent 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. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establish
14、es 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 Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standar
15、ds are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recomm
16、endation may contain certain mandatory provisions (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are
17、 used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Inte
18、llectual 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 Recommendation development process. As of the date of approval of this Recommendation, ITU had not recei
19、ved notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr
20、/. ITU 2010 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.157 (11/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recomme
21、ndation . 2 4 Abbreviations and acronyms 2 5 International calling party number delivery . 2 6 Calling party number delivery and number identification supplementary service . 3 7 Delivery guidance . 3 7.1 General principles . 3 7.2 Delivery guidance . 3 Bibliography. 6 iv Rec. ITU-T E.157 (11/2009)
22、Introduction Operators have developed, or are developing implementation of calling party number delivery between each other. Implementation of calling party number delivery utilizes the features, facilities and applications available in the national public networks and service offerings. It could be
23、 guaranteed through the agreements with originating operators and might also be under some form of regulation by national Administrations. In this sense, it is a national matter. However, the delivery of calling party numbers can transcend national boundaries, in which case, it is not only a nationa
24、l matter, but involves more than one country. There appears to be a trend to suppress transmission across international boundaries of calling party numbers. Such practices have an unfavourable effect on security and economic issues. This Recommendation provides guidance for the delivery of calling p
25、arty numbers across different countries to improve security and minimize fraud and technical harm as called for by Article 42 of the Constitution. Rec. ITU-T E.157 (11/2009) 1 Recommendation ITU-T E.157 International calling party number delivery 1 Scope This Recommendation provides guidance for int
26、ernational calling party number delivery, which is technology neutral. The mechanism to assess the veracity of a particular calling party number (i.e., the international E.164 number) is out of the scope of this Recommendation. Any agreement in countries is a national matter and is not considered in
27、 this Recommendation. 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 editions indicated were valid. All Recommendations and other references
28、are subject to revision; 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 currently valid ITU-T Recommendations is regularly published. The reference to a d
29、ocument within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T E.101 Recommendation ITU-T E.101 (2009), Definitions of terms used for identifiers (names, numbers, addresses and other identifiers) for public telecommunication services and network
30、s in the E-series Recommendations. ITU-T E.164 Recommendation ITU-T E.164 (2005), The international public telecommunication numbering plan. ITU-T I.251.3 Recommendation ITU-T I.251.3 (1992), Calling Line Identification Presentation. ITU-T I.251.4 Recommendation ITU-T I.251.4 (1992), Calling Line Id
31、entification Restriction. ITU-T I.251.7 Recommendation ITU-T I.251.7 (1992), Malicious Call Identification. ITU-T Q.731 Recommendation ITU-T Q.731 (1993), Stage 3 description for number identification supplementary services using Signalling System No. 7. ITU-T Q.731.7 Recommendation ITU-T Q.731.7 (1
32、997), Stage 3 description for number identification supplementary services using Signalling System No. 7: Malicious call identification (MCID). ITU-T Q.764 Recommendation ITU-T Q.764 (1999), Signalling System No. 7 ISDN user part signalling procedures. ITU-T Q.1912.5 Recommendation ITU-T Q.1912.5 (2
33、004), Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN User Part. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 country b-ITU-T E.164-Sup.3: A specific country, a group of cou
34、ntries in an integrated numbering plan or a specific geographical area. 2 Rec. ITU-T E.157 (11/2009) 3.1.2 operator b-ITU-T E.212: An operating agency providing public telecommunications networks or public telecommunication services. 3.1.3 telephone number ITU-T E.101: The number, derived from the E
35、.164 numbering plan, used by the calling party to establish a call to an end user or a service. The number may also be used for presentation services like Calling Line Identification Presentation (CLIP) and Connected Line Identification Presentation (COLP) and may also be published in different dire
36、ctories and/or directory enquiry services. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 calling party number: The telephone number of the originator of the call. 3.2.2 international calling party number delivery: Calling party number delivery across
37、 boundaries of countries. 3.2.3 pilot number: The telephone number used for selecting a trunk from a group of trunks. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: CC Country Code CLI Calling Line Identification CLIP Calling Line Identification Prese
38、ntation CLIR Calling Line Identification Restriction GoC Groups of Countries MCID Malicious Call Identification 5 International calling party number delivery International calling party number delivery refers to calling party number delivery across boundaries of countries. The delivery of calling pa
39、rty numbers usually involves an originating network, a terminating network and a transit network, if necessary. A calling party number may be provided by the originating network, transmitted by the transit network(s) and received by the terminating network. For international calling party number del
40、ivery (see Figure 1), only the calling party numbers delivered across boundaries of countries are considered. For the purpose of this Recommendation, the originating, transit and terminating networks are presented as one entity. In some national environments this may not be the case. E.157(09)_F01Tr
41、ansit networkOriginating network Terminating networkCountry A Country BCountry CCalling party numberCalling party numberTerminating networkCountry DCalling party numberFigure 1 International calling party number delivery Rec. ITU-T E.157 (11/2009) 3 6 Calling party number delivery and number identif
42、ication supplementary service Calling party number delivery is the basis for identifying the originating parties of calls and providing number identification supplementary services such as CLIP, MCID, which are specified in ITU-T I.251 (for service) and ITU-T Q.731 (for signalling) series. If the ca
43、lling user has activated the calling line identification restriction (CLIR) supplementary service, with the calling line identity being marked as presentation restricted, the originating network may or may not restrict the information conveyed in the generic number and/or calling party number parame
44、ter(s) from being sent to the destination network, depending on either bilateral agreement, or be consistent with technical capabilities and national legal and regulatory frameworks. Calling party number delivery is provided independently of the subscribers. 7 Delivery guidance The following ITU-T R
45、ecommendations contain provisions that constitute provisions of Recommendation ITU-T E.157: ITU-T E.101, ITU-T E.164, ITU-T I.251.3, ITU-T I.251.4, ITU-T I.251.7, ITU-T Q.731, ITU-T Q.731.7, ITU-T Q.764, and ITU-T Q.1912.5. Calling party numbers shall, consistent with technical capabilities and nati
46、onal legal and regulatory frameworks, be delivered across boundaries of countries except for the following cases: a) Depending on bilateral/multi-lateral agreement, the originating network may restrict the calling party number from being sent to the destination network when the CLIR supplementary se
47、rvice is applicable. b) Restrictions in cases of national legal and regulatory frameworks. In both cases a) and b), calling party numbers sent across international boundaries shall, consistent with technical capabilities and national legal and regulatory frameworks, contain as a minimum the country
48、code of the originating country. 7.1 General principles 7.1.1 International calling party number delivery shall, consistent with technical capabilities and national legal and regulatory frameworks, be provided based on the relevant ITU-T Recommendations. 7.1.2 For international E.164 numbers for geo
49、graphic areas, the delivered calling party numbers shall, consistent with technical capabilities and national legal and regulatory frameworks, be prefixed with country codes to identify in which country the calls are originated before they are delivered from an originating country to a receiving (succeeding) country. In addition to the country code, the delivered calling party number shall include the national destination code, or sufficient information to allow proper billing and accounting, for each
