1、 International Telecommunication Union ITU-T E.115TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/2010) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS International operation General provisions concerning Administrations Computerized directory assista
2、nce Recommendation ITU-T E.115 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.119General provisions concerning users E.120E.139 Operat
3、ion of international telephone services E.140E.159 Numbering 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 and publi
4、c 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 INTERNATIONAL TEL
5、EPHONE 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 the qualit
6、y 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-automatic ope
7、ration 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 PLANNING Terms a
8、nd 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 telecommunication netwo
9、rks 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 NETWORK MANAGEMENT International network management E.4100E.4199 For furth
10、er details, please refer to the list of ITU-T Recommendations. Rec. ITU-T E.115 (05/2010) i Recommendation ITU-T E.115 Computerized directory assistance Summary Recommendation ITU-T E.115 specifies the protocol, called the directory assistance protocol, to be used for directory assistance informatio
11、n exchange among service providers. This supports assistance/inquiry as part of the international telephone operator service allowing detailed information about subscribers business categories, localities, provinces and streets to be retrieved. This Recommendation also gives a description of the pri
12、nciples and procedures to be followed in interconnecting different national computerized directory assistance services. It specifies a protocol that allows exchange of information retrieved from databases with very advanced search capabilities. It specifies two versions of the protocol. Version 1 sp
13、ecifies basic functions, while version 2 of the protocol provides enhancements and uses HTTP as the underlying service and uses XML for protocol encoding. Version 2 of the protocol provides support for different language groups and provides possibility for location-based services. Version 2.10 of th
14、e protocol provides important additions to allow directory assistance service providers to exchange information about the databases supported, the functionalities that are available and requirements on input quality. History Edition Recommendation Approval Study Group 1.0 ITU-T E.115 1972-12-15 2.0
15、ITU-T E.115 1976-10-08 3.0 ITU-T E.115 1980-11-21 4.0 ITU-T E.115 1984-10-19 5.0 ITU-T E.115 1988-11-25 6.0 ITU-T E.115 1991-03-11 I 7.0 ITU-T E.115 1993-03-12 I 8.0 ITU-T E.115 1995-02-21 9.0 ITU-T E.115 2006-02-06 17 9.1 ITU-T E.115 (2006) Cor. 1 2006-06-13 17 10.0 ITU-T E.115 2007-05-29 17 11.0 I
16、TU-T E.115 2008-05-29 17 12.0 ITU-T E.115 2010-05-29 17 ii Rec. ITU-T E.115 (05/2010) 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 Sta
17、ndardization 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. The World Telecommunication Standardization Assembly (WTSA),
18、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 Resolution 1. In some areas of information technology which fall withi
19、n ITU-Ts purview, the necessary standards 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 Recommend
20、ation is voluntary. However, the Recommendation 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
21、 “must“ and the negative equivalents are 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 Recommendati
22、on 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 Recommendation development process. As of the date of approval o
23、f this Recommendation, ITU had not received 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
24、 database at http:/www.itu.int/ITU-T/ipr/. 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.115 (05/2010) iii CONTENTS Page 1 Scope 1 2 Normative references 1 3 Definitions 2 4 Abbreviation
25、s 3 5 Conventions 4 6 Basic concepts and models . 4 6.1 Functional model 4 6.2 Service models 7 7 Principles for the organization of an interconnected computerized international information service . 9 8 Service specification . 9 8.1 Inquiry information 10 8.2 Reply information . 10 8.3 Conversion 1
26、0 8.4 Version 2 extensibility 10 8.5 Functionality . 10 9 Common protocol specification elements 14 9.1 Character subsets and encoding 14 9.2 Filter concept 24 9.3 Matching and matching rules . 24 9.4 Paging . 25 9.5 Hierarchical groups 25 9.6 The keyword concept of version 1 . 25 SECTION 1 VERSION
27、1.00 OF THE ITU-T E.115 PROTOCOL 27 10 Version 1 of the directory assistance protocol specification 27 10.1 Overview 27 10.2 Inquiry format . 27 10.3 Reply format . 33 SECTION 2 VERSION 2.00 AND 2.01 OF THE ITU-T E.115 PROTOCOL 40 11 Versions 2.00 and 2.01 of the directory assistance protocol specif
28、ication . 40 11.1 Overview 40 11.2 Inquiry format . 40 11.3 Reply format . 54 SECTION 3 VERSION 2.10 OF THE ITU-T E.115 PROTOCOL 68 12 Version 2.10 of the directory assistance protocol specification . 68 12.1 Overview 68 12.2 Convention for protocol diagrams 68 iv Rec. ITU-T E.115 (05/2010) Page 12.
29、3 Structure of ITU-T E.115 message . 69 13 DA transaction 69 13.1 Structure of DA inquiry/reply 69 13.2 DA inquiry header 70 13.3 DA inquiry data 74 13.4 DA reply . 82 13.5 DA reply header . 82 13.6 Subscriber reply data 84 13.7 Locality reply data 89 13.8 Business category reply data 90 13.9 Street
30、 reply data 91 13.10 County, state or province reply data . 92 14 Directory transaction 93 14.1 Directory list inquiry header . 93 14.2 Directory inquiry data . 94 14.3 Directory reply header 94 14.4 Directory reply data 95 15 Functionality List 96 15.1 Overview 96 15.2 Functionality inquiry header
31、. 96 15.3 Functionality list reply header 97 15.4 Functionality reply data 98 SECTION 4 UNDERLYING PROTOCOL SUPPORT . 108 16 Fixed header protocol (FHP) 108 16.1 Introduction 108 16.2 Security context 109 16.3 Negotiation result . 110 16.4 Data transfer phase . 110 16.5 Exception conditions 110 16.6
32、 Format of FHP protocol elements 111 16.7 Fields common for all message types . 111 16.8 Specific fields . 112 16.9 Use of the service provided by TCP . 113 17 Use of the service provided by the HTTP 114 17.1 Introduction 114 17.2 Support levels . 114 17.3 Use of the HTTP POST 115 17.4 Requested ser
33、vice and protocol version selection 115 17.5 Exception conditions 116 Rec. ITU-T E.115 (05/2010) v Page 18 Operators manual . 116 Annex A Directory assistance keywords of directory assistance protocol version 1 . 117 A.1 Functional keywords table 117 A.2 Descriptive keywords table 125 Annex B Direct
34、ory assistance protocol version 1 in ASN.1 . 126 Annex C Directory assistance protocol version 2.00 in ASN.1 128 Annex D Directory assistance protocol version 2.00 in XSD . 132 Annex E Directory assistance protocol version 2.01 in ASN.1 138 Annex F Directory assistance protocol version 2.01 in XSD .
35、 142 Annex G Directory assistance protocol version 2.10 in ASN.1 149 Annex H Directory assistance protocol version 2.10 in XSD . 157 Annex I Message codes for Recommendation ITU-T E.115 172 Appendix I NACE nomenclature 177 I.1 About NACE 177 I.2 NACE structure 177 I.3 NACE at work 177 I.4 Extract fr
36、om NACE 178 Appendix II Examples of BER encodings 179 II.1 Introduction 179 II.2 Example of ASN.1 BER encoding of the DA protocol version 1 179 Appendix III ISO/IEC 10646, UTF8-encoding and relationship with ISO/IEC 8859-x 182 III.1 Introduction 182 III.2 UCS transformation format 8 (UTF-8) . 182 II
37、I.3 BASIC LATIN and LATIN-1 SUPPLEMENT subsets . 183 III.4 LATIN EXTENDED-A subset and relationship to ISO/IEC 8859-2/3/4 185 III.5 CYRILLIC subset and relationship to ISO/IEC 8859-5 . 185 III.6 BASIC GREEK subset and relationship to ISO/IEC 8859-7 . 186 III.7 ISO/IEC 10646 ARABIC subset and relatio
38、nship to ISO/IEC 8859-6 188 Bibliography. 189 vi Rec. ITU-T E.115 (05/2010) Introduction A directory assistance (DA) service allows the public to acquire primarily telephone number information, but also information about e-mail addresses; worldwide web addresses (URLs); and other addressing informat
39、ion necessary for establishing communication. Service providers offering a DA service keep subscriber information typically in very efficient and elaborate databases. Service providers need to access each others databases to provide a global service. This Recommendation specifies the protocol, calle
40、d the DA protocol, to be used for DA information exchange among service providers. This Recommendation specifies two versions of the DA protocol: a) version 1 covers basic DA functionality using the ASN.1 basic encoding rules (BER) encoding as defined by b-ITU-T X.690; and b) version 2 covers some e
41、nhanced functions using XML encodings obtained either using the ASN.1 XML encoding rules (XER) or using the XSD (the same XML results in both cases). This version is in three different releases: 2.00 is provided as version 2 of the 2007 edition of this Recommendation; 2.01 was added in the 2008 edit
42、ion of this Recommendation, and it provides additional communications address support; 2.10 has been added into this edition of this Recommendation. It provides capabilities for announcing access to different directory systems and for announcing the capabilities of these directory systems. Version 1
43、 shall be supported. Support of version 2 is optional. Annex A, which is an integral part of this Recommendation, specifies the syntax and semantics of DA keywords for version 1, giving details on how an inquiry shall be processed and how supplementary information may be supplied in replies. Annex B
44、, which is an integral part of this Recommendation, gives the formal ASN.1 specification of version 1 of the DA protocol. Annex C, which is an integral part of this Recommendation, gives the formal ASN.1 specification of version 2.00 of the DA protocol. Annex D, which is an integral part of this Rec
45、ommendation, gives the formal XSD specification of version 2.00 of the DA protocol. Annex E, which is an integral part of this Recommendation, gives the formal ASN.1 specification of version 2.01 of the DA protocol. Annex F, which is an integral part of this Recommendation, gives the formal XSD spec
46、ification of version 2.01 of the DA protocol. Annex G, which is an integral part of this Recommendation, gives the formal ASN.1 specification of version 2.10 of the DA protocol. Annex H, which is an integral part of this Recommendation, gives the formal XSD specification of version 2.10 of the DA pr
47、otocol. Annex I, which is an integral part of this Recommendation, lists the message codes returned in replies, and it lists the conditions under which they are generated. Appendix I, which is not an integral part of this Recommendation, gives a short introduction to the NACE code used for referring
48、 to business categories. Appendix II, which is not an integral part of this Recommendation, gives examples of encoding of the version 1 directory assistance messages using the ASN.1 basic encoding rules. Appendix III provides tutorial material on ISO/IEC 10646, UTF8-encoding and relationship with IS
49、O/IEC 8859-x. Rec. ITU-T E.115 (05/2010) 1 Recommendation ITU-T E.115 Computerized directory assistance 1 Scope This Recommendation describes the principles, procedures and protocols to be followed on organizing and operating a computerized international directory assistance service. 2 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisio
