1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU E.191 SERIES E: TELEPHONE NETWORK AND ISDN Operation, numbering, routing and mobile services - International operation - Tones in national signalling systems (1 0196) B-ISDN numbering and addressing ITU-T Rec
2、ommendation E.191 (Previously CClTT Recommendation) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesITU-T E-SERIES RECOMMENDATIONS TELEPHONE NETWORK AND ISDN QPERATION, NUMBERING, ROUTING AND MOBILE SERVICES NTERNATIONAL OPERATION Defin
3、itions General provisions concerning Administrations General provisions concerning users Operation of international telephone services Numbering plan of the international telephone service International routing plan OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELE
4、PHONE SERVICE Charging in the international telephone service Procedures for remuneration of Administrations for facilities made available Measuring and recording call durations for accounting purposes Establishment and exchange of international accounts UTILIZATION OF THE INTERNATIONAL TELEPHONE NE
5、TWORK FOR NON- TELEPHONY APPLICATIONS General Phototelegraphy ISDN PROVISIONS CONCERNING USERS E.100-E229 E. 1 OO-E. 103 E.104-E.119 E. 120-E. 139 E. 140-E. 159 E.160-E.169 E.170-E.179 E.200-E.229 E.230-E.299 E.230-E.249 E.250-E.259 E.260-E.269 E.270-E.299 E.300-E.329 E.300-E.319 E.320-E.329 E.330-E
6、.399 QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING NETWORK MANAGEMENT E.400-E.489 TRAFFIC ENGINEERING E.490-E.799 QUALITY OF TELECOMMUNICATION SERVICES: CONCEPTS, MODELS, OBJECTIVES AND DEPENDABILITY PLANNING E.800-E.899 For further details, please refer to ITU-T List of Recommendat
7、ions. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services STD*ITU-T RECMN E-171-ENGL 199b m qBb259L ObZbL39 432 ITU-T RECOMMENDATION E.191 B-ISDN NUMBERING AND ADDRESSING Summary This Recommendation provides numbering and addressing princi
8、ples in B-ISDN. This Recommendation is structured to give guidance on the different use of numbers and addresses in B -1SDN. Source RU-T Recommendation E. 19 1 was prepared by ITU-T Study Group 2 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 8th of October 1996. COPYR
9、IGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesFOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a p
10、ermanent organ of the ITU. The 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 Conference (WTSC), which meets every four y
11、ears, establishes the topics for study by 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 (Helsinki, March 1-12, 1993). In some areas of in
12、formation technology which fall within ITU-Ts purview, the necessary standards 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 a
13、gency. O ITU 1997 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 the ITU. 11 Recommendation E.191 (10196) COPYRIGHT International Telecommun
14、ications Union/ITU TelecommunicationsLicensed by Information Handling Services1 2 3 4 5 6 7 8 9 9.1 9.2 10 11 12 CONTENTS Scope References Terms and definitions Abbreviations . B-ISDN numbering and addressing basic principles . B-ISDN address . B-ISDN numbering plan Individual and group address . B-
15、ISDN addressing structures Structure A . Structure B . Interworking between public and private B-ISDN Service aspects of B-ISDN addressing schemes Recommendation history . Recommendation E.191 (10/96) Page 1 1 1 2 3 4 5 7 7 8 8 9 9 9 . 111 COPYRIGHT International Telecommunications Union/ITU Telecom
16、municationsLicensed by Information Handling Services! COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesRecommendation E.191 B-ISDN NUMBERING AND ADDRESSING (Geneva, 1996) 1 Scope This Recommendation provides guidance, principles and requ
17、irements for addressing reference points located at subscribers premises, servers allowing communications between terminals, applications and persons in B-ISDN networks. B-ISDN numbering and addressing is based on Recommendation E.164. Additional numbering and addressing requirements not covered in
18、Recommendation E.164 will be developed in this Recommendation. The reason for conforming to the E.164 numbering plan is based on the compatibility with existing network arrangements and the provision for uniform and ubiquitous access. The B-ISDN represents an interconnecting means for other networks
19、 supporting E.164 numbering plan or interworking with it (e.g. X.121). E.164 guarantees both backward compatibility and consistency for customers and network operators. There is also sufficient flexibility within E. 164 to allow the introduction of new services to meet future requirements. In additi
20、on, interworking mechanisms with other public numbering plans are already defined in Recommendation E.166K.122. 2 References The following Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publi
21、cation, the editions indicated were valid. All Recommendations and other references are subject to revision; all 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 o
22、f the currently valid ITU-T Recommendations is regularly published. - CCITT Recommendation E.164 (1991), Numberingplan for the ISDN era. - ITU-T Recommendation E. 166/X. 122, (1996), Numbering plan interworking for the E. 164 - RU-T Recommendation X.121 (1996), International numbering plan for publi
23、c data andXl2l numberingplans. networks. - ITU-T Recommendation X.2 13 (1 995) I ISO/IEC 8348: 1996, Information technology - Open Systems Interconnection - Network service definition. 3 Terms and definitions For the purposes of this Recommendation, the following definitions apply. 3.1 address: It d
24、escribes location information of an endpoint. In general addresses specify the location of an endpoint, but they do not necessarily imply geographic information. 3.2 number: The traditional addressing information in networks is a string of decimal digits and it is usually referred to as the number.
25、The syntax and semantic of a number are determined by the numbering plan in which it is allocated. The number identifies points of attachment of customer premises or private environment at the public network termination. In some cases the number identifies points beyond the public network terminatio
26、n (e.g. direct-dialling-in). Recommendation E.191 (10/96) 1 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services3.3 B-ISDN number: The B-ISDN number is the information that is used by the network to identify the B-ISDN interface. The B-ISDN
27、 number is an E. 164 number. 3.4 B-ISDN address: The B-ISDN address is the full address by which the communication entity is known and comprises the B-ISDN number and additional addressing information. 3.5 additional address: The additional address complements the information provided by the B-ISDN
28、number in order to identify the entity involved in the specific B-ISDN communication. The additional address is transported transparently by the public B-ISDN and it is not used for routing in the public B-ISDN. 3.6 subaddress: The subaddress is an addressing element that provides a means to convey
29、transparently additional address information through the public network. 3.7 ATM end system address: The ATM end system address is an address that uniquely identifies an ATM endpoint. 3.8 individual address: Individual address is an address identifying a single endpoint. 3.9 group address: The group
30、 address is a destination address identifying a number of recipients, each of them being accessed through the use of the unique “group“ identity. It represents a set of individual addresses, each of them being E. 164 numbers. 3.10 B-ISDN user: A B-ISDN user is a user attached to the B-ISDN network v
31、ia an interface at TB, coincident SB/“B or SB reference points. 3.11 reference configurations: Reference configurations are conceptual configurations useful in identifying various possible physical user access arrangements. Two concepts are used in defining reference configurations: reference points
32、 and functional groups. 3.12 functional groups: They are sets of functions which may be needed in user access arrangements. In a particular access arrangement, specific functions in a functional group may or may not be present. 3.13 reference points: The conceptual points dividing functional groups
33、are reference points. In a specific access arrangement, a reference point may correspond to a physical interface between pieces of equipment, or there may not be any physical interface corresponding to the reference point (virtual interface). 3.14 server: A server is a network element able to offer
34、some specific service (e.g. a connectionless server offers the connectionless data service to users). 4 Abbreviations For the purposes of this Recommendation, the following abbreviations are used: AESA ATM End System Address AFI Authority and Format Identifier ATM Asynchronous Transfer Mode B-ISDN B
35、roadband Integrated Services Digital Network B-NT2 Broadband-Network Termination 2 BCD Binary Coded Decimal BCDBS Broadband Connectionless Data Bearer Services CLSF ConnectionLess Service Functions 2 Recommendation E.191 (10/96) COPYRIGHT International Telecommunications Union/ITU Telecommunications
36、Licensed by Information Handling ServicesDDI DSP DI IDP ISDN MSN NSAP os1 PSTN TE UNI UPT 5 Direct-Dialling-In Domain Specific Part Initial Domain Identifier Initial Domain Part Integrated Services Digital Network Multiple Subscriber Number Network Service Access Point Open Systems Interconnection P
37、ublic Switched Telephone Network Terminal Equipment User-to-Network Interface Universal Personal Telecommunication B-ISDN numbering and addressing basic principles The aim of the B-ISDN address is to give information about the location of the entity involved in the specific B-ISDN communication. Exa
38、mples of such entities are networks elements, applications and interfaces. It is worth noting that the entities whose B-ISDN address specifies the location information can belong to the public domain or to the private environment. In particular the B-ISDN address can be used to identify interfaces i
39、n the private domain. The aim of the B-ISDN number is to identify points of attachment of customer premises or private environments at the public termination. B-ISDN number is analysed by the public network in order to route and charge the call. In some specific cases the B-ISDN number can be used t
40、o identify interfaces within the private domain. The use of the B-ISDN number to identify other kinds of interfaces corresponding to reference points not related to the attachment of the customer premises to the public network is for further study. An example of such interfaces are interfaces betwee
41、n two nodes, between a public network and a specialized node or between two public networks. The aim of the additional address of the B-ISDN address is to complete the information provided by the B-ISDN number in order to identify the entity involved in the specific B-ISDN communication as depicted
42、in Figure l. Recommendation E.191 (10/96) 3 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesW“- “_ - “-t _“- -“ -“ “ “ “ “ B-ISDN address “- - “- T020602096 TE Terminal Equipment UNI User-to-Network Interface TB Reference point defined
43、in the I-Series Recommendations FIGURE 1E.191 Scope of B-ISDN number and B-ISDN address 6 B-ISDN address In order to fulfil the principles described in clause 5 the structure depicted in Figure 2 has to be taken into consideration for B-ISDN addressing. B-ISDN number address I II I 1 B-ISDN address
44、TO20582096 FIGURE 2E. 19 1 B-ISDN address The B-ISDN address comprises the B-ISDN number and additional address information. The B-ISDN address is capable of identifying the entity involved in the specific communication application. In particular the B-ISDN number is used in the public network to de
45、termine routing, while the additional address is transported transparently. 4 Recommendation E.191 (10/96) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services7 B-ISDN numbering plan The B-ISDN number is a number related to B-ISDN and it fo
46、llows the rules and regulations defined in Recommendation E.164. Figure 3 depicts the B-ISDN number on the basis of Recommendation E. 164. 4 + International B-ISDN number 4 b National B-ISDN number 4 B-ISDN b Subscriber Number Partial / number Country J Subscriber National destination code Number co
47、de B-ISDN number TO206030-96 FIGURE 3E. 19 1 B-ISDN number The B-ISDN number is used to determine the route to the destination user-to-network interface in the public domain. The B-ISDN number is used to define the routing within the public domain. The B-ISDN number is used to identify both the orig
48、inating and the destination endpoints, and it shall unambiguously identify one or more of the following interfaces defined in the I-Series Recommendations: m a physical/virtual interface at TB reference point; m for point-to-point configurations, physical/virtual interface at SB/S and coincident SB/
49、TB reference points; 0 for multipoint configuration all interfaces at SB/S and coincident SB/TB reference points. When selecting a destination in the subscriber installation, the digits forming the B-ISDN number or the digits forming the end of the B-ISDN number may be transferred to the called subscriber installation as a partial number. The number of digits used depends upon the requirements of the called subscriber equipment and on the capacity of the numbering plan used. If the subscriber installation includes a B-NT2, the partial number will be used in the context of the D
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