ITU-T F 32-1995 Telegram Destination Indicators - Operations and Quality of Service - Telegraph Services (Study Group 1) 10 pp《电报目的地指示器 操作和服务质量 电报业务(研究1组)10pp》.pdf
《ITU-T F 32-1995 Telegram Destination Indicators - Operations and Quality of Service - Telegraph Services (Study Group 1) 10 pp《电报目的地指示器 操作和服务质量 电报业务(研究1组)10pp》.pdf》由会员分享,可在线阅读,更多相关《ITU-T F 32-1995 Telegram Destination Indicators - Operations and Quality of Service - Telegraph Services (Study Group 1) 10 pp《电报目的地指示器 操作和服务质量 电报业务(研究1组)10pp》.pdf(10页珍藏版)》请在麦多课文档分享上搜索。
1、 ITU-T RECflNUF.32 95 D rib25L ObOBOBb 35b m INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU OPERATIONS AND QUALITY OF SERVICE TELEGRAPH SERVICES F.32 (1 0/95) TELEGRAM DESTINATION INDICATORS ITU-T Recommendation F.32 (Previously “CCITT Recommendation”) 1T
2、U-T RECMN*F.32 95 = 4862591 Ob014087 292 E FOREWORD The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (U). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen- dations on them with a
3、 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 the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recom
4、mendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12, 1993). ITU-T Recommendation F.32 was prepared by ITU-T Study Group 1 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 3rd of October 1995. NOTE In
5、 this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1996 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or me
6、chanical, including photocopying and microfilm, without permission in writing from the ITU. ITU-T RECMN+F=32 95 W 4862593 Ob08088 129 W CONTENTS Page 1 Background and scope . 1 2 References and terminology . 1 3 Code structure 1 4 Allocation of telegram network codes 2 5 Particular combinations for
7、office codes 4 6 Allocation of office codes 4 7 Registration and publication . 4 Recommendation F.32 (10195) 1 ITU-T RECMN*F.32 75 4862593 0608087 Ob5 SUMMARY The operation of the ?Telegram Retransmission System?, described in Recommendation F.3 depends on the use of a standard format in telegrams.
8、The format contains routing and other operational information in a heading part. This includes a four-letter ?destination indicator?, which is one of the key elements used for routing a telegram at switching centres in the origin country, and in any transit country(ies). They are also used for routi
9、ng in the destination country. This Recommendation lays down the general principles applying to the selection of destination indicators, the allocation of the indicators? four letters, the application of analogous two- and four-letter codes for certain other purposes in operating the telegram servic
10、e, procedures for changing or adding to code allocations and the timely promulgation of the information on codes to Recognized Operating Agencies (ROAS). 11 Recommendation F.32 (10/95) - - ITU-T RECMNUF.32 95 4862591 Ob08090 887 Recommendation F.32 TELEGRAM DESTINATION INDICATORS (Geneva, 1995) 1 Ba
11、ckground and scope 1.1 The operation of the “Telegram Retransmission System”, described in Recommendation F.3 1, depends on the use of a standard format in telegrams. The format contains routing and other operational information in a heading part. This includes a four-letter “destination indicator”,
12、 which is one of the key elements used for routing a telegram at switching centres in the origin country, and in any transit country(ies). They are also used for routing in the destination country. Depending on the arrangements in individual centres, other elements used for automatic or manual routi
13、ng include the origin indicator, the outgoing or incoming channel indicator and the office of destination. These elements are also used to provide the basis for the billing and accounting processes. For this and other operational reasons, the “F.3 1” format or its component parts are used when handl
14、ing telegrams other than via the Telegram Retransmission System. Destination indicators have wide applicability. 1.2 This Recommendation lays down the general principles applying to the selection of destination indicators, the allocation of the indicators four letters, the application of analogous t
15、wo-and four-letter codes for certain other purposes in operating the telegram service, procedures for changing or adding to code allocations and the timely promulgation of the information on codes to Recognized Operating Agencies (ROAS). 2 References and terminology 2.1 service and their relation wi
16、th other codes used in the international public telegram and telex services are: The Recommendations relevant to the allocation of codes, the use of destination indicators in the telegram - ITU-T Recommendation C.2 (1993). Collection and publication of oficial service information. - CCITT Recommenda
17、tion F.3 1 (1988), Telegram retransmission system. - CCITT Recommendation F.68 (1988), Establishment of the automatic intercontinental telex network. - CCITT Recommendation F.69 (1988), Plan for telex destination codes. 2.2 service. The service itself and the main operational arrangements are define
18、d in Recommendation F.1. Various technical and operational arrangements may be used to support the international public telegram 2.3 the two-letter parts of destination indicators are “Telegram Network Code” and “Office Code” (see clause 3). In accordance with the provisions in Recommendation F.31,
19、the terms used in this Recommendation to identify 3 Code structure 3.1 Each destination indicator consists of four-letters taken from the Latin alphabet. 3.2 (see Recommendation F.69). The two letters characterize either: The first two letters (the “telegram network code”) fulfil a function analogou
20、s to a telex destination code a) a particular destination country or geographical area; or b) a particular network in a destination country or geographical area, for cases where the origin office wishes to route a telegram to a particular network; or Recommendation F.32 (10/95) 1 c) where the office
21、 of origin has no special preference for the destination network, an “unrouted” combination, which allows a gateway or transit centre to select the actual network to be used, e.g. on a quota basis. 3.3 network identification code, this code should be the same as its telegram network code described i
22、n 3.2 above. In accordance with Recommendation F.68, where a ROA has been, or is to be, allocated a two-letter telex 3.4 The third and fourth letters (the “office code”) characterize, principally for routing purposes, either: a) the destination office shown in the address part of the telegram; or b)
23、 a centre that serves a number of destination offices in a region or district; or c) an “all others” indicator to cover those destinations not covered by a) and b) above; or d) certain applications related to the operation of the telegram service (see clause 4 below); or e) a single code covering al
24、l destinations except for the applications in d) above. 3.5 differs in at least two letters from any other indicator. As far as possible the whole of the four-letter destination indicators should be selected such that any indicator 3.6 The same four-letter code structure is used for destination and
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