ITU-T F.68-1988 自动洲际用户电报网的建立 Establishment of the automatic intercontinental telex network

pdf标准 ITU-T F.68-1988 自动洲际用户电报网的建立 Establishment of the automatic intercontinental telex network

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ITU-T F.68-1988 自动洲际用户电报网的建立 Establishment of the automatic intercontinental telex network 第 1 页 ITU-T F.68-1988 自动洲际用户电报网的建立 Establishment of the automatic intercontinental telex network 第 2 页 ITU-T F.68-1988 自动洲际用户电报网的建立 Establishment of the automatic intercontinental telex network 第 3 页 ITU-T F.68-1988 自动洲际用户电报网的建立 Establishment of the automatic intercontinental telex network 第 4 页 ITU-T F.68-1988 自动洲际用户电报网的建立 Establishment of the automatic intercontinental telex network 第 5 页
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国外分类,ITU,ITU-T(电信标准分局),itu,自动,洲际,用户,电报,用户电报,建立,establishment,of,the,automatic,intercontinental,telex,network

INTERNATIONAL TELECOMMUNICATION UNION )45 4 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU /0%2!4)/.3 !.$ 15!,)49 /& 3%26)#% 4%,%'2!0( 3%26)#%3 %34!",)3(-%.4 /& 4(% !54/-!4)# ).4%2#/.4).%.4!, 4%,%8 .%47/2+ )45 4 Recommendation & (Extract from the "LUE "OOK) & NOTES 1 ITU-T Recommendation F.68 was published in Fascicle II.4 of the Blue Book. This file is an extract from the Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, the contents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below). 2 In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. © ITU 1988, 1993 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. Recommendation F.68 Fascicle II.4 - Rec. F.68 ESTABLISHMENT OF THE AUTOMATIC INTERCONTINENTAL TELEX NETWORK 1 Preamble – Definitions connected with the numbering of telex subscribers and the routing of telex and gentex calls in intercontinental service These definitions are proposed to facilitate the reading of recommendations and surveys on the question of intercontinental telex and gentex traffic; they have been derived to large extent from the definitions submitted by telephone experts for studying the analogous problem in intercontinental telephone operation and adapted to the special features of the telex and gentex services. Preliminary note – The word continent is not necessarily used in its geographical sense: traffic characteristics may cause countries of geographically different continents to be included in one continent (within the meaning of these definitions). 1.1 Circuits 1.1.1 A national circuit is one connecting two exchanges in the same country. 1.1.2 An international circuit is one connecting two exchanges in different countries, whether or not they are in different continents. 1.1.3 A continental circuit is one established between two exchanges in the same continent. 1.1.4 An intercontinental circuit is one connecting two exchanges situated in different countries in different continents. 1.1.5 An intercontinental transit circuit is an intercontinental circuit used primarily for routing intercontinental transit traffic. 1.2 Exchanges 1.2.1 A national exchange is the termination centre for national circuits only. 1.2.2 An international exchange is a centre where international circuits, and in general national circuits, terminate. 1.2.3 A continental exchange is an international centre where the international circuits terminating there are solely continental circuits. 1.2.4 intercontinental transit exchange: An exchange of this type would be directly connected to intercontinental transit circuits and would provide facilities to interconnect intercontinental transit circuits and trunks to terminal exchanges. It would also provide facilities for the interconnection of intercontinental transit circuits. 1.2.5 terminal international exchange: An international exchange of this type would not be connected directly to intercontinental transit circuits, but would gain access to the intercontinental transit network through one (or more) intercontinental transit exchanges. 1.3 Connections 1.3.1 international connection: Any connection between two stations situated in different countries, whether established between different continents or one continent. 1.3.2 continental connection: Connection established between stations within the same continent. 1.3.3 intercontinental connection: Connection established between two different continents. Fascicle II.4 - Rec. F.68 1 1.4 Numbering 1.4.1 subscriber’s national telex number: Set of figures to be selected by a caller in the same country to obtain this subscriber. 1.4.2 local number: In national telex networks, when abridged call numbers are used for local or short-distance traffic, the abridged number is called the local number. 1.4.3 prefix giving access to the long-distance automatic telex network: In national telex networks, when abridged call numbers are used for local or short-distance traffic, an access prefix should be selected to give access to the higher level network (long-distance level). 1.4.4 prefix giving access to the international automatic telex network: This expression is taken to mean the digit or digits that a subscriber must select (if necessary after the prefix giving access to the automatic long-distance telex network) to obtain access to the automatic telegraph switching equipment for international

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