ITU-T F.421-1988 消息处理业务:IPM业务与用户电报业务间的相互通信 Intercommunication between the IPM service and the telex service

pdf标准 ITU-T F.421-1988 消息处理业务:IPM业务与用户电报业务间的相互通信 Intercommunication between the IPM service and the telex service

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国外分类,ITU,ITU-T(电信标准分局),itu,消息,处理,业务,ipm,业务,用户,电报,用户电报,业务,相互,通信,intercommunication,between,the,ipm,service,and,the,telex,service

INTERNATIONAL TELECOMMUNICATION UNION )45 4 & TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU /0%2!4)/.3 !.$ 15!,)49 /& 3%26)#% -%33!'% (!.$,).' 3%26)#%3 -%33!'% (!.$,).' 3%26)#%3 ).4%2#/--5.)#!4)/. "%47%%. 4(% )03%26)#% !.$ 4(% 4%,%8 3%26)#% )45 4 Recommendation & (Extract from the "LUE "OOK) NOTES 1 ITU-T Recommendation F.421 was published in Fascicle II.6 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.4211) Fascicle II.6 - Rec. F.421 MESSAGE HANDLING SERVICES: INTERCOMMUNICATION BETWEEN THE IPM SERVICE AND THE TELEX SERVICE The establishment in various countries of message handling service in association with public networks creates the need to produce Recommendations covering the aspects of public message handling services. The CCITT, considering (a) the need for public message handling services; (b) the strategic and commercial importance of standardization of message handling services; (c) the urgent need for intercommunication arrangements for existing telematic services, and other services with public message handling services; (d) the need for a clear distinction between the responsibilities to be allocated to service providers and those of subscribers and/or users; (e) the need for establishing international compatibility between different messaging systems; (f) the growth of the installed base of terminals and personal computers with the ability to access message handling systems; (g) that several F-series Recommendations describe public message handling services; (h) that certain X, T and U-series Recommendations cover relevant aspects of systems used for the provision of messaging services; (i) that Recommendations F.60 and F.69 define the service requirements for the telex service; (j) that Recommendation F.72 defines international telex store-and-forward; (k) that the U-series Recommendations define the technical requirements for the telex service; (l) that Recommendation U.204 defines the technical requirements for the intercommunication between the IPM service and the telex service; unanimously declares that operational procedures for intercommunication between the public interpersonal messaging service and the telex service shall be in accordance with this Recommendation. CONTENTS 1 Scope 2 Introduction 3 Service outline 4 Operational procedures 4.1 IPM service to telex service direction 4.2 Telex service to IPM service direction 4.3 Construction of the IP-message _______________ 1) This Recommendation is the same as Recommendation F.75 of which only the title appears in Fascicle II.4. Fascicle II.6 - Rec. F.421 1 Annex A – Abbreviations Annex B – Actions to be taken by the PTLXAU/examples Annex C – IPM message to telex Annex D – Telex message to IPM 1 Scope 1.1 This Recommendation describes the general, operational and service procedures for the provision of intercommunication between the public interpersonal messaging service and the telex service. 1.2 The intercommunication is based on store-and-forward principles which allow users of one service to exchange messages with the users of the other service. 2 Introduction The IPM service is a messaging service which may be provided on a variety of networks and allows several forms of addresses, whereas the telex service provides direct connection between subscribers in the telex network. Therefore, to match dissimilar characteristics of the two services, it is necessary to provide intercommunication via a public telex access unit (PTLXAU). In both IPM service to telex service, and telex service to IPM service directions, the complete message is deposited in the PTLXAU for onward transmission. In general the selection procedures for the telex subscriber will be two-stage; however, where the destination IPM service user is assigned a numeric address that is part of the national telex numbering plan of the destination country, one-stage selection procedures may be used. 3 Service outline 3.1 Communication between subscribers of the telex service and the IPM service is on store-and-forward basis; thus conversational mode interworking between users is not ap

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