1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TE LEC0 MM UN I CATI0 N STANDARDIZATION SECTOR OF ITU A.23 (1 0/2000) SERIES A: ORGANIZATION OF THE WORK OF ITU-T Collaboration with the International Organization for Standardization (EO) and the International Electrotechnical Commission (IEC) on informat
2、ion technology ITU-T Recommendation A.23 (Formerly CCITT Recommendation) ITU-T Recommendation A.23 Collaboration with the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) on information technology Source ITU-T Recommendation A.23 was prepar
3、ed by TSAG (1 997-2000) and approved by WTSA (27 September - 6 October 2000). ITU-T A.23 (10/2000) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a per
4、manent 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), which meets every four years, establ
5、ishes 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 within ITU-Ts purview, the necessary stan
6、dards 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 agency. O ITU 2001 All rights reserved. No part of this publication may be
7、 reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. Recommendation A.23 Collaboration with the International Organization for Standardization (ISO) and the International Electrotechnical Commissi
8、on (IEC) on information technology (Helsinki, 1993 amended at Geneva 1996, Montreal, 2000) The WTSA, considering 4 the purposes of the International Telecommunication Union set forth in Article 1 of its Constitution (Geneva, 1992) relating to the harmonization of telecommunication facilities; b) the
9、 duties of the Telecommunication Standardization Sector (Chapter III of the Constitution, Geneva, 1 992) of the International Telecommunication Union; 4 Resolution 7 (Geneva, 1996) recognizes common interests with IS0 and IEC concerning telecommunication and information technologies as well as some
10、other topics and cooperation with them by appropriate means, decides 1 that in accordance with Resolution 7, every effort should be made in establishing respective study programmes to identify overlapping studies with a view to avoiding duplication of work; 2 that for those subjects in the fields of
11、 information technology including data transmission, multimedia, open system communications and telematic services, etc., where there is a common interest and where it is agreed that coordination is desirable, then text should be drawn up mutually and kept aligned; 3 that in carrying on the respecti
12、ve studies, collaborative meetings at appropriate levels should be scheduled, where necessary. In drafting aligned text, it is necessary to take into account the respective timing for approvals and publication, particularly with the ISO/IEC Joint Technical Committee 1 (JTC 1) on Information Technolo
13、gy. A Guide for ITU-T and ISO/IEC JTC 1 Cooperation is given in Annex A, which contains a set of procedures for cooperation between the two sides. These procedures, which have also been adopted by ISO/IEC JTC 1, should be used, with flexibility, according to need. The “Rules for presentation of ITU-
14、T I ISO/IEC common text“ in Annex A should be respected in the drafting of common texts. The Guide is published as a separate booklet and is available from TSB. SERIES OF ITU-T RECOMMENDATIONS Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L
15、 Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z Organization of the work of ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation,
16、telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Cable networks and transmission of television, sound programme and other
17、 multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound
18、programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 2001
