1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Series A Supplement 2 (06/2000) SERIES A: ORGANIZATION OF THE WORK OF THE ITU-T Gu i del i nes on i n teropera b i I i ty ex per men ts ITU-T A-series Recommendations - Supplement 2 (Formerly CCITT Recommenda
2、tions) SUPPLEMENT 2 TO ITU-T A-SERIES RECOMMENDATIONS GUIDELINES ON INTEROPERABILITY EXPERIMENTS Summary These guidelines relate to interoperability experiments to be performed outside of ITU-T. The guidelines have been prepared in order to encourage such experiments to be performed and to facilitat
3、e information exchange between ITU-T and parties participating in such experiments. Source Supplement 2 to ITU-T A-series Recommendations was prepared by ITU-T TSAG (1997-2000) and was approved under the WTSC Resolution No. 5 procedure on 14 June 2000. Keywords Information exchange, Interoperability
4、 Experiment to be performed outside of ITU-T, Quality of Recommendations. A series - Supplement 2 (06/2000) 1 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is
5、a permanent 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 fou
6、r years, 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. In some areas of information technology which
7、 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 agency. INTELLECTUAL PROPER
8、TY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether
9、asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are ca
10、utioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2001 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
11、microfilm, without permission in writing fi-om the ITU. 11 A series - Supplement 2 (06/2000) CONTENTS Background . Objective . Guidelines . A series . Supplement 2 (06/2000) Page 1 1 1 . 111 Introduction These guidelines relate to interoperability experiments to be performed outside of ITU-T. The gu
12、idelines have been prepared to encourage such experiments to be performed and to facilitate information exchange between parties participating in such experiments and ITU-T study groups developing relevant Recommendation( s). iv A series - Supplement 2 (06/2000) Supplement 2 to A-series Recommendati
13、ons GUIDELINES ON INTEROPERABILITY EXPERIMENTS (Geneva, 2000) 1 Background 1.1 Study Groups of ITU-T have been doing their best to ensure interoperability of products made in accordance with ITU-T Recommendations. There is no better way to assess interoperability than to actually interoperate system
14、s and equipment of various manufacturers. ITU-T has occasionally initiated interoperability experiments for specific projects in the past. Some examples are: a) Signalling System No.7 Field Trial in early 1980s (SG 11). b) ISDN Field Trials in various places in late 1980s. (SG 1 1 and then SG 18). c
15、) Digital Circuit Multiplexing Equipment (DCME) in early 1990s (SG 15). 1.2 However, when interoperability experimentltesting has not been performed, users may have suffered fiom the lack of interoperability between products coming fiom different manufacturers. Moreover, manufacturers are not always
16、 members of ITU-T and develop their products only by reading relevant Recommendations. 2 Objective The objective of these guidelines is to encourage interoperability experiments to be performed outside of ITU-T and to facilitate information exchange between parties participating in such experiments
17、and study groups of ITU-T. 3 Guidelines 3.1 The interoperability experiments are to be performed outside of ITU-T on a voluntary basis, self-governed, self-supporting and incurring no additional cost to ITU-T. Such interoperability experiments may therefore involve non ITU-T members as well. 3.2 The
18、 self-governance of interoperability experiments to be performed outside of ITU-T means that parties participating in such an experiment should govern themselves by making rules of their own. ITU-T is in no way involved in such a rule making. 3.3 ITU-T would like to ask the kind cooperation of its m
19、embers participating in such an interoperability experiment to submit contributions to study groups based on the results of the experiment in order to improve the quality of Recommendations, e.g. by proposing text changes to remove ambiguities, etc. 3.4 Furthermore, ITU-T would like to ask the kind
20、cooperation of its members participating in such an experiment to share information on the experiment at study group meetings as much as possible. Examples of information that would be useful to be shared are as follows: - how should experiments be performed: experiment items, experiment methods, te
21、st - equipment, experiment schedules, coordinator, etc; where are the experiments going to be conducted; A series - Supplement 2 (06/2000) 1 2 how should experiment results be handled in order to submit contributions to ITU-T to improve the quality of Recommendations; identification of other activit
22、ies in the same area and potential cooperation and work-sharing with them. A series - Supplement 2 (06/2000) Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Se
23、ries V Series X Series Y Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human fact
24、ors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, inst
25、allation 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 programme and television transmission circuits Specifications of measu
26、ring 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
