1、INTERNATIONAL TELECOMMUNICATION UNION CCITT TH E INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE M.75 (1 0/92) MAINTENANCE: INTRODUCTION AND GENERAL PRINCIPLES OF MAINTENANCE AND MAINTENANCE ORGANIZATION TECHNICAL SERVICE Recommendation M.75 CCITT RECMN*Ne75 92 4862593 0576634 239 FOREW
2、ORD The CCIT (the International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union (ITU). CCIT is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecom
3、munications on a worldwide basis. The Plenary Assembly of CCIT which meets every four years, establishes the topics for study and approves Recommendations prepared by its Study Groups. The approval of Recommendations by the members of CCITT between Plenary Assemblies is covered by the procedure laid
4、 down in CCITI Resolution No. 2 (Melbourne, 1988). Recommendation M.75 was revised by Study Group IV and was approved under the Resolution No. 2 procedure on the 5th of October 1992. CCIT NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecomm
5、unication administration and a recognized private operating agency. O ITU 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. Recom
6、mendation M.75 TECHNICAL SERVICE (Published 1984: revised 1988,1992) Abstract This Recommendation defines the Technical Service within Administrations as an element of the maintenance organization. The Recommendation defines its general purpose, outlines its responsibilities, and identifies the need
7、 for exchange of contact point information. !3 - agreements; - maintenance; - planning; - policy; - provision; - technical service. 1 General 1.1 The term “technical service” (sometimes “technical services”) is used throughout the M-Series Recommen- dations. The term is used to indicate the appropri
8、ate authorities within an Administration which have responsibility for: making international agreements on technical and engineering aspects of provision and maintenance, allocating responsibilities to maintenance units within the same Administration, specifying provision and maintenance facilities,
9、 and determining provision and maintenance policy and overseeing its implementation. Thus it can be seen that the responsibilities of the technical service are at a higher administrative level than those of the staff concerned with day- to-day operation of international services. 1.2 The staff of th
10、e technical service is generally part of the central headquarters of the Administration. However, Administrations sometimes delegate some or all of their technical service responsibilities to regional centres or even operational maintenance units. In such cases the technical service remains responsi
11、ble for ensuring that the delegated responsibilities are satisfactorily carried out. 2 Outline of responsibilities As far as international cooperation and coordination are concerned, the responsibilities of the technical service are specified in various M-Series Recommendations. The following list,
12、which is not exhaustive, serves to illustrate the type of functions normally performed by the technical service of an Administration: making international agreements on the appointment of control and sub-control stations, and ensuring that the stations so appointed are advised accordingly; reaching
13、international agreements on all matters relating to the engineering provision of new and rearranged telephone circuits, leased circuits, etc.; digital blocks, paths, etc.; groups, supergroups, etc.; and so on; exchanging contact point and other maintenance information between Administrations; the es
14、calation procedure in Recommendation M.1550 i and M.1560 2 acting as a centraized escalation point for those fautts and problems which cannot be cleared by staff at maintenance units, even after discussions between the managers of such units. For example, escalation may be required where special tes
15、t equipment or specialized expertise is needed; - - - - Recommendation M.75 (10192) 1 - - ensuring the satisfactory preparation and execution of routine maintenance schedules; developing and keeping up to date plans for the restoration of service in the event of the failure of international transmis
16、sion systems; ensuring that other Administrations are advised of planned interruptions to transmission systems in its own country, and ensuring that steps are taken to minimize their effect on international services. - The functions mentioned above are based on responsibilities imposed on the techni
17、cal service by M-Series Recommendations. 3 Contact point information Contact point information for the technical service should be exchanged between Administrations in accordance with Recommendation M.1510 3. If the responsibilities of the technical service have been split on a functional basis, con
18、tact point information for each separate function should be exchanged. If technical service responsibilities have been delegated (as envisaged in 0 1.2 above), contact point information for the responsible central headquarters staff should be exchanged. References il CCIT Recommendation M. 1550 Escalation procedure. Pl CCITI Recommendation M. 1560 Escalation procedzrre for international leased circuits. 31 CCIIT Recommendation M. 1510 Exchange of contact point information for the maintenance of international services and intemational network 2 Recommendation M.75 (10192)
