1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU M.1340 Corrigendum I (08/2001) SERIES M: TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, . TELEPHONE CIRCUITS, TELEGRAPHY, FACSIMILE AND LEASED CIRCUITS International data transmission system
2、s Performance objectives, allocations and limits for international PDH leased circuits and supporting data transmission links and systems Corrigendum I ITU-T Recommendation M. 1340 - Corrigendum 1 (Formerly CCIlT Recommendation) ITU-T M-SERIES RECOMMENDATIONS TMN AM) NETWORK MAINTENANCE: INTERNATION
3、AL TRANSMISSION SYSTEMS, TELEPHONE CIRCUITS, TELEGRAPHY, FACSIMILE AND LEASED CIRCUITS Introduction and general principles of maintenance and maintenance organization International transmission systems International telephone circuits Common channel signalling systems International telegraph systems
4、 and phototelegraph transmission International leased group and supergroup links Intemational leased circuits Mobile telecommunication systems and services International public telephone network International data transmission systems Designations and information exchange Intemational transport netw
5、ork Telecommunications management network Integrated services digital networks Common channel signalling systems M. 10-M.299 M.560-M.759 M.800-M.899 M.1000-M.1099 M. 1 100-M. 1199 M. 1200-M.1299 M. 1300-M. 1399 M.1400-M.1999 M.3000-M.3599 M.3600-M.3999 M.4000-M.4999 M.300-M.559 M.760-M.799 M.900-M.9
6、99 M.2000-M.2999 II! For further details, please refer to the list of ITU-TRecomrnendations. ITU-T Recommendation M.1340 Performance objectives, allocations and limits for international PDH leased circuits and supporting data transmission links and systems CORRIGENDUM 1 Summary This Corrigendum 1 to
7、 ITU-T M. 1340 modifies Table 3, Performance allocations for the derivation of performance limits for the international portion routed via a high-grade transmission path, corrects table referencing. Source Corrigendum 1 to ITU-T Recommendation M.1340 was prepared by ITU-T Study Group 4 (2001 -2004)
8、and approved under the WTSA Resolution 1 procedure on 13 August 2001. ITU-T M.1340/Cor.1(08/2001) 1 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 perm
9、anent 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, establi
10、shes 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 sta
11、ndards 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 PROPERTY RIGHTS ITU draws attention to the possibili
12、ty that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Properly Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recom
13、mendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implernentors are cautioned that this may not represent the latest informatio
14、n and are therefore strongly urged to consult the TSB patent database. O ITU 2002 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 ITU. 11 ITU
15、-T M.1340/Cor.l (08/2001) CONTENTS Page Clauses 6.1, 6.3 and 6.4 1 Table 3 1 1) 2) ITU-T M . 13 40/C o r . 1 (OW200 1) . 111 ITU-T Recommendation M.1340 International link portion component Terrestrial (including transit and non-optical Distance “d“ (km) d I500 500 c d I 1000 1000 500 1) Clauses 6.1
16、,6.3 and 6.4 Change references to “Table 2“ in thirdparagraph of 6.1, 6.3 and 6.4 to “Table 3“. 1 2.5 2) Table 3 Replace Table 3M.1340 with the following version: Table 3M.1340 - Performance allocations for the derivation of performance limits for the international portion routed via a high-grade tr
17、ansmission path 2500 7500 6 8 10 - Optical undersea cable Satellite I I 20 I - NOTE 1 - By negotiation, where sectional testing incorporates a terrestrial border crossing, it may be acceptable to incorporate an additional performance allocation (see Notes 3 and 4 in Table 2bM.2 1 O0 25); an allocati
18、on of 0.5% is suggested. NOTE 2 - The allocations given in this table are maximum values and may be reduced by agreement between Network Operators/Service Providers. This ensures the correct performance allocation for distances up to 500 km. ITU-T M. 1340K or.1 (08/2001) 1 SERIES OF ITU-T RECOMMENDA
19、TIONS 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 Series V Series X Series Y Series Z Organization of the work of ITU-T Means of expression: definitions, s
20、ymbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia sys
21、tems Integrated services digital network Cable networks and transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international tran
22、smission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling
23、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 infiastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 2002
