1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU M.1340 (02/2000) SERIES M: TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHON E CI RCU ITS, TELEGRAPHY, FACS I M I LE AND LEASED CIRCUITS International data transmission systems Perform
2、ance objectives, allocations and limits for international PDH leased circuits and supporting data transmission links and systems ITU-T Recommendation M. 1340 (Formerly CCITT Recommendation) ITU-T M-SERIES RECOMMENDATIONS TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHONE CIRC
3、UITS, TELEGRAPHY, FACSIMILE AND LEASED CIRCUITS Introduction and general principles of maintenance and maintenance organization International transm ission systems International telephone circuits Common channel signalling systems International telegraph systems and phototelegraph transmission Inter
4、national leased group and supergroup links International leased circuits Mobile telecommunication systems and services International public telephone network M. 1 O-M.299 M. 300-M. 559 M. 560-M. 759 M.760-M.799 M. 800-M. 899 M. 900-M. 999 M. 1 000-M. 1 O99 M.1100-M.1199 M. 1200-M. 1299 International
5、 data transmission systems M.13W-M.1399 Designations and information exchange International transport network Telecommunications management network Integrated services digital networks Common channel signalling systems M. 1400-M. 1 999 M. 2000-M. 2999 M. 3000-M. 3599 M. 3600-M. 3999 M.4000-M.4999 Fo
6、r further details, please rer to ITD-T List of Recommendations. ITU-T RECOMMENDATION M.1340 PERFORMANCE OBJECTIVES, ALLOCATIONS AND LIMITS FOR INTERNATIONAL PDH LEASED CIRCUITS AND SUPPORTING DATA TRANSMISSION LINKS AND SYSTEMS Summary This Recommendation is only applicable to international data tra
7、nsmission links and systems for PDH applications. The requirements described in this Recommendation should form the basis for all digital test measurements associated with these types of applications. The performance limits are also applicable to the international portions of international leased ci
8、rcuits that are supported by an international data transmission system and that have a PDH digital interface at the Customers premises. Allocations of performance between international and national portions are covered, but those between Network Operators within the national portion require further
9、study. Recommendations M. 1370 and M. 1375 describe the Bringing-Into-Service and Maintenance procedures respectively for international data transmission links and systems, while Recommendations M. 13 80 and M. 13 85 describe similar procedures for international PDH leased circuits supported by thos
10、e systems. These Recommendations are to be applied in conjunction with the performance objectives, allocations and limits described in this Recommendation. This Recommendation addresses the performance of leased circuits with a PDH digital presentation at the Customers premises. Another Recommendati
11、on is being developed for performance of SDH leased circuits. For leased circuits with an analogue presentation, the performance limits of Recommendations M. 1020, M. 1025 or M. 1040 are applied as appropriate. Source ITU-T Recommendation M.1340 was revised by ITU-T Study Group 4 (1997-2000) and was
12、 approved under the WTSC Resolution No. 1 procedure on 4 February 2000. Keywords In-service monitoring, international data transmission system, international leased circuit, international section, national section, performance objective, performance allocation, performance limits, performance parame
13、ters, test duration. Recommendation M.1340 (02/2000) i FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is responsible
14、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 four years, establishes the topics for study by the ITU-T
15、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 fall within ITU-Ts purview, the necessary standards ar
16、e 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 The ITU draws attention to the possibility th
17、at 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 asserted by ITU members or others outside of the Recomm
18、endation 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 cautioned that this may not represent the latest informat
19、ion and are therefore strongly urged to consult the TSB patent database. o ITU 2000 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 fi-om the ITU.
20、 11 Recommendation M.1340 (02/2000) CONTENTS 1 2 3 4 5 5.1 5.2 5.3 5.4 5.5 6 6.1 6.2 6.3 6.4 7 7.1 7.2 8 9 Scope . References . Terms and definitions . Abbreviations Basic principles . Operational procedures . Performance events and parameters Derivation of performance objectives. allocation and lim
21、its Data rates below primary rate Test duration and error phenomena 5.3.1 5.3.2 Data rates at primary rate and above Action on test failure . Error performance allocation principles and test limits Overall performance allocation (link terminating point-to-link terminating point) . Calculation of ove
22、rall performance limits Calculation of portion performance limits Portion performance allocation (between MPs) . Short duration test objectives Maintenance test limits . BIS test limits In-Service Monitoring (ISM) of performance . Tables under study Appendix I . Guidelines for performance allocation
23、s of the national circuit portions of an international leased circuit I . 1 Scope . 1.2 Basic principles . Data rates below primary rate 1.2.1 1.2.2 Data rate at the primary rate and higher rates Error performance allocation principles . 1.3 1.3.1 Performance allocation I . 3.2 Portion performance a
24、llocation Short duration test objectives 1.4 1.5 In-service performance monitoring . Page 1 1 3 3 4 4 4 4 5 5 5 5 6 6 7 8 8 8 9 9 9 17 18 18 18 18 18 20 20 20 22 22 . Recommendation M.1340 (02/2000) 111 Recommendation M.1340 PERFORMANCE OBJECTIVES, ALLOCATIONS AND LIMITS FOR INTERNATIONAL PDH LEASED
25、 CIRCUITS AND SUPPORTING DATA TRANSMISSION LINKS AND SYSTEMS (Published 1993, revised in 1996 and 2000) 1 Scope This Recommendation is only applicable to international data transmission links and systems for PDH applications. The requirements described in this Recommendation should form the basis fo
26、r all digital test measurements associated with these types of applications. The performance limits are also applicable to the international portions of international leased circuits that are supported by an international data transmission system and that have a PDH digital interface at the Customer
27、s premises. Allocations of performance between international and national portions are covered, but those between Network Operators/Service Providers within the national portion require further study. This Recommendation addresses the performance of leased circuits with a PDH digital presentation at
28、 the Customers premises. Another Recommendation is being developed for performance of SDH leased circuits. For leased circuits with an analogue presentation, the procedures described in Recommendation M. 1060 1 11 and performance limits of Recommendations M. 1020 7, M. 1025 8 or M. 1040 9 are applie
29、d as appropriate. The limits described in this Recommendation represent a typical minimum level of performance and Network Operators/Service Providers should apply practical experience and negotiation to mutually agree more stringent limits whenever feasible. However, it should be recognized that th
30、e performance limits described may not be achieved by certain existing transmission equipment technologies. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of pub
31、lication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list
32、 of the currently valid ITU-T Recommendations is regularly published. 11 ITU-T Recommendation G.701 (1993), Vocabulary of digital transmission and multiplexing, and pulse code modulation (PCM) terms. 2 ITU-T Recommendation G. 82 1 (1 996), Error performance of an international digital connection ope
33、rating at a bit rate below the primary rate and formingpart of an integrated services digital network. 3 ITU-T Recommendation G.826 (1999) Error peflormance parameters and objectives for international, constant bit rate digital paths at or above the primary rate. 4 CCITT Recommendation M.20 (1 992),
34、 Maintenance philosophy for telecommunication networks. 5 CCITT Recommendation M.34 (1 988), Peflormance monitoring on international transmission systems and equipment. Recommendation M.1340 (02/2000) 1 91 2 ITU-T Recommendation M.60 (1 993), Maintenance terminoloa and deflnitions. ITU-T Recommendat
35、ion M. 1020 (1 993), Characteristics of special quality international leased circuits with special bandwidth conditioning. ITU-T Recommendation M. 1025 (1 993), Characteristics of special quality international leased circuits with basic bandwidth conditioning. CCITT Recommendation M. 1040 (1 988), C
36、haracteristics of ordinary quality international leased circuits. ITU-T Recommendation M. 1045 (1996), Preliminary exchange of information for the provision of international leased circuits and international data transmission systems. CCITT Recommendation M. 1060 (1988), Maintenance of international
37、 leased circuits. ITU-T Recommendation M. 1300 (1997), Maintenance of international data transmission systems operating in the range 2.4 kbith to 140 Mbith. ITU-T Recommendation M. 1370 (1 998), Bringing-into-service of international data transmission systems. ITU-T Recommendation M. 1375 (1998), Ma
38、intenance of international data transmission systems. ITU-T Recommendation M. 13 80 (2000), Bringing-into-service of international leased circuits that are supported by international data transmission systems. ITU-T Recommendation M. 1385 (2000), Maintenance of international leased circuits that are
39、 supported by international data transmission systems. ITU-T Recommendation M. 1400 (2000), Designations for inter operator networks. CCITT Recommendation M. 15 1 O (1 992), Exchange of contact point information for the maintenance of international services and the international network. ITU-T Recom
40、mendation M. 1530 (1999), Network maintenance information. ITU-T Recommendation M. 1535 (1996), Principles for maintenance information to be exchanged at the customer contact point (WICC). ITU-T Recommendation M. 1537 (1997), Deflnition of maintenance information to be exchanged at customer contact
41、point (WICC). ITU-T Recommendation M. 1539 (1999), Management of the grade of network maintenance services at the maintenance service customer contact point WSCC). ITU-T Recommendation M. 1540 (1994), Exchange of information for planned outages of transmission systems. CCITT Recommendation M. 1560 (
42、1 992), Escalation procedure for international leased circuits. ITU-T Recommendation M.2 1 O0 (1 995), Performance limits for bringing-into-service and maintenance of international PDHpaths, sections and transmission systems. Recommendation M.1340 (02/2000) 3 Terms and definitions Recommendation M.
43、1300 121 provides general descriptions of international data transmission systems. Terminology and definitions relating to this Recommendation are provided in Recommendations G.701 11 and M.60 6. For the purposes of this Recommendation, the following definitions of an international digital leased ci
44、rcuit and Service Level Agreement (SLA)/Contract 3.1 international digital leased circuit: The digital path between two Network Terminating Equipments (NTEs). The digital leased circuit may be bidirectional or unidirectional and its end points are at the boundaries between the Network Operator/Servi
45、ce Provider and the Customer. The NTEs may be owned by the Network Operator/Service Provider or owned by the Customer. 3.2 SLMContract: A set of appropriate procedures and targets formally or informally agreed between Network Operators/Service Providers or between Network Operators/Service Providers
46、 and Customers, in order to achieve and maintain specified Quality of Service (QoS) in accordance with ITU (ITU-T and ITU-R) Recommendations. The SLA may be an integral part of the Contract. These procedures and targets are related to specific circuithervice availability, error performance, Ready Fo
47、r Service (RFS) date, Mean Time Between Failures (MTBF), Mean Time to Restore Service (MTRS), Mean Time To Repair (MTTR). apply: 4 Abbreviations This Recommendation uses the following abbreviations: BIS Bringing-Into-Service CSES Consecutive Severely Errored Second ES Errored Second FS Frontier Stat
48、ion HRX Hypothetical Reference Connection ISM In-Service Monitoring LTP Link Terminating Point MP Measurement Point MTBF Mean Time Between Failures MTRS Mean Time to Restore Service MTTR Mean Time To Repair NTE 00s PCM PDH QOS RFS RPO SDH SEP SES Network Terminating Equipment Out-Of- Service Pulse C
49、ode Modulation Plesiochronous Digital Hierarchy Quality of Service Ready For Service Reference Performance Objective Synchronous Digital Hierarchy Severely Errored Period Severely Errored Second Recommendation M.1340 (02/2000) 3 SLA Service Level Agreement TIC Terminal International Centre TMN Telecommunications Management Network TNC Terminal National Centre UTC Coordinated Universal Time 5 Basic principles 5.1 Operational procedures Recommendation M. 1370 131 covers the setting up and Bringing-Into-Service (BIS) of international data transmission systems, w
