1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T M.1301 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2001) SERIES M: TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHONE CIRCUITS, TELEGRAPHY, FACSIMILE AND LEASED CIRCUITS International data transmission systems General descr
2、iption and operational procedures for international SDH leased circuits ITU-T Recommendation M.1301 (Formerly CCITT Recommendation) ITU-T M-SERIES RECOMMENDATIONS TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHONE CIRCUITS, TELEGRAPHY, FACSIMILE AND LEASED CIRCUITS Introducti
3、on and general principles of maintenance and maintenance organization M.10M.299 International transmission systems M.300M.559 International telephone circuits M.560M.759 Common channel signalling systems M.760M.799 International telegraph systems and phototelegraph transmission M.800M.899 Internatio
4、nal leased group and supergroup links M.900M.999 International leased circuits M.1000M.1099 Mobile telecommunication systems and services M.1100M.1199 International public telephone network M.1200M.1299 International data transmission systems M.1300M.1399 Designations and information exchange M.1400
5、M.1999 International transport network M.2000M.2999 Telecommunications management network M.3000M.3599 Integrated services digital networks M.3600M.3999 Common channel signalling systems M.4000M.4999 For further details, please refer to the list of ITU-T Recommendations. ITU-T M.1301 (01/2001) i ITU
6、-T Recommendation M.1301 General description and operational procedures for international SDH leased circuits Summary This Recommendation provides a general description of international synchronous digital leased circuits with an SDH presentation to the Customer, and of the basic requirements for th
7、eir effective operation. The case of mixed SDH/PDH leased circuits is also described. Source ITU-T Recommendation M.1301 was prepared by ITU-T Study Group 4 (2001-2004) and approved under the WTSA Resolution 1 procedure on 19 January 2001. Keywords Digital leased circuit, digital path, international
8、 synchronous digital leased circuit, network termination equipment, path OverHead (POH), path terminating equipment, path termination point, section OverHead (SOH), synchronous Digital Hierarchy (SDH), trail, trail Termination Point (TTP). ii ITU-T M.1301 (01/2001) FOREWORD The International Telecom
9、munication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them wi
10、th a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Rec
11、ommendations 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 standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for
12、conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no
13、 position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property,
14、protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2001 All rights reserved. No part of this publication may be r
15、eproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T M.1301 (01/2001) iii CONTENTS Page 1 Scope. 1 2 References. 1 3 Terms and definitions . 4 4 Abbreviations 4 5 General description of intern
16、ational synchronous digital leased circuits . 6 5.1 Leased circuit configuration . 6 5.2 Network interfaces 8 5.3 Timing and network synchronization . 9 5.4 Designations 9 5.5 Performance 9 6 Operational procedures . 9 6.1 Control and sub-control stations. 10 6.2 BIS procedures 10 6.2.1 Section-by-s
17、ection testing and In-Service Monitoring (ISM) . 11 6.2.2 National circuit portions 11 6.2.3 International circuit portions . 11 6.2.4 BIS using an alternative international link 12 6.2.5 End-to-end test. 12 6.2.6 Alternative end-to-end test 12 6.3 Maintenance procedures . 13 6.3.1 Performance monit
18、oring and data collection. 13 6.3.2 Performance history, thresholding and reporting 14 6.3.3 Maintenance intervention tests 14 6.3.4 Test configurations 15 6.3.5 Test access at DCS equipment. 15 6.3.6 Returning-to-service tests 15 6.3.7 Planned maintenance . 15 7 Maintenance records . 16 8 Protectio
19、n and reserve arrangements 16 Annex A Fault management . 16 A.1 Initial reception of a fault report . 16 A.2 Fault information exchange 17 A.3 Fault localization. 18 iv ITU-T M.1301 (01/2001) Page A.4 Circuit restoration . 19 A.5 Temporary service restoration 19 A.5.1 Mechanisms for implementing tem
20、porary service restoration 19 A.5.2 Time to restore service 19 A.5.3 Restoration procedure 20 A.5.4 Returning to normal routing 20 A.5.5 Information that should be exchanged. 20 A.6 Automatic rerouting of international SDH transmission links . 20 A.7 Precautions to be taken in the use of DCSs 20 ITU
21、-T M.1301 (01/2001) 1 ITU-T Recommendation M.1301 General description and operational procedures for international SDH leased circuits 1 Scope This Recommendation defines international synchronous digital leased circuits with an SDH presentation to the Customer (hereafter called SDH leased circuits)
22、 which are transported via STM-N transmission links over a variety of transmission media using a number of network technologies. The case of mixed SDH/PDH leased circuits is also described. 2 References The following ITU-T Recommendations and other references contain provisions which, through refere
23、nce in this text, constitute provisions of this Recommendation. At the time of publication, 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 mo
24、st recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. 1 ITU-T G.701 (1993), Vocabulary of digital transmission and multiplexing and Pulse Code Modulation (PCM) terms. 2 ITU-T G.703 (1998), Physical/elec
25、trical characteristics of hierarchical digital interfaces. 3 ITU-T G.707/Y.1322 (2000), Network node interface for the synchronous digital hierarchy (SDH). 4 ITU-T G.708 (1999), Sub STM-0 network node interface for the synchronous digital hierarchy (SDH). 5 ITU-T G.783 (2000), Characteristics of syn
26、chronous digital hierarchy (SDH) equipment functional blocks. 6 ITU-T G.784 (1999), Synchronous digital hierarchy (SDH) management. 7 ITU-T G.803 (2000), Architectures of transport networks based on the synchronous digital hierarchy (SDH). 8 ITU-T G.811 (1997), Timing characteristics of primary refe
27、rence clocks. 9 ITU-T G.812 (1998), Timing requirements of slave clocks suitable for use as node clocks in synchronization networks. 10 ITU-T G.822 (1988), Controlled slip rate objectives on an international digital connection. 11 ITU-T G.823 (2000), The control of jitter and wander within digital n
28、etworks which are based on the 2048 kbit/s hierarchy. 12 ITU-T G.824 (2000), The control of jitter and wander within digital networks which are based on the 1544 kbit/s hierarchy. 13 ITU-T G.825 (2000), The control of jitter and wander within digital networks which are based on the synchronous digit
29、al hierarchy (SDH). 14 ITU-T G.826 (1999), Error performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate. 2 ITU-T M.1301 (01/2001) 15 ITU-T G.827 (2000), Availability parameters and objectives for path elements of international constant b
30、it-rate digital paths at or above the primary rate. 16 ITU-T G.828 (2000), Error performance parameters and objectives for international constant bit rate synchronous digital paths. 17 ITU-T G.841 (1998), Types and characteristics of SDH network protection architectures. 18 ITU-T G.842 (1997), Inter
31、working of SDH network protection architectures. 19 ITU-T G.957 (1999), Optical interfaces for equipments and systems relating to the synchronous digital hierarchy (SDH). 20 ITU-T I.432.1 (1999), B-ISDN user-network interface Physical layer specification: General characteristics. 21 ITU-T I.432.2 (1
32、999), B-ISDN user-network interface Physical layer specification: 155 520 kbit/s and 622 080 kbit/s operation. 22 ITU-T I.432.3 (1999), B-ISDN user-network interface Physical layer specification: 1544 kbit/s and 2048 kbit/s operation. 23 ITU-T I.432.4 (1999), B-ISDN user-network interface Physical l
33、ayer specification: 51 840 kbit/s operation. 24 ITU-T I.432.5 (1997), B-ISDN user-network interface Physical layer specification: 25 600 kbit/s operation. 25 ITU-T M.20 (1992), Maintenance philosophy for telecommunication networks. 26 ITU-T M.34 (1988), Performance monitoring on international transm
34、ission systems and equipment. 27 ITU-T M.60 (1993), Maintenance terminology and definitions. 28 ITU-T M.85 (1992), Fault report points. 29 ITU-T M.90 (1988), Sub-control stations. 30 ITU-T M.1012 (1988), Circuit control station for leased and special circuits. 31 ITU-T M.1013 (1988), Sub-control sta
35、tion for leased and special circuits. 32 ITU-T M.1045 (1996), Preliminary exchange of information for the provision of international leased circuits and international data transmission systems. 33 ITU-T M.1340 (2000), Performance objectives, allocations and limits for international PDH leased circui
36、ts and supporting data transmission links and systems. 34 ITU-T M.1370 (1998), Bringing-into-service of international data transmission systems. 35 ITU-T M.1375 (1998), Maintenance of international data transmission systems. 36 ITU-T M.1380 (2000), Bringing-into-service of international leased circu
37、its that are supported by international data transmission systems. 37 ITU-T M.1385 (2000), Maintenance of international leased circuits that are supported by international data transmission systems. 38 ITU-T M.1400 (2000), Designations for inter-operator networks. 39 ITU-T M.1510 (1992), Exchange of
38、 contact point information for the maintenance of international services and the international network. 40 ITU-T M.1520 (1992), Standardized information exchange between Administrations. 41 ITU-T M.1530 (1999), Network maintenance information. ITU-T M.1301 (01/2001) 3 42 ITU-T M.1532 (2000), Network
39、 maintenance service performance agreement (MSPA). 43 ITU-T M.1535 (1996), Principles for maintenance information to be exchanged at customer contact point (MICC). 44 ITU-T M.1537 (1997), Definition of maintenance information to be exchanged at customer contact point (MICC). 45 ITU-T M.1539 (1999),
40、Management of the grade of network maintenance services at the maintenance service customer contact point (MSCC). 46 ITU-T M.1540 (1994), Exchange of information for planned outages of transmission systems. 47 ITU-T M.1560 (1992), Escalation procedure for international leased circuits. 48 ITU-T M.21
41、00 (1995), Performance limits for bringing-into-service and maintenance of international PDH paths, sections and transmission systems. 49 ITU-T M.2101 (2000), Performance limits and objectives for bringing-into-service and maintenance of international SDH paths and multiplex sections. 50 ITU-T M.210
42、2 (2000), Maintenance thresholds and procedures for recovery mechanisms (protection and restoration) of international SDH VC trails (paths) and multiplex section. 51 ITU-T M.2110 (1997), Bringing-into-service of international PDH paths, sections and transmission systems and SDH paths and multiplex s
43、ections. 52 ITU-T M.2120 (2000), PDH path, section and transmission system and SDH path and multiplex section fault detection and localization procedures. 53 ITU-T M.2130 (2000), Operational procedures for the maintenance of the transport network. 54 ITU-T M.2140 (2000), Transport network event corr
44、elation. 55 ITU-T M.3010 (2000), Principles for a telecommunications management network. 56 ITU-T M.3208.1 (1997), TMN management services for dedicated and reconfigurable circuits network: Leased circuit services. 57 ITU-T M.3208.2 (1999), TMN management services for dedicated and reconfigurable ci
45、rcuits network: Connection management of pre-provisioned service link connections to form a leased circuit service. 58 ITU-T M.3208.3 (2000), TMN management services for dedicated and reconfigurable circuits network: Virtual private network service. 59 ITU-T M.3320 (1997), Management requirements fr
46、amework for the TMN X-interface. 60 ITU-T M.3300 (1998), TMN F-interface requirements. 61 ITU-T M.3400 (2000), TMN management functions. 62 ITU-T O.172 (2001), Jitter and wander measuring equipment for digital systems which are based on the synchronous digital hierarchy (SDH). 63 ITU-T O.181 (1996),
47、 Equipment to assess error performance on STM-N interfaces. 64 ITU-T V.54 (1988), Loop test devices for modems. 65 ITU-T X.150 (1988), Principles of maintenance testing for public data networks using Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) test loops. 66 ITU-T X.79
48、0 (1995), Trouble management function for ITU-T applications. 4 ITU-T M.1301 (01/2001) 67 ITU-T M.2101.1 (1997), Performance limits for bringing-into-service and maintenance of international SDH paths and multiplex sections.13 Terms and definitions General terminology and definitions relating to thi
49、s Recommendation are provided in ITU-T G.701 1 and ITU-T M.60 27. For the purposes of this Recommendation, the following definitions also apply: 3.1 SDH digital path: a subset of a Digital Trail carrying the SDH payload and associated Path OverHead (POH) through the layered transport network between the two Path Termination Points (PTPs) within the Path Terminating Equipment (PTE). The SDH digital path usually comprises both acc
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