1、 STD.ITU-T RECMN M-1370-ENGL 3998 m 4862593 Ob497b2 889 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STAN DARD IZAT I ON SECT0 R OF ITU M.1370 (06198) SERIES M: TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHONE CIRCUITS, TELEGRAPHY, FACSIMILE AND LEASED CIRC
2、UITS I n tern at i on al data t ransm ission systems B ri n g i n g -i n to-servi ce of i n te rnat i o n a I da ta trans m iss i on sys terns ITU-T Recommendation M. 1370 (Previously CCITT Recommendation) STD.ITU-T RECMN M.1370-ENGL 1998 W 4862591 0649763 715 ITU-T M-SERIES RECOMMENDATIONS TMN AND
3、NETWORK MAINTENANCE: INTERNATIONAL 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
4、 International telegraph systems and phototelegraph transmission International leased group and supergroup links International leased circuits Mobile telecommunication systems and services M.lO-M.299 M.300-M.559 M.560-M.759 M.760-M.799 M.800-M.899 M.900-M.999 M.1000-M.1099 M.1100-M.1199 Internationa
5、l public telephone network M. 1200-M. 1299 Internationai data on systems M.13OO-M.i399 I Designations and information exchange International transport network Telecommunications management network Integrated services digital networks Common channel signalling systems M. 1400-M. 1999 M.2000-M.2999 M.
6、3000-M.3599 M.3600-M.3999 M.4000-M.4999 For ficrther details, please refer to ITU-T List of Recommendations. STD-ITU-T RECMN 1.3370-ENGL 3998 4862573 0649764 653 ITU-T RECOMMENDATION M.1370 BRINGING-INTO-SERVICE OF INTERNATIONAL DATA TRANSMISSION SYSTEMS Summary This Recommendation describes bringin
7、g-into-service procedures for international data transmission systems with a PDH presentation. Source ITU-T Recommendation M.1370 was revised by ITU-T Study Group 4 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 26th of June 1998. Keywords Bringing-into-service, exchan
8、ge of information for bringing-into-service, international data transmission link, international data transmission system. Recommendation M.1370 (06/98) 1 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telec
9、ommunication Standardization Sector (ITU-T) is a permanent organ of the IT. 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 Standardiz
10、ation Conference (WTSC), which meets every four 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.
11、 In some areas of information technology which 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 re
12、cognized operating agency. INTELLECTUAL PROPERTY 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
13、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, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement thi
14、s Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electro
15、nic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation M.1370 (06/98) CONTENTS 8 9 10 Scope References Terminology and definitions Performance limits and objectives Preliminary exchange of information . Bringing-into-service procedures
16、for an international data transmission link Setting up and lining up individual link sections Abbreviations . 7.1 7.2 Setting up and testing procedures for national and international link sections . 7.3 Setting up and testing procedures for an overall international data transmission link Bringing-in
17、to-service procedures for an international data transmission system . 8.1 General 8.2 8.3 Multiplexing equipment interworking tests Local multiplexing equipment tests 8.4 System stability test . 8.5 System configuration tests 8.6 Introduction into service . System and link integration Measurement co
18、nfigurations Page 1 1 1 2 2 2 3 3 3 3 5 5 5 5 5 5 6 6 6 Recommendation M.1370 (06/98) . 111 Recommendation M.1370 BRINGING-INTO-SERVICE OF INTERNATIONAL DATA TRANSMISSION SYSTEMS (Published in 1984; revised in 1988, 1993 and 1998) 1 Scope The requirements described in this Recommendation should ensu
19、e that an international data transmission system is fully tested in terms of performance and interworking of multiplexing equipment1 prior to introduction into service. The bringing-into-service tests described in this Recommendation should ideally include periods of normal industrial activity to be
20、 representative of typical network conditions. 2 References The following ITU-T Recommendations contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other referen
21、ces 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 listed below. A list of the currently valid ITU-T Recommendations is regularly published. Il Pl 31 ITU-T Recommendation M.
22、1045 (1 996), Preliminary exchange of information for the provision of CCITT Recommendation M.20 (1 992), Maintenance philosophy for telecommunications networks. ITU-T Recommendation M.60 (1 993), Maintenance terminology and definitions. international leased circuits and international data transmiss
23、ion systems. ITU-T Recommendation M. 1300 (1 997), International data transmission systems operating in the range 2.4 kbitls to 140 Mbitls. 41 PI ITU-T Recommendation M.1340 (1 996), Performance allocations and limits for international data transmission links and systems. ITU-T Recommendation M. 13
24、80 (1 997), Bringing-into-service of international leased circuits that are supported by international data transmission systems. ITU-T Recommendation M. 1400 (1 997), Designations for international networks. ITU-T Recommendation M.211 O (1 997), Bringing-into-service of international digital paths,
25、 sections and transmission systems and SDH paths and multiplex sections. CCITT Recommendation O. 15 1 (1 992), Error performance measuring equipment operating at the primary rate and above. CCITT Recommendation O. 152 (1 992), Error performance measurement equipment for bit rates of 64 kbitls and N
26、x 64 kbitls. CCITT Recommendation O. 153 (1 992), Basic parameters for the measurement of error performance at bit rates below the primary rate. 161 71 Pl 91 1 O 1 i 3 Terminology and definitions Recommendation M. 13 O0 4 provides general descriptions of intemational data transmission links and inte
27、rnational data transmission systems. The term “multiplexing equipment“, as defined in Recommendation M.60 2, includes digital cross-connect equipment. Recommendation M.1370 (06/98) 1 STDeITU-T RECMN M.337O-ENGL 3998 U 4862593 O649768 2T7 Terminologies and definitions relating to this Recommendation
28、are provided in Recommendation M.60 2. 4 Abbreviations This Recommendation uses the following abbreviations: DXC ES LTP MUX PDH SES 5 Digital Cross-Connect Errored Second Link Terminating Point Multiplexing Equipment Plesiochronous Digital Hierarchy Severely Errored Second Performance limits and obj
29、ectives Recommendation M.1340 5 covers all performance limits and objectives associated with this Recommendation. For all performance tests described in this Recommendation, the Errored Second (ES) and Severely Errored Second (SES) limits should be met simultaneously for the test result to be consid
30、ered acceptable. 6 Preliminary exchange of information To assist in the setting-up and bringing-into-service of international data transmission systems, it is important that Network Operators/Service Providers exchange information (as detailed in Recommendation M. 1045 3) and agree as necessary on t
31、he following: i) ii) iii) iv) v) vi) 2 Multiplexing equipment interfacing and data structuring specifications that can confirm the likelihood of compatible interworking. An equipment configuration diagram showing connection arrangements and the location and interface types of test points. This diagr
32、am should include reference to the Link Terminating Point (LTP) and all channel test points. A schematic routing diagram that identifies the location of LTPs, earth stations, terrestrial frontier stations and terminal international centres showing approximate distances in kilometres (except for any
33、satellite sections or national link sections). This diagram should be used to calculate performance limits in accordance with Recommendation M.1340 5 (see 3.1M.1340 and Figure lh4.1340). Details of test equipment that will be used for normal provision and maintenance operations. Test equipment speci
34、fications should be compared to ensure a consistent interpretation of typical transmission error events. Pseudo-random test patterns to be used. These should be in accordance with Recommendations 0.1 5 1 9, 0.1 52 1 O and 0.1 53 1 11 as appropriate. (More severe test patterns that are available on s
35、ome test equipment may be used following bilateral agreement. However, it should be appreciated that certain pseudo-random test patterns may stress a transmission system beyond its original design specification.) A bringing-into-service schedule taking account of the test requirements and sequence o
36、f clauses 7 and 8 below. Dependent upon resource constraints, Network Operators/Service Providers may need to schedule testing several weeks or even months in advance of the proposed bringing-into-service date. Recommendation M.1370 (06/98) STDmITU-T RECMN M*1370-EHGL 1998 4862591 0649769 133 W vii)
37、 A designation in accordance with Recommendation M.1400 7. viii) Contact details for operational and planning personnel. ix) Network Operators/Service Providers should agree on a dual control or a control and sub-control relationship for the terminal stations of the international data transmission s
38、ystem (see clause 10/M.1300 4). The bringing-into-service information exchanged, as detailed above, should be retained for future reference. 7 Bringing-into-service procedures for an international data transmission link 7.1 Setting up and lining up individual link sections Individual link sections s
39、hould be set up or lined up as separate entities in accordance with the Recommendations and procedures appropriate to the transmission medium involved. Where an individual link section exists wholly within the network of a single Network Operator/Service Provider, the internal practices of that Netw
40、ork Operator/Service Provider may be used for setting up or lining up, provided that the limits used are consistent with the overall performance requirements for an international data transmission link. Where an individual link section is wholly contained within an existing data transmission system
41、that has already been extensively tested, Network Operators/Service Providers may agree to reduce this requirement to a short duration test of 15 minutes, with performance limits as given in Table 3/M. 1340 5. 7.2 Setting up and testing procedures for national and international link sections When su
42、ccessfully tested, the individual link sections described in 7.1 above should be interconnected to form the national or international sections as appropriate. These should then be checked for data transmission performance using limits that are consistent with the requirements of Recommendation M.134
43、0 5. A test duration of 24 hours is desirable; however, a shorter duration test, as described in 7.1, may be appropriate. 7.3 Setting up and testing procedures for an overall international data transmission link When the international and any national sections have been tested and found to be satisf
44、actory (see 7.2 above), they should then be interconnected to form the overall international data transmission link. It should be confirmed that test access arrangements are such that no part of the overall international data transmission link can be excluded from test. In accordance with Recommenda
45、tion M.1300 4, the LTPs at either end of an international data transmission link should provide a digital interface. Any equipment necessary to provide this interface is considered to be part of the link. The international data transmission link should be tested for 24 hours using limits derived in
46、accordance with Recommendation M.1340 5. However, a shorter duration test, as described in 7.1, may be appropriate. Where the 24-hour performance limits given in Recommendation M.1340 5 are not met, Network Operators/Service Providers should investigate the reasons for the test failure and endeavour
47、 to rectify any problems identified. Any possible effects of network traffic loading on data tests are for further study. Figure 1 illustrates the bringing-into-service tests and procedures. Recommendation M.1370 (06/98) 3 STD-ITU-T RECMN M-1370-ENGL 3998 4862593 Ob49770 955 9 - M X - i) Internation
48、al data transmission link Stage 1: Setting-up and lining-up of individual link sections (see 7.1) - LTP LTP M u- U X Stage 2: Setting up and testing of national and international link sections (see 7.2) International LTp linksection link section TIC National . : . : LTp LTP Uk X e.g. 56 kbiffs - Sta
49、ge 3: Setting-up and testing of an overall international data transmission link (see 7.3) LTP 7 M e.g. U x 56 kbiffs LTP i) International data transmission system Stage I: Local multiplexing equipment tests (see 8.2) Alarms Synchronization Stage 2: Muitiplexing equipment interworking tests (see 8.3) Stage 3: System test (see 8.4) Stage 4: System configuration tests (see 8.5) II Figure 1M.1370 - Bringing-into-service of an international data transmission system 4 Recommendation M.1370 (06/98) STD-ITU-T RECMN M.3370-ENGL 3778
