ITU-T G 996 1-2001 Test Procedures for Digital Subscriber Line (DSL) Transceivers Series G Transmission Systems and Media Digital Systems and Networks Digital Sections and Digital )《.pdf
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1、COVERING NOTE GENERAL SECRETARIAT INTERNATIONAL TELECOMMUNICATION UNION Geneva, 3 1 January 2003 ITU -TELECOMMUNICATION STANDARDIZATION SECTOR Subject: Erratum 1 (01/2003) to ITU-T Recommendation G.996.1 (02/2001), Test procedures for digital subscriber line (DSL) transceivers Correction to Clause 7
2、.5 In the equation of clause 7.5 the sin term should be squared. The corrected equation is: X Union internationale des tlcommunications Place des Nations 121 1 GENVE 20 Suisse - Switzerland - Suiza INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.996.1 (0
3、2/2001) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system - Access networks Test procedures for digital subscriber line (DSL) transceivers ITU-T Recommendation G.996.1 (Formerly CCITT Recommendation) ITU-T G-SERIES RECOMMENDATIONS TRANSMI
4、SSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER- TRANSMISSION SYSTEMS INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES GENERAL CHARACTERISTICS OF INTER
5、NATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY TESTING EQUIPMENTS TRANSMISSION MEDIA CHARACTERISTICS DIGITAL TEWAL EQUIPMENTS DIGITAL NETWORKS DIGITAL SECTIONS AND DIGITAL LINE SYSTEM GfXl
6、eral Parameters for optical fibre cable systems Digital sections at hierarchical bit rates based on a bit rate of 2048 kbitk Digital line transmission systems on cable at non-hierarchical bit rates Digital line systems provided by FDM transmission bearers Digital line systems Digital section and dig
7、ital transmission systems for customer access to ISDN Optical fibre submarine cable systems Optical line systems for local and access networks G. 1 Offi. 199 G.20ffi.299 G.30ffi.399 G.40ffi.449 G.45ffi.499 G.50ffi.599 G.60ffi.699 G.70ffi.799 G.80ffi.899 G.90ffi.999 G.90ffi.909 G. 9 1 04.9 1 9 G.92ff
8、i.929 G.93 04.93 9 G.94ffi.949 G.95ffi.959 G.96ffi.969 G.97ffi.979 G.98ffi.989 Forjrther deaik, plme rejr to the list of ITU-TRecommendations. ITU-T Recommendation G.996.1 Test procedures for digital subscriber line SL) transceivers Summary This Recommendation describes the testing procedures for IT
9、U-T Digital Subscriber Line SL) Recommendations. The testing procedures described herein include methods for testing DSL transceivers in the presence of crosstalk fiom other services, Radio Frequency ingress, impulse noise and POTS signalling. Test loops and in-home wiring models are specified for d
10、ifferent regions of the world for use during DSL performance testing. Other DSL Recommendations reference this Recommendation for testing procedures and configurations. This Recommendation does not specie performance requirements for these other Recommendations; it only specifies the procedures for
11、measuring the performance requirements for a particular Recommendation. Source ITU-T Recommendation G.996.1 was revised by ITU-T Study Group 15 (2001-2004) and approved under the WTSA Resolution 1 procedure on 9 February 2001. ITU-T G.996.1(02/2001) 1 FOREWORD The International Telecommunication Uni
12、on (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 tam questions and issuing Recommendations on them with a view to stan
13、dardizing 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 Recommendations is c
14、overed 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 IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to in
15、dicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL, PROPERTY RIGHTS IT 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 position concern
16、ing 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 received notice of intellectual property, protected by patents,
17、 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. o ITU 2002 All rights reserved. No part of this publication may be reproduced or utilize
18、d in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing fkom ITU. ii ITU-T 6.996.1 (02/2001) CONTENTS Page 1 Scope 1 2 References . 3 Definit ions 4 Abbreviations 5 5.1 Test procedures and laboratory setup . DSL operation with spli
19、tters 5.1.1 Laboratory setup . 5.1.2 Crosstalk and RFI test . 5.1.3 Impulse noise test . 5.1.4 POTS interference test DSL operation without a splitter at the ATU-R 5.2.1 Laboratory setup . 5.2.2 Crosstalk and RFI test . 5.2.3 Impulse noise test . 5.2.4 POTS interference test 5.2 5.3 POTS QoS testing
20、 . 5.3.1 Telephone circuitry . 5.3.2 Test conditions . 5.3.3 Summary of test procedure . 6 Test loops.,. . 6.1 Local loop configurations European local test loops Test loops in an environment coexisting with TCM-ISDN DSL 6.1.1 6.1.2 6.1.3 North American test loops 6.2 In-home wlrmg models In-home wi
21、ring model #1 In-home wiring model #2: Daisy Chain 4-conductor, 24 AWG. non- paired station wire In-home wiring model #3: Star - 152.4 m (500 fi), 4-pair Category 3 wire . In-home wiring model for TCM-ISDN DSL environment . 6.2.1 6.2.2 6.2.3 6.2.4 7 7.1 7.2 7.3 Power spectral density of crosstalk di
22、sturbers Simulated DSL PSD and induced NEXT . Simulated HDSL PSD and induced NEXT Simulated Ti line PSD and induced NEXT 1 2 3 3 5 8 8 9 9 11 11 11 12 12 13 14 14 14 14 17 23 31 31 32 33 34 36 36 37 38 ITU-T G.996.1(02/2001) iii 7.4 7.5 7.6 7.7 7.8 7.9 8 9 9.1 9.2 9.3 Simulated G.992.1 downstream PS
23、D and induced NEXT and FEXT . 7.4.1 FEXT . 7.4.2 NEXT . Simulated G.992.1 upstream PSD and induced NEXT and FEXT 7.5.1 FEXT . 7.5.2 NEXT . Simulated G.992.2 downstream NEXT and FEXT . 7.6.1 FEXT . 7.6.2 NEXT . Simulated G.992.2 upstream NEXT and FEXT . 7.7.1 FEXT . 7.7.2 NEXT . ETSI A, ETSI B and Eu
24、ro-K crosstalk . Power spectral density of crosstalk disturbers in an environment coexisting with 7.9.1 Crosstalk disturber type 7.9.2 Crosstalk test parameters 7.9.3 Simulated TCM-ISDN DSL PSD and induced NEXT and FEXT 7.9.4 Simulated HDSL PSD and induced NEXT . 7.9.5 Simulated ADSL downstream PSD
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