1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 0.151 Corrigendum 1 (05/2002) SERIES O: SPECIFICATIONS OF MEASURING EQUIPMENT Equipment for the measurement of digital and analogue/digital parameters Error performance measuring equipment operating at the pr
2、imary rate and above Corrigendum 1 ITU-T Recommendation 0.151 (1992) - Corrigendum 1 ITU-T O-SERIES RECOMMENDATIONS SPECIFICATIONS OF MEASURING EQUIPMENT General Maintenance access Automatic and semi-automatic measuring systems o. 14.9 o. 104.19 0.204.39 -. Equipment for the measurement of analogue
3、parameters 0.404.129 surement of digital a Forjkrther details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation 0.151 Error performance measuring equipment operating at the primary rate and above Corrigendum 1 Source Corrigendum 1 to IT-T Recommendation 0.151 was prepared by I
4、TU-T Study Group 4 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 May 2002. ITU-T Rec. 0.151 (1992)/Cor.l(05/2002) 1 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication S
5、tandardization 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 with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA)
6、, 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 covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall wit
7、hin ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and LEC. 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
8、 ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. IT takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU me
9、mbers 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, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may
10、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, by any means whatsoever, without the prior written permission of ITU. ii ITU-T Rec. 0.151 (1992)/Cor.l(05/2002) CON
11、TENTS 1 Introduction 2 Resolved defect . Page 1 1 ITU-T Rec . 0.151 (1992)/Cor.l(05/2002) iii ITU-T Recommendation 0.151 Error performance measuring equipment operating at the primary rate and above Corrigendum 1 1 Introduction The secondparagraph of 2.3D.151 (1 0/92) contains the following text: Th
12、e pattern may be generated in a twenty-stage shift register whose 17th and 20th stage outputs are added in a modulo-two addition stage, and the result is fed back to the input of the first stage. An output bit is forced to be a ONE whenever the previous 14 bits are all ZERO. The last sentence asks t
13、o insert a ONE whenever the lprevious“ 14 bits are all ZERO. This dejnition is inconsistent with the corresponding correct dejnition in 5.5/0. 150 (05/96). 2 Resolved defect Replace the last sentence of the secondparagraph of 2.3/0.151 with the following text: An output bit is forced to be ONE whene
14、ver the next 14 bits are all ZERO. ITU -T 0.151 (1992)/Cor.l(05/2002) 1 SERIES OF ITU-T RECOMMENDATIONS 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
15、V Series X Series Y Series Z Organization of the work of ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication se
16、rvices Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Cable networks and transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protec
17、tion of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Tele
18、phone transmission quality, telephone installations, local line networks Switching and signalling 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 infrastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 2002
