1、TECHNICALSPECIFICATIONIEC TS 62367Pre-StandardFirst edition2004-01Safety aspects for xDSL signals on circuitsconnected to telecommunication networks(DSL:Digital Subscriber Line)Reference numberIEC/TS 62367:2004(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPL
2、IED BY BOOK SUPPLY BUREAU.Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edit
3、ion numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus
4、 ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress
5、undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(http:/www.iec.ch/searchpub/cur_fut.htm)enables you to
6、 search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just Published This summary of recently issued publications(http:/www
7、.iec.ch/online_news/justpub/jp_entry.htm)is also available by email.Please contact the CustomerService Centre(see below)for further information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:cust
8、serviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICALSPECIFICATIONIECTS 62367Pre-StandardFirst edition2004-01Safety aspects for xDSL signals on circuitsconnected to telecommunicatio
9、n networks(DSL:Digital Subscriber Line)PRICE CODE IEC 2004 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International El
10、ectrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chMFor price,see current catalogueCommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECO
11、N Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TS 62367 IEC:2004(E)CONTENTSFOREWORD.3INTRODUCTION.51Scope.62Normative references.63Terms,definitions and abbreviations.64xDSL signals on circuits connected to telecommunication networks.7Annex A(infor
12、mative)xDSL telecommunication systems.8A.1 Introduction.8A.2 General description.8A.3 Peak-to average ratio and CF.9A.4 CF distribution.10A.5 Line termination impedance.12A.6 Measurement of xDSL parameters.12Bibliography.13Figure A.1 Typical configuration of an xDSL system.8Figure A.2 Typical xDSL(V
13、DSL)signal in the time-domain.9Figure A.3 Probability of symbol with CF x.11Figure A.4 Inter-arrival time of symbol with CF x(DMT-symbol rate=4 kHz).11LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TS 62367 IEC:2004(E)3 INTERNATIONAL
14、ELECTROTECHNICAL COMMISSION_SAFETY ASPECTS FOR XDSL SIGNALS ON CIRCUITSCONNECTED TO TELECOMMUNICATION NETWORKS(DSL:DIGITAL SUBSCRIBER LINE)FOREWORD1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprisingall national electrotechnical committees(IE
15、C National Committees).The object of IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields.Tothis end and in addition to other activities,IEC publishes International Standards,Technical Specifications,Technical Reports,Publicl
16、y Available Specifications(PAS)and Guides(hereafter referred to as“IECPublication(s)”).Their preparation is entrusted to technical committees;any IEC National Committee interestedin the subject dealt with may participate in this preparatory work.International,governmental and non-governmental organizations liaising with the IEC also participate in this preparation.IEC collaborates closelywith the International Organization for Standardization(ISO)in accordance with conditions determined byagreem
