ITU-T G.991.2 Erratum 1 (04 2005)(英)Single-pair hi

UnioninternationaledestelecommunicationsPlacedesNations1211GENEVE20Suisse–Switzerland–SuizaCOVERINGNOTEGENERALSECRETARIATINTERNATIONALTELECOMMUNICATIONUNIONGeneva,14April2005ITU–TELECOMMUNICATIONSTANDARDIZATIONSECTORSubject:Erratum1(04/2005)toITU-TRecommendationG.991.2(12/2003),Single-pairhigh-speeddigitalsubscriberline(SHDSL)transceivers1)Inclause9.5.3,secondparagraph,changeTablereferencefrom9-12to9-2asfollows:Table9-12isanexampleof....2)InA.3.1.4,replacetheequationbythefollowingone:()()()()()()()()()()()()++++−−−++−−−+=∑=ksymksymksymksymksymksymkkkksymksymksymMkdBffNffHffSffNffHffSfNfHfSffNffHffSMSNR22221012221log1013)InFigureA.12,inSTU-Rbox,addunitΩ(ohm)tothetwovalues25.4)InclauseF.4,NominalPSD(f)equation(afterFigureF.1),theindicatedvalue(–100dBm/Hz)for3.184MHz≤f≤12MHzshouldread(–110dBm/Hz).