ITU M.580:1988
ITU M.580:1988 Setting Up And Lining Up An International Circuit For Public Telephony
Table of Contents
1Introduction2Organization
3Limitsfortheoveralllossofacircuitandcircuit
sections
3.1Limitsforoveralllossat1020Hz
3.2Limitsfortheoverallloss/frequency
characteristic
4Settingupandliningupanalogueandmixedcircuit
sections
5Settingupandliningupmixedanalogue/digitaland
digitalterminalcircuitsections
6Settingupandtestingdigitalcircuitsections
7Settingupandliningupaninternationalcircuit
7.1Settingupthecircuit
7.2Liningupthecircuit
8Measurementofcircuitnoise
9Measurementoftotaldistortion
9.1General
9.2Measurementoftotaldistortionusingatest
signallevelof-10dBm0
9.3Measurementoftotaldistortionusingatest
signallevelof-25dBm0
10Measurementsofotherparameters
11Checkofsignallinglevel
12Functionaltests
13Exchangeofinformationonechocancellertest
capability
14Recordsofresults
15Settingupandliningupaninternationalcircuit
usingATME
15.1Settingupthecircuit
15.2Liningupthecircuitdigitalterminalsections
15.3Othertests
15.4Recordingofresults
ANNEXA-Methodsproposedforsettingupandliningup
ofmixedanalogue/digitalterminalsections
A.1Checkofthemixedanalogue/digitalterminal
equipment
A.2Measurementandadjustmentoflevels
A.3Othermeasurements
A.4Mixedanalogue/digitalsectionsatterminal
exchanges
References