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ITU E.261:1988

ITU E.261:1988 Devices For Measuring And Recording Call Durations

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Table of Contents

1Useofapparatusofthetypewhichmeters
thequantityofelectricity(ampere-hourmeter
orcoulomb-meter)
2Useofpulse-countingmeters
3Useofadeviceforperiodicallyscanning
circuitsorequipment
4Degreeofaccuracyofmethods2and3
5Faultindication
6Equipmentdesign
ANNEXA-Measuringcallduration

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