ITU M.665:1988
ITU M.665:1988 Testing Of Echo Cancellers
Table of Contents
1Periodicityofroutinetests2Cancellerswhicharepermanentlyassociatedwith
internationalcircuits
2.1TestsusingtheEchoCancellerTestSystem(ECTS)
orAutomaticTransmissionMeasuringEquipment
2.2TestsusinganIn-Station-EchocancellerTester
(ISET)
3Cancellerspermanentlyassociatedwithnationalcircuits
4Testingofpooledcancellers
5Useofgroup-diagnostics
References