Table of Contents
1General
2Kindsofmeasurementsandtests
3Equipmentformakingtransmissionmeasurementsand
processingtheresults
3.1Absolutepowerlevelmeasurements
3.2Noisemeasurements
3.3Signal-to-total-distortionratiomeasurements
3.4Echocancellertestingsystem(ECTS)
3.5Digitalloop-backtests
3.6Adjustmentresults
3.7Recordingandpresentationofoutput
3.8Re-measurementandretestarrangements
4Methodofaccess
4.1Ingeneral,accessarrangementswillconformto
RecommendationM.560[3]
4.2Outgoinginternationalexchange
4.3Incominginternationalexchange
5Operatingprinciples
6Signallingsystemtestingandtransmissionmeasuring
procedurefdirectortoresponder
6.1Establishmentofconnectionandsignallingtest
sequence
6.2Busyflashtest
6.3Transmissionmeasuringprocedureandexchange
ofinformationbetweendirectingandresponding
equipment
6.4Descriptionoftransmissionmeasuringcycles
6.5End-of-programmeprocedure
6.6DescriptionofLayer2transmissionmeasuring
cycles
6.7Descriptionofechocancellertestingcycles
6.8Echocancellertesttiminganderror
considerations
6.9Responderdigitalloop-backtest
6.10Systemsupervision
7Descriptionofteststodigitalloop-backtestlines
7.1Analoguetestsonallcircuittypes
7.2Digitaltestsonwhollydigitalcircuits
8Programming
9Specificationsfortransmissionmeasuringapparatus
andfordisablingtonesandholdingtones
9.1Absolutepowerlevelmeasuringdevice
9.2Noiseandtotaldistortionmeasuringapparatus
9.3Disablingandholdingtones
9.4ECTSsendingapparatusofthedirectingand
respondingequipment
9.5ECTSreceivingapparatusofthedirectingand
respondingequipment
9.6ECTScommandsignalsexchangedbetweenthe
directingequipmentandtherespondingequipment
9.7Digitalpatterngeneratoranddetector
9.8Testpatterndetector
10Calibration
10.1Built-incalibration
10.2Self-check
11Optionalarrangements
11.1Automaticstart
11.2Timedautomaticselectionofparticularcircuits
orgroupsofcircuits
11.3Automaticrepeatattempt
11.4Switchingpadtest
11.5Interruptionandinstabilityduringlevel
measurements
11.6Non-availabilityofrespondingequipment
ANNEXASensitivityofthesignallingreceiver
References Abstract
Specifies the requirements for ATME No. 2 for automatic testing of transmission performance, echo cancellers, and signalling systems on international circuits terminating in exchanges with 4-wire switching.
