ITU P.310:2003
ITU P.310:2003 Transmission Characteristics For Telephone Band (300-3400 Hz) Digital Telephones Provides audio performance requirements and associated testing methods for telephone band (300-3400 Hz) digital telephones.
Table of Contents
1Scope2References
3Definitionsandabbreviations
3.1Definitions
3.2Abbreviations
4SendingLoudnessRating(SLR)andreceivingLoudnessRatings
(RLR)
5SidetoneMaskingRating(STMR)andListenerSidetoneRating
(LSTR)
6Sendingandreceivingfrequencyresponses
7Noisecharacteristicsatsendingandreceiving
8Distortioncharacteristicsatsendingandreceiving
8.1Method1(Noisemethod)
8.2Method2(Sinewavemethod)
9Out-of-bandsignals
9.1Sending
9.2Receiving
10WeightedTerminalCouplingLoss(TCLw)
11Stabilityloss
12Delay
13Inputversusoutput(amplitude)characteristics
AnnexA-Variationofgainwithinputlevel
A.1Sendingdirection
A.2Receivingdirection
AnnexB-Objectivemeasurementmethodsfortesting
B.1Introduction
B.2Approachesfortestingdigitaltelephones
B.3Definitionof0dBreferencepoint
B.4Definitionofinterfaces
B.5Codecspecification
B.6Measurementofdigitaltelephonetransmission
characteristics
AnnexC-Distortionallowances
AnnexD-Testequipmentrequirements
D.1Electro-acousticequipment
D.2Testsignals
D.3Accuracyoftestequipment
AppendixI-Bibliography