mscVsFramerEchoReturnLoss 1.3.6.1.4.1.562.36.2.1.80.2.12.1.22

This attribute specifies the echo return loss parameter of the echo canceller. 0 db is the normal value for most line conditions. If the line quality is poor, in terms of echo, selecting a higher value may allow the echo canceller to perform better. A side effect is that the voice level is attenuated by the same amount, which may not always be acceptable. This attribute is not used if this VoiceService is running on a DS1V, E1V, 1pDS1V, 1pE1V, J2MV, 1pE1Mvp, 1pDS1Mvp, or 1pTTC2mMvp card.