mscVRouteInterfaceEchoReturnLoss
1.3.6.1.4.1.562.36.2.1.116.3.10.1.11
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 on DS1V, E1V, 1pDS1V,
1pE1V, J2MV, 1pE1Mvp, 1pDS1Mvp, or 1pTTC2mMvp card.