mscVsFramerEchoTailDelay 1.3.6.1.4.1.562.36.2.1.80.2.12.1.21

This attribute specifies the maximum echo canceller tail delay coverage. It should be selected higher than the summation of the round trip delay of echo and hybrid response time. A 32 msec setting is good for a radius of 2700 km, assuming that the signal is going through 4 exchanges and the hybrid response time is 6 msec. A 64 msec setting offers even greater coverage (more distance or more switches), with comparable convergence time. The recommended setting is 64 msec. This attribute is not used if this VoiceService is running on a DS1V, E1V, 1pDS1V, 1pE1V, J2MV, 1pE1Mvp, 1pDS1Mvp, or 1pTTC2mMvp cards.