The object specifies the worst case Echo Return Loss for
which the echo canceller must operate. To some echo
cancellers this object may not apply. This object is
valid if the cvIfCfgEchoCancelEnable object is 'true'.
echoCancellerWorstERL6dB - 6 decibels worst case ERL.
echoCancellerWorstERL3dB - 3 decibels worst case ERL.
echoCancellerWorstERL0dB - 0 decibels worst case ERL.
echoCancellerWorstERLUnknown - the object does not apply
to this echo canceller.
The default value of this object is
echoCancellerWorstERL6dB unless
echoCancellerWorstERLUnknown is appropriate because
the echo canceller is not configurable by this object.