This read-only PerfTotalCount reports the count of receive frames discarded because they exceeded the maximum allowed size, scoped to the running total for the current calendar day so far. Operationally, oversized frames being dropped can point to a misbehaving device upstream sending non-conforming frames onto the DSL link. For example, an admin monitoring today's running oversized-frame total can catch a misbehaving device early in the day rather than waiting for tomorrow's yesterday-total to reveal it.