This read-only Counter64 is the frame-level counterpart of the Dropped-bytes counter — frames received on this PM instance that were discarded. Dividing this by the accepted-frames counter on the same instance gives the frame loss ratio for that flow point, which is what actually predicts retransmissions or visible quality drops for whatever traffic rides it; because it is drawn from this instance's running statistics bin, it behaves like a long-running total rather than a rotating window, so admins baseline against it instead of expecting it to reset daily. On EVC 105 (E-Line, 100 Mbps CIR/1 Gbps EIR), this might read 199,000 frames over the current statistics window, which an admin would cross-check against the matching byte counter to see if average frame size looks normal for that service.