This read-only counter, in frames, tallies frames that were to be transmitted but were discarded, for reasons the description names as policing or lack of buffers. Because one of its two stated causes is buffer exhaustion rather than policing, a spike here alongside healthy inbound counters can indicate the switch itself is momentarily overloaded on this connection's egress path rather than the customer exceeding any contract. This counter rising during a period when this VC's own traffic descriptor limits weren't being approached suggests transient buffer pressure on the switch rather than non-conformant customer traffic.