This is the upper 32 bits of the 64-bit count of ingress cells on this channel that carried the EOF=1 marker and were discarded specifically at the traffic management entity, rather than earlier in the pipeline. Reading it together with the low-order cwacsIngEOF1Discard (or the combined cwacsHCIngEOF1Discard) lets an operator see, on a high-volume channel, how many frame-ending cells the traffic-management/shaping function itself is dropping, which points to shaping or policing as the cause of incomplete AAL5 frames rather than upstream congestion. If end systems report truncated frames on a given PVC, an admin would check whether this counter is incrementing to see if the traffic management stage is discarding the frame-terminating cells.