This Counter32 measures, in cells, the combined total of CLP=0 and CLP=1 ATM cells received in the ingress direction of this channel before the traffic management entity processes them. It gives a single aggregate figure for total inbound cell volume on the connection, without breaking out priority level, useful as a quick top-line traffic indicator. An admin doing a fast health check on a PVC would read this alongside the discard counters below to compute an overall ingress loss rate.