This read-only counter tallies the number of cells transmitted from this channel onto the internal cellbus after ingress policing and queueing have been applied, representing the traffic that actually made it through the ingress processing pipeline. Admins compare this against chanIngrRcvCells to determine how much traffic was lost or discarded during ingress processing on this channel. For example, if chanIngrXmtCells grows noticeably slower than chanIngrRcvCells, the difference reflects cells being discarded by UPC policing or queue-full conditions along the way.