This read-write integer sets the Cell Delay Variation Tolerance used by UPC to determine how much cell-arrival jitter is tolerated before cells are considered non-conforming, applying to all cells on the connection. Admins tune this to accommodate normal jitter introduced by multiplexing and network transit without triggering false policing violations. For example, setting ingrUpcCCDV too tight for a connection traversing several multiplexing points could cause legitimate, slightly jittered traffic to be incorrectly flagged as non-conforming.