This sets the Cell Delay Variation Tolerance for this virtual connection, the amount of jitter the switch's policing function will tolerate before treating cells as non-conforming to the circuit's traffic contract, effectively adding slack to the PCR/SCR enforcement to account for normal cell-clumping. An admin provisioning a circuit over a path known to introduce some jitter, multiple switching hops or shared trunks, would set a more generous cktAtmCDVT to avoid the policing function falsely flagging legitimately-conforming traffic just because cells arrived slightly bunched up. For example, raising cktAtmCDVT on a circuit that traverses many hops reduces false UPC violations caused by cumulative jitter, at the cost of being slightly more lenient toward genuinely non-conforming traffic.