This read-only Integer32 (0..2147483647) reports the Cell Delay Variation Tolerance negotiated for this call in the forward direction, applying to policing of both its PCR and SCR. An administrator checks this to know how much jitter this specific call's forward traffic is allowed before cells are considered non-conforming, distinct from the interface-wide cwspDefaultCdvt settings used only when nothing is negotiated. For example, comparing cwspCallFwdCdvt across two calls of the same service category explains why one tolerates more timing jitter than the other during policing.