This object sets the frequency, in seconds, at which end-to-end F5 OAM loopback cells are transmitted while a change in the PVC's up or down state is being verified, and it only applies when OAM management is enabled. An administrator tunes this interval to control how quickly the retry-up or retry-down counts can be satisfied during a state transition. For example, a short retry interval combined with a low retry-up count would let the channel confirm a PVC has come back up only a few seconds after connectivity is restored.