A read-only Counter32 counting the number of times this subscriber unit attempted to synchronize with the head end but failed. A rising failure count without a corresponding rise in successes would indicate the unit is struggling more and more to reacquire the link, a clear sign of worsening RF conditions or hardware trouble. For example, a subscriber unit whose p2mpSuSyncFailureCount spikes sharply overnight, without a corresponding weather event on record, might point to a developing hardware fault rather than an environmental cause.