The number of occasions when a RTT operation was not
completed before a timeout occurred, i.e.
rttMonCtrlAdminTimeout was exceeded.
Since the RTT operation was never completed, the
completion time of these operations are not accumulated,
nor do they increment rttMonStatsCaptureCompletions (in
any of the statistics distribution buckets).
This object has the special behavior as defined by the
ROLLOVER NOTE in the DESCRIPTION of the ciscoRttMonMIB
object.