This object captures the value of the copied-frame counter from the sample just before the NotCopiedThreshold was reached, and resets when the new condition becomes active. An administrator uses it together with cntFddiMACBaseNotCopies to compute the exact receive-success ratio during the specific window that triggered the not-copied alarm. For example, comparing this baseline copied count against the total frames seen in that interval tells the admin how severe the buffer congestion actually was at the moment of the alert.