This counts asynchronous, immediate, out-of-cycle LMI status frames the DCE side has transmitted, called Update STATUS under LMI Rev 1 or Asynchronous STATUS under ANSI Annex D and CCITT Annex A, sent whenever a PVC status changes rather than waiting for the next scheduled poll. An admin looks at this counter to confirm the network switch is proactively notifying the customer's DTE device of PVC changes in near-real time, which is what makes fast PVC-down detection possible on the customer side. For example, a spike in lportDCEOutAsyncStatusFrames right after an admin administratively shuts down a PVC confirms the DCE promptly pushed that change out rather than waiting for the DTE's next poll.