The minimum number of errors that must be observed
within the number of events specified by usdFrDlcmiMonitoredEvents,
to declare the interface down.
'error' is lack of receipt of a Status, in response to an
issued Status Enquiry, within the Polling Interval (T391).
Pertains to DTE/NNI operation only. This parameter can
be reconfigured only when the Frame Relay interface
is acting as a DTE or NNI.