This attribute indicates the number of seconds when the near-end
PLCP layer is unavailable. The PLCP Path Layer becomes
unavailable at the declaration of PLCP LOF (Loss of Frame) failure
alarm state. The PLCP Path Layer becomes available again only
after clearing this condition.
For second intervals where PLCP UAS are counted, counting of
PLCP Severely Errored Framing Seconds (SEFS), PLCP Coding
Violations (CV), PLCP Errored Seconds (ES), PLCP Severely
Errored Seconds (SES) and PLCP Far-End Severely Errored
Seconds (FESES) is inhibited.