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.