This attribute indicates the total number of Path Severely Errored
Seconds (PSES) that have been counted. A PSES is declared for
second intervals containing more than 22 (G.751 E3) or 34 (G.832
E3) Path Code Violations (PCV) or one or more Severely Errored
Frame (SEF) or Alarm Indication Signal (AIS) defects. Counting of
PSESs is inhibited when a Path Unavailable Second (PUAS) is
counted over the monitored second.