This attribute indicates the total number of Far-End Errored
Seconds (FEES). A FEES is declared for second intervals
containing with one or more FECVs or one or more far-end SEF/
AIS defects. A far-end SEF/AIS defect occurs when the X-Bits of
the DS3 frame are received as being set to zero. For second
intervals where Far-End Unavailable Seconds (FEUAS) are
counted, counting of FEESs is inhibited.