mscLpE3LineSevErroredSec 1.3.6.1.4.1.562.36.2.1.12.6.17.1.5

This attribute indicates the total number of Line Severely Errored Seconds (LSES) that have been counted. A LSES is declared for second intervals containing more than 34 Line Code Violations (LCV) or one or more Loss of Signal (LOS) defects.