This attribute displays whether a Loss Of Signal (LOS) alarm state
has been entered. An LOS alarm state is entered when LOS defects
has been observed and accumulated for a period of 2.5 seconds +/-
0.5 seconds. An LOS defect is detected at the E3 line interface upon
observing N continuous pulse positions with no pulses of either
positive or negative polarity, where N is between 10 and 255. If the
LOS defects are intermittently occurring, the LOS defect
accumulator is decremented at a rate of 1/10 of the incrementing
rate (alarm integration ratio of 1/10), with all measurements based
on a 200 ms polling cycle.
The E3 component goes into an operational state of disabled until
the LOS alarm condition is cleared. The LOS alarm state is cleared
when the LOS defects are absent for a period of 10 seconds +/- 0.5
seconds.
The losAlarm attribute is always set to off when the component has
been locked and left offline.