This attribute displays whether a Line Alarm Indication Signal (L- AIS) alarm state has been entered. An L-AIS alarm state is entered when L-AIS defects have been observed and accumulated for a period of 2.5 seconds +/- 0.5 seconds. The L-AIS defect is the occurrence of the L-AIS signal in five contiguous STS (STM) frames (111 pattern in bits 6,7, and 8 of the K2 bytes). If the L-AIS defects are intermittently occurring, the L-AIS 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 Sonet/Sdh component goes into an operational state of disabled until the L-AIS alarm condition is cleared. The condition is cleared after not detecting the L-AIS signal for a period of 10 seconds +/- 0.5 seconds. The rxAisAlarm attribute is always set to off when the component has been locked and left offline.