This attribute displays whether an Alarm Indication Signal (AIS) alarm when state has been entered. An AIS alarm state is entered when AIS defects have been observed and accumulated for a period of 2.5 seconds +/- 0.5 seconds on the incoming E3 line. An AIS defect is the occurrence of the AIS (unframed signal with a density of zeros below a certain threshold such as defined by ITU Recommendation G.775). If the AIS defects are intermittently occurring, the 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 E3 component goes into an operational state of disabled until the AIS alarm condition is cleared (after AIS has been no longer detected for a period of 10 seconds +/- 0.5 seconds). As long as AIS is detected on the incoming line, the node also transmits the far-end SEF/AIS (in G.751 E3) or FERF (in G.832) defect indicator over the outgoing line. The txRai attribute is set to on when transmitting the far-end SEF/AIS defect indicator on the outgoing line. The rxAisAlarm attribute is always set to off when the component has been locked and left offline.