This attribute displays whether an Alarm Indication Signal (AIS) alarm state has been entered. An AIS alarm state is entered when AIS defects have been observed and accumulated for 2.5 seconds +/ - 0.5 seconds. An AIS defect is the occurrence of AIS (valid DS3 frame with payload containing the 1010...sequence and with C-Bits set to zero) in contiguous M-frames for a time greater than 100 milliseconds. 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 DS3 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, the node also transmits the far-end SEF/AIS defect indicator over the outgoing line. When not running in C-Bit Parity mode, the txRai attribute is also 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.