This attribute indicates whether a Received RAI alarm state is
entered. A received RAI alarm state is entered when the RAI signal
is detected on the incoming JT2 Line (when 16 or more consecutive
RAI patterns of 1111111100000000 are received on the 4 kbit/s
data channel (m-bits) within the framing bits of the JT2 frame). The
JT2 port goes into an operationalState of Disabled until the RAI
alarm condition is cleared. The RAI alarm is cleared when four or
more consecutive non-RAI patterns (anything other than
1111111100000000) are received.