Current Loop status of T1 CSU/DSU. Represented as a sum of
a bit map. The variable bit positions are:
1 - lossofSignal (LOS); unable to detect the DS1 signal.
2 - lossofFrame (LOF); unable to synchronize on the DS1
signal.
4 - detectedRemoteAlarmIndication (RAI); indicates that the
transmitting equipment has lost its incoming signal.
RAI is commonly called yellow alarm.
8 - detectedAlarmIndicationSignal (AIS); indicates that there
is a transmission interruption located either at the
equipment originating the AIS signal or upstream of
that equipment. Indicated by an unframed, all-'ones'
signal. Also known as blue alarm.
16 - placedInLoopback; Line placed in loopback from remote.