Current loop status or alarm condition. Represented as a sum
of a bit map. The variable bit positions are:
1 oosOofFromNetwork - The DSU is receiving Out of Service/
Out of Frame code from network indicating network
trouble. This can be a problem with a device at the
remote DSU. The most common cause of the this error
is either the remote DSU is powered off or the remote
telco connection is open.
2 noReceiveSignal - The DSU has detected sealing current from
the central office but the receive level is below
-45db.
4 noSealingCurrent - the DSU does not detect sealing current
on the loop interface. This is normal for a private
network.
8 noFrameSync - At 64k data rate the local loop operates at
72k with a framing pattern added to maintain byte
alignment with the network. This condition is reported
if the DSU cannot find the framing pattern.
16 attemptingToRateAdap - Set in 'autorate' mode when the DSU
is searching for the loop rate.
32 rtTestFromTelco - Set when the DSU in telco initiated RT
test.
64 llTestFromTelco - Set when the DSU in telco initiated LL
test or when the transmit and receive pairs are
reversed.
128 rdlFromRemoteDSU - Set when remote digital loopback
initiated from remote DSU.