Indicates the current state of the port.
lockedOut
This bit, when applied to a working channel, indicates
that the channel is prevented from switching to the
protection line. When applied to the null channel, this
bit indicates that no working channel may switch to the
protection line.
sd
A signal degrade condition is in effect.
sf
A signal failure condition is in effect.
switched
The switched bit is applied to a working channel if that
channel is currently switched to the protection line.