This variable represents the loopback configuration of
the DS1 interface. Agents supporting read/write access
should return badValue in response to a requested loopback
state that the interface does not support. The values mean:
xdsx1NoLoop
Not in the loopback state. A device that
is not capable of performing a loopback on
the interface shall always return this as
it's value.
xdsx1PayloadLoop
The received signal at this interface is
looped through the device. Typically the
received signal is looped back for re-
transmission after it has passed through
the device's framing function.
xdsx1LineLoop
The received signal at this interface does
not go through the device (minimum pene-
tration) but is looped back out.
xdsx1Framer
xdsx1Analog