This variable represents the loopback state of
the CSU. Devices supporting read/write access
should return badValue in response to a requested
loopback state that the CSU does not support. The
values mean:
ds1NoLoop
Not in the loopback state. A device that is
not capable of performing a loopback on either
interface shall always return this as it's
value.
ds1LocalLoopbackLocalSide
Signal received from the local side of the
device is looped back at the local connector
(eg, without involving the CSU).
ds1LocalLoopbackRemoteSide
Signal received from the local side of the
device is looped back at the remote connector
(eg, through the CSU).
ds1RemoteLoopbackLocalSide
Signal received from the remote side of the
device is looped back at the local connector
(eg, through the CSU).
ds1RemoteLoopbackRemoteSide
Signal received from the remote side of the
device is looped back at the remote connector
(eg, without involving the CSU).