This variable represents the current state of the
loopback on the DS1 interface. It contains
information about loopbacks established by a
manager and remotely from the far end.
The acDs1ConfigLoopbackStatus is a bit map represented as
a sum, therefore is can represent multiple
loopbacks simultaneously.
The various bit positions are:
1 acDs1NoLoopback
2 acDs1NearEndPayloadLoopback
4 acDs1NearEndLineLoopback
8 acDs1NearEndOtherLoopback
16 acDs1NearEndInwardLoopback
32 acDs1FarEndPayloadLoopback
64 acDs1FarEndLineLoopback