This variable represents the desired loopback configuration of the DS1 interface. Agents supporting read/write access should return inconsistentValue in response to a requested loopback state that the interface does not support. The values mean:

dsx1NoLoop not in the loopback state. A device that is not capable of performing a loopback on the interface shall always return this as its value.

dsx1PayloadLoop

the received signal at this interface is looped through the device. Typically, the received signal is looped back for retransmission after it has passed through the device's framing function.

dsx1LineLoop the received signal at this interface does not go through the device (minimum penetration) but is looped back out.

dsx1OtherLoop loopbacks that are not defined here.

dsx1InwardLoop the transmitted signal at this interface is looped back and received by the same interface. What is transmitted onto the line is product dependent.

dsx1DualLoop both dsx1LineLoop and dsx1InwardLoop will be active simultaneously.