This read-write object enables or disables detection of inbound line loopback codes, noting that in the current release this detection is only implemented in HSSI DCE mode, and defaulting to disabled. An administrator enables it when the device needs to automatically respond to loopback codes sent by remote test equipment. For example, a technician planning to run a remote loopback test toward an HSSI DCE port would first confirm this detection setting is enabled so the device will honor the incoming loop code.