Loopback detection and cable diagnostic - Report comes back to users quickly once the connection has failed. - Fast diagnostic speed minimizes lost time for business. Loopback detection and cable diagnostic – Fast repair speed minimizes the lost of the business Loopback detection and cable diagnostic monitor the connection status, report back to users in a quick response speed once the connection is failed, and allow users to notice and fix the problems immediately. The lost and damage to business operation caused by network disconnection is minimized.