Cables Unlimited Smartronix Superlooper Gigabit Loopback Tester

The Gigabit Loopback Jack and Plug is designed to conveniently be available when needed. Quickly and easily checks the RX/TX pairs of 1000base network cables, helping to determine if a network signal exists or if there are broken or shorted wires within the cabling. The Gigabit Loopback Jack and Plug is backward compatible with 10base and 100base networks.