Allied Telesis AT-MC1004 unmanaged Gigabit media converter is designed to extend the distance of your network by interconnecting LAN devices that are physically separated by large distances.For the Allied Telesis AT-MC1004, the fiber optic port has a fixed multi-mode fiber 1000SX (SC) connector and a maximum operating distance of 550m.The link test is a fast and easy way for you to test the connections between the media converter ports and the endnodes that are connected to the ports. If a network problem occurs, you can perform a link test to determine which port is experiencing a problem.Copper-to-fiber Gigabit Ethernet media converters present a simple and very cost-effective way of connecting Gigabit Ethernet LANs over extended distances.