Loopback patchcord provides a media of return path for a signal, whether the signal is for testing purposes or due to network restoration. In the case of testing, the loopback signal is used for diagnosing a problem. Sending a loopback test to a network equipment, one at a time, is a technique for isolating a problem. Its performance is as good as that of a general patchcord. Available type includes Escon, MTRJ, SC, FDDI and LC.It features on:1.Compact design; 2.Compatible with Fast Ethernet, Fiber Channel, ATM and Gigabit Ethernet ;3.Short wavelength devices ; 4.Custom assemblies available.And popular for: 1.Equipment interconnection ;2.Device pig-tailing ;3.Premise networks ;4.Patch panel applications ;5.Communications connections ;6.Loopback for network components testing.