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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.
optical loopback patch cords
