MT loopback patch cord mainly used for optical fiber communication networks. It tests and evaluates the single device, interfaces, and the optical communication lines. This patch cord can test and evaluate multiple channels simultaneously. It effectively saves the space and test costs. Depending on the application occasions, MT loopback patch cord can be divided into 6,8,12 and 24 channels. It used mini-breakout PVC/LSZH cable and high-precision MT connector, can fully guaranteed the inspection and testing process stability and accuracy.