SZOPT’s MPO/ MTP loopback is a device widely used for parallel connection tests and an aging test of optical communication equipment. Our MPO/MTP loopback adapter can transmit the optical network signal from the transmitter to the receiver, thereby forming the optical signal receiving and transmitting loop. MPO/MTP loopback provides a fast and efficient way to test the transmission capacity and receiving sensitivity of optical network equipment. The MPO/MTP loopback has 8F, 12F, 16F, 24F, 32F channels with low loss, singlemode and multimode(OM1/OM2/OM3/OM4/OM5) options.