MPO loopback is a small device used to test or diagnose the network, especially for parallel optics 40/100G networks.

MPO Loopback link Transmitter (TX) and Receivers (RX) positions of MPO transceivers interfaces, looping the signal from the transmitter to Receivers of a device. It provides an efficent way to test the transmitting and receiving functions of the device.

The MPO Loopback Options Include:

1. 8, 12 and 24 fibers
2. OM3, OM4, Singlemode
3. Straight, Crossed
4. With or without PIN