An MPO switch device that includes a first input/output port and a second input/output port, a MPO port, a plurality of switches disposed between the first input/output port and the second input/output port, and a switch control for controlling the position of each of the switches to direct light through a desired return path. The plurality of switches are arranged and connected together by non-blocking connections that allow simultaneous testing of all common 1 GB, 10 GB, and 40 GB transmit and receive fiber pair paths.