The 907-FOS card is a 2 x 1 fiber-optic switch available in a PC/104 form-factor. When combined with a Focal™ 907-SPLIT fiber-optic splitter, they create a redundant fiber-optic path for multiplexer systems and other optical data links.
The 907-FOS is a powered fiber-optics card typically installed at the console end of the fiber-optic link. It is controlled by either a manual onboard toggle switch or with a TTL compliant input signal. The 907-FOS will select one of the two fiber-optic paths or outputs and route all communications to a single fiber.