The FIM-S222 is an optical fiber interface for use with Eclipse Digital Matrix and Matrix Plus3 intercom systems. Each pair of FIM-S222 fiber interfaces allow one or two digital matrix intercom panels or interface modules to be remotely connected to the matrix card frame via optical fiber.

This transmission capability allows a set of panels to be located remotely from the matrix frame using existing fiber cabling or can be used to temporarily locate panels via fiber in live event production applications. Panels may be connected to the matrix frame at fiber lengths of up to 12 miles (20 km) when used with single mode fiber. The use of fiber for long runs eliminates all types of electromagnetic and RF interference to the signal and provides an intrusion secure link.