The Fiberlink XA/RA-1900A and XR-1900 fiber optic systems transmit IRIG and similar NASA and NBS standard instrumentation time-code formats over standard multimode or single mode fiber at 850 nm or 1310 nm. Combinations of four different units may be configured to provide point-to-point, point-to-multipoint or drop-and-repeat signal distribution. Ideal for the Military and Aerospace Industries.