Reference:
FST-802S50
PLANET™ FST-80x Smart Media Converter series provides media conversion between 10/100BASE-TX and 100BASE-FX interfaces, such as multi-mode ST/SC connectors (2km), single-mode SC connector (15/35/50km) and single fiber connector using the wavelength-division multiplexing (WDM) technology (20/60km) to enable to extend links over long distances using fiber optic cable.