The 10/100BASE-TX to 100BASE-FX (SC, SM) Bridge Media Converter - 50km (Part number: FT-802S50) from Planet is a Media Converters. Media converter is a network device that converts communication protocols form one cable type to another type. This type of equipment is usually used in pairs to insert a fiber segment into copper networks.
10/100TX - 100Base-FX (SC) Single Bridge Mode Fiber Converter - 50KM, LFPT