The 10/100/1000Base-T to 1000Base-LX/SX(mini-GBIC, SFP) Smart Media Converter (Part number: GST-805A) 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.
10/100/1000Base-T to Mini-GBIC Smart Gigabit Converter