Article DEM-331R / 20KM / B2AManufacturer D-LinkStandards and protocols IEEE-802.3z, 1000BASE-BXForm factor of the SFP moduleNumber of fibers Single-modeOptical connector type LCThe working distance of the module is 20 km.Data transfer rate 1 Gbit / sData transfer rate is 1.25 Gbit / sReceiver sensi..