... : 100BaseFX ports (SC/ST connector, optional)Single-mode: 20, 40,60, 80, 120Km,optionalMulti-mode: 2,5Km,optionalWavelength: 850nm, 1310 nm ... ,12~36VDC,SC/FCSTPcsTransmission distance and single fiber is optinal optical fiber converter/repeater network switch ck-if11-m