... 100BaseFX supports single-/multi-mode, SC/ST connector, optional.Ck-if11/21 adopt industry stard design, IP30 protection, rugged ... -M1*TP+1*fiber port,multi-mode,2Km,12~36VDC,SC/FCSTPcsCi-if21-M2*TP+1*fiber ... -S1*TP+1*fiber port,single-mode,20Km,12~36VDC,SC/FCSTPcsCi-if21-S2*TP+1*fiber ... port,single-mode,20Km,12~36VDC,SC/FCSTPcsTransmission distance and single fiber is ...