... No.Descriptionunitif11-M1*TP+1*fiber port,multi-mode,2Km,12~36VDC,SC/FCSTPcsCi-if21-M2*TP+1*fiber port,multi-mode,2Km ... ,12~36VDC,SC/FCSTPcsCk-if11-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 optinal optical fiber converter/repeater network switch ...