... , 10km, AC Supply Power, single fiber and Bi directionXTR1000B-LD-210M/100M/1000M, 1310nm, 20km, AC Supply Power, single fiber and Bi directionXTR1000-LD-110M/100M ... , 10km, DC Supply Power, single fiber and Bi directionXTR1000-LD-210M/100M/1000M, 1310nm, 20km, DC Supply Power, single fiber and Bi direction LED Description: LEDCOLORFUNCTIONFXGreenLit ...