... 125um single-modeModel DescriptionThe 1000Mbps fiber Transceivers:TypeDescriptionXTR1000B-S8510M/100M/1000M TX, 850nm, 550m, AC Supply Power, dual fiberXTR1000B ... Power, single fiber and Bi directionXTR1000B-LD-210M/100M/1000M, 1310nm, 20km, AC Supply Power, single fiber and ... TP half-duplex mode is active; Blinks when collision signal is presentPWRGreenLit when power is coming up1. Installing the ...