... dual fiberXTR1000B-L13-110M/100M/1000M TX, 1310nm, 20km, AC Supply Power, dual fiberXTR1000B-L13-210M/100M/ ... and Bi directionXTR1000B-LD-210M/100M/1000M, 1310nm, 20km, AC Supply Power, single fiber and Bi directionXTR1000-LD ... and Bi directionXTR1000-LD-210M/100M/1000M, 1310nm, 20km, DC Supply Power, single fiber and Bi direction ... port is auto-linking the Tx/Rx wires (e.g.either MDI-X or MDI-II). It ...