... multi-mode 8.3/125,8.7/125,9/125 or 10/125um single-modeModel DescriptionThe 1000Mbps fiber Transceivers:TypeDescriptionXTR1000B-S8510M/100M/1000M ... dual fiberXTR1000B-L13-310M/100M/1000M TX, 1310nm, 60km, AC Supply Power, dual fiberXTR1000B-L15-110M/100M/1000M TX, 1550nm, 60km, AC Supply Power, dual fiberXTR1000B ... the proper wiring and the Link LED status. 1000M Dual Fiber SFP fiber Media Converter