... interface (TX) and 100M optical fiber interface (FX). 2.Auto negotiation function allows UTP port to auto ... Duplex: bake pressure flow control5.LED Light: PWR, FX Link/Act, TP1 FDX,TP1 Link/Act, TP2 ... ModelProduct descriptionSF03M10/100M Ethernet Dual Fiber Switch with 2 UTP ports and 1 multimode fiber port, ... 100km.SF03SS10/100M Ethernet Single Fiber Switch with 2 UTP ports and 1 singlemode fiber port, ...