LevelOne RJ45 to ST Gigabit Media Converter, Single-Mode Fiber, 1310nm, 20km, 1000 Mbit/s, 1000Base-LX, 1000Base-SX, IEEE 802.3, IEEE 802.3ab, IEEE 802.3u, IEEE 802.3z, Fast Ethernet, Gigabit Ethernet, 10,100,1000 Mbit/s, 10BASE-T, 100BASE-TX, 1000BASE-T