The Model 3012 10/100/1000Mbps Adaptive Gigabit Ethernet Fiber Converter uses switching technology to perform media conversion, which meets the standards of IEEE802.3, IEEE802.3u, IEEE802.3z, and IEEE802.3ab. This type of media converter supports two types of media network connections: 10Base-T/100Base-TX/1000Base-T and 1000Base-SX/LX. The Model 3012 can perform mutual conversion between 10Base-T/100Base-TX/1000Base-T twisted-pair electrical signals and 1000Base-SX/LX optical signals. This media converter extends the transmission distance of a 100m network over copper wires to 20km. This media converter supports transmission over single-phase, single-phase, and dual-fiber style fiber optic connections.