The levelOne SFP-2503 is a high performance and cost-effective single-mode SFP transceiver. Intended for use with Gigabit Ethernet, it provides up to 2.5 Gbps bidirectional data transfer rate on a single duplex fiber core. For use with 9 and 125 micron fiber cables, it can reach a distance of up to 20km. The SFP-2503 transceiver operates using a wavelength of 1310nm with a DFB Laser Diode light source and has an LC port.