The STARTECH ET91000SM20 is a Gigabit Ethernet copper-to-fiber media converter designed for IT infrastructure applications. This device facilitates the extension of a Gigabit Ethernet network connection over single-mode (SM) fiber optic cable, converting electrical signals from a copper Ethernet cable to optical signals for fiber transmission, and vice-versa. It supports LC connectors for fiber optic termination and can extend network segments up to 20 kilometers. It addresses challenges related to electromagnetic interference over long runs and provides a reliable solution for extending network reach in campus environments or between buildings.