Keep critical access links alive when copper distance becomes the constraint. Black Box LIC023A-R4 converts 10/100BASE-T to 100BASE-FX over multimode fiber, giving you a straightforward path to extend Ethernet across a 2 km span. The 1300 nm optical interface and SC connector align with established fiber deployments, making it a practical fit for campus edges, building interconnects, and equipment rooms where stable transport matters more than complexity. This converter is designed for teams that need a clean handoff between copper and fiber without replacing the surrounding network. It supports legacy 10/100 environments, helping you preserve existing switches, endpoints, and cabling investments while reaching farther than twisted pair allows. For infrastructure teams managing mixed media, it offers a focused way to maintain service continuity, reduce re-cabling, and keep remote devices on the network with minimal disruption.