Move Gigabit traffic between multimode and single-mode fiber without redesigning the backbone. The ADDON ADD-GMC-MMSM-2SC converts 1000BASE-SX on SC to 1000BASE-LX on SC, giving network teams a direct way to bridge short-reach MMF segments to longer-reach SMF infrastructure. This converter is built for environments where fiber type, wavelength, and distance must be matched deliberately. The 850 nm side supports multimode deployments up to 550 m, while the 1310 nm side supports single-mode runs up to 20 km. That makes it a practical fit for campus links, building interconnects, and staged fiber migrations where you need to preserve Gigabit Ethernet performance across different optical plants. The SC interface keeps the connection model familiar for structured fiber environments, and the converter’s focused role avoids the overhead of a larger switching platform. For procurement teams, that means a targeted solution for a specific transport problem: maintain link continuity, match the right optical medium, and extend reach without overbuying hardware.