The TP-Link SM311LM Multi-Mode SFP Module is a Gigabit fiber transceiver designed for short-range high-speed optical links in enterprise LANs, ISP access networks, and CCTV backhaul systems. Operating at an 850nm wavelength over 50/125μm or 62.5/125μm multi-mode fiber, it supports transmission distances of up to 550 meters with LC connector interfaces. Fully compliant with IEEE 802.3z standards, the SM311LM ensures reliable, low-latency performance and seamless compatibility with TP-Link JetStream and Omada switches as well as other standard SFP-enabled network devices.