This small form-factor pluggable (SFP) transceiver provides hot-swappable Gigabit or Fast Ethernet connectivity for Lantronix and compatible switches. Variants cover duplex fiber over multimode or single-mode (LC), bidirectional single-fiber BiDi modules with split TX/RX wavelengths, and 1000Base-T copper over RJ45. Reach codes in the part number indicate distance (e.g. 2K=2km, 10K=10km, 40K=40km); choose the module matching your fiber type, distance, and port.