The GLC-BX-U is a Gigabit Ethernet SFP optical transceiver designed for high-performance, single-fiber bidirectional communication. It operates at a wavelength of 1310 nm (transmit) and 1490 nm (receive), enabling data transfer rates of up to 1.25 Gbps over single-mode fiber (SMF). Using an LC simplex connector, it supports link distances of up to 10 kilometers, making it ideal for enterprise access, metro, and service provider networks where efficient use of fiber infrastructure is required.