The 1000BASE-BX-D 80km TX1550nm/RX1490nm Simplex LC/UPC BiDi SFP Optical Transceiver Module is a high-performance, hot-pluggable SFP transceiver designed for long-distance Gigabit Ethernet single-fiber bidirectional communication. It transmits data at 1550 nm and receives at 1490 nm, enabling full-duplex transmission over a single strand of singlemode fiber (SMF) for distances up to 80 kilometers.