The Cisco GLC-BX-20U is a bidirectional SFP transceiver supporting 1000BASE-BX for single-mode fiber up to 20 km. It transmits at 1310nm and receives at 1550nm using a simplex LC connector, enabling bidirectional data flow over a single fiber strand. Featuring hot-swappable capability and Digital Optical Monitoring (DOM), it ensures real-time performance tracking. Ideal for Gigabit Ethernet applications, it optimizes fiber usage and reduces infrastructure costs.
