The SFP100B3-SS20-I-DDM is an industrial-grade single-mode BiDi transceiver designed for long-distance communication over a single fiber strand. It supports 155 Mbps OC-3/STM-1 and 125 Mbps Fast Ethernet, with a transmission distance of up to 20 km using TX-1310 nm and RX-1550 nm wavelengths. The module features Digital Diagnostic Monitoring (DDM) for real-time performance insights and operates reliably in extreme temperatures ranging from -40 to 85°C. With a hot-pluggable LC connector and compliance with EN 60825-1 Class 1 laser standards, it is ideal for space-efficient and robust fiber deployments in harsh environments.