SFP Bidi 20km is a type of optical transceiver module that is used to transmit and receive data over a single fiber. It is designed to support data rates of up to 20km and is compliant with the Small Form-factor Pluggable (SFP) Multi-Source Agreement (MSA). This transceiver module is ideal for applications such as Gigabit Ethernet, Fibre Channel, and SONET/SDH. It features a hot-pluggable design, allowing for easy installation and maintenance. Additionally, it is designed to be energy-efficient, helping to reduce power consumption and operating costs. With its high performance and reliability, SFP Bidi 20km is an ideal solution for a variety of networking applications.