SSA2 series boards are developed based on STN6200 platform. They are mainly used in front-end optical splitter amplifier equipment for Internet traffic monitoring. The device can be connected to the transmission line splitting port, efficiently copy the transmission data on the line and send it to the monitoring equipment without affecting the data transmission on the line. Mirror output port control function, can control the output switches of each port, control flow direction, with high security. The built-in module of the card can support multiple rates ranging from 100 Mbps to 10 Gbps. And it can also supports bidirectional 1*8 signal amplification.