GIGALIGHT 200G QSFP56 CWDM4 optical transceiver module is used for medium distance interconnection between devices within data centers and is compliant with IEEE 802.3cn 200GBASE-FR4 Ethernet transport protocol. This product can convert 4-channel 53.125 Gbps electrical data to 4-channel optical signals, and multiplex them into a single channel for 212.5 Gbps optical transmission. Similarly,it optically de-multiplexes a 212.5 Gbps input into 4-channel signals, and converts them to 4-channel output electrical data on the receiver side.Maximum link length of 10 km on SMF.