GIGALIGHT 200G QSFP-DD PSM8 optical transceiver modules are used for medium to long distance interconnections in data centers and are compliant with 100G PSM4 MSA specification and 200G Ethernet transport protocols, as well as compatible with 8x10G/25G Ethernet and InfiniBand QDR/EDR transport protocols. The series uses 8 pairs of parallel single-mode fiber optic transmission with a central wavelength of 1310nm and distances up to 2km or 10km (both with FEC on), with optional industrial grade operating temperature range.