GIGALIGHT 100G QSFP28 PSM4 immersible cooling optical transceiver modules are used for medium to long distance interconnections in data centers and are compliant with the 100G PSM4 MSA specification, as well as compatible with 100G Ethernet and InfiniBand EDR transport protocols. The series uses 4 pairs of parallel single-mode fibers with a central wavelength of 1310nm for transmission over distances of up to 2km/10km (FEC enabled), with MPO12/APC connectors on pigtails and customizable cable lengths.