400G QSFP-DD To 8x 50G SFP56 DAC It complies with the QSFP-DD MSA and SFP56 MSA standard specifications and provides connectivity between system units with a QSFP-DD(QSFP56-DD) port on one side and up to eight SFP56 ports on the other side. Provides reliable connectivity between 400G Ethernet and 50G Ethernet systems. It consists of 8 channels, each with a data rate of up to 50Gb/s(PAM4).