QSFP-DD:The four-channel small pluggable double-density packaged optical module doubles the density of QSFP28 or QSFP56. It has 8 channels and each channel has a rate of up to 25G or 50G, so it supports 200G or 400G optical transmission.

400G DAC passive copper cable assembly feature eight differential copper pairs,providing four data transmission channels at speeds up to 56Gbps(PAM4) per channel,and meets 400G Ethernet and InfiniBand Enhanced Data Rate(EDR) requirements.Available in a broad rang of wire gages-from 26AWG through 30AWG-this 400G copper cable assembly features low insertion loss and low cross talk.