Innoptical's IN-DAC-400G-Dxxx QSFP-DD 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. QSFP-DD Cables (QSFP-DD DAC Cables) by Amphenol Now In-Stock at Speeds up to 800. 0 Gbps with 1600 Gbps Coming Soon! Amphenol is the leading QSFP-DD Direct Attach Cable (DAC) manufacturer and Cables on Demand offers you access to the same 400G and 800G QSFP-DD DAC Cables powering the world's most. The 400G DAC features two 400G QSFP-DD connectors and one passive copper cable, providing 400G data rates. 400G QSFP-DD DAC is a cost-effective alternative solution to 400G fiber optic products, quite suitable for short-range 400G Ethernet applications. QSFPTEK's 400G DAC is fully compliant to. Amphenol's QSFP DD (Quad Small Form Factor Pluggable Double Density) copper cable assemblies double the number of channels from 4 to 8 lanes when compared to the existing QSFP cabling systems, enabling more bandwidth within the same mechanical envelope. It provides a QSFP-DD-to-QSFP-DD copper direct-attach solution.