QSFP-DD-400G DAC
The QSFP passive copper cable assembly features eight differential copper pairs, offering four data transmission channels with speeds up to 56 Gbps per channel, meeting the demands of 400G Ethernet and InfiniBand. Iti s available in a variety of wire gauges, ranging from 28 AWG to 30 AWG, and it is designed to minimize both insertion loss and crosstalk.
Using PAM4 signaling, QSFP doubles the data rate, but this also requires tighter control over cable insertion loss. For more details on performance specifications, please refer to the High-Speed Characteristics.