400G QSFP-DD to 400G QSFP-DD Active Optical Cable enables low-power, high-reliability and high-speed interconnections over very thin copper cables without using any optical components. It is designed for relatively short connections, offering a high-density solution alternative for system providers and customers implementing 400G in datacenters and Cloud Networks. It is compliant with IEEE802.3cd, OIF-CEI-04.0, QSFP-DD MSA and QSFP-DD-CMIS-rev4p0.400G QSFP-DD to 400G QSFP-DD Active Optical Cable enables low-power, high-reliability and high-speed interconnections over very thin copper cables without using any optical components. It is designed for relatively short connections, offering a high-density solution alternative for system providers and customers implementing 400G in datacenters and Cloud Networks. It is compliant with IEEE802.3cd, OIF-CEI-04.0, QSFP-DD MSA and QSFP-DD-CMIS-rev4p0.