Cisco 400G QSFP-DD Active Optical Cable, 20 m | QSFP-DD, 400G — QDD-400-AOC20M=

Deliver 400G connectivity across longer interconnect runs with Cisco’s 20 m QSFP-DD active optical cable. Built for high-density network environments, it gives infrastructure teams a cleaner way to connect equipment across rows or between cabinets while keeping cable paths manageable. The 20 m reach is useful when adjacent-rack placement is not enough and you still want to avoid the bulk, weight, and routing constraints of copper alternatives. In practice, that means easier installation, better cable organization, and fewer obstacles to airflow in tightly packed enclosures. This cable is a practical choice for teams standardizing on 400G optics and looking for a fixed-length solution that supports disciplined physical design. It fits well in leaf-spine fabrics, aggregation layers, and other enterprise deployments where link speed, layout consistency, and maintenance access all matter. For organizations investing in 400G infrastructure, Cisco’s active optical cable offers a straightforward way to extend reach while keeping the network room clean, serviceable, and ready for scale. Ideal For Connect racks across a data center row in a 400G fabric Link switches to aggregation gear where 7 m is not enough Reduce cable clutter in high-density network enclosures Standardize longer 400G optical interconnects across enterprise deployments Why This Product 1 20 m reach for longer rack-to-rack deployments 2 Active optical design for cleaner high-speed routing 3 QSFP-DD interface for 400G infrastructure 4 Cisco-qualified cable for enterprise network standards