Cisco 400G QSFP-DD Active Optical Cable, 3M | Data Center Fiber — QDD-400-AOC3M

Keep 400G interconnects orderly and serviceable with Cisco’s 3 m QSFP-DD active optical cable. Built for short-reach data center deployments, it helps preserve signal integrity while avoiding the stiffness and congestion that can come with heavier copper cabling. The 3 m length gives infrastructure teams a little more routing flexibility for adjacent racks, top-of-rack to spine links, and other short-span connections where clean cable paths matter. In dense environments, that extra reach can make the difference between a cramped install and a layout that is easier to trace, maintain, and cool. With QSFP-DD connectivity and an active optical design, this cable fits modern 400G fabrics that demand compact, high-speed interconnects. It is a strong choice when you want the physical simplicity of a short cable run without compromising the discipline required in enterprise switching environments. Ideal For Connect adjacent top-of-rack and spine switches in a 400G network Link servers or appliances to nearby 400G switch ports Replace bulky copper cabling in dense rack rows Standardize short-reach 400G interconnects across data center deployments Why This Product 1 3 m reach for a bit more routing flexibility 2 Active optical design for cleaner high-speed signaling 3 QSFP-DD compatibility for 400G infrastructure 4 Less cable bulk than comparable copper assemblies