AXIOM 400GBASE-DR4 QSFP-DD for Cisco | 400G QSFP-DD, Data Center — QDD-400G-DR4-S-AX

Build 400G infrastructure without sacrificing port density. The AXIOM 400GBASE-DR4 QSFP-DD module is designed for Cisco-compatible environments that need short-reach 400G performance over single-mode fiber. It is well suited to modern data center fabrics where switch-to-switch links must move large volumes of traffic while keeping the optics layer compact and easy to standardize. DR4 optics are commonly selected when the network design calls for high-capacity links within the data center rather than extended interconnect distances. The QSFP-DD form factor supports dense switch architectures and helps preserve valuable front-panel space as port speeds rise. For teams planning refreshes, this module offers a clean fit for 400G uplinks, leaf-spine fabrics, and other bandwidth-intensive segments where consistency matters. Choose this optic when you want 400G performance, Cisco alignment, and a deployment profile suited to short-reach single-mode applications. It is built for infrastructure teams that need the optics layer to match the pace of the network, not slow it down. Ideal For Connect leaf and spine switches in a 400G data center fabric Support short-reach single-mode uplinks between adjacent network racks Standardize optics across Cisco-based 400G switch refreshes Add high-bandwidth interconnects to aggregation layers with limited front-panel space Why This Product 1 Short-reach 400G design for intra-data-center links 2 QSFP-DD supports dense 400G switch deployments 3 Cisco compatibility simplifies standardization 4 Single-mode fiber keeps the design aligned to modern 400G fabrics