AddOn Cisco QDD-400G-SR8-S 400G QSFP-DD Transceiver | MMF, TAA — QDD-400G-SR8-S-AO

Keep high-speed east-west traffic moving with a 400GBASE-SR8 QSFP-DD transceiver built for multimode fiber deployments. This AddOn Networks optic is Cisco-compatible and TAA compliant, making it a practical fit for enterprise environments that need both technical interoperability and procurement alignment. The SR8 design is intended for short-reach links in high-density switching environments, where 400 GbE capacity must be delivered without sacrificing rack space or operational clarity. Its QSFP-DD form factor supports modern aggregation and spine architectures, while the MPO interface aligns with multimode fiber plant already deployed in many data centers. For teams standardizing on 400 GbE, this module helps extend capacity without forcing a broader platform change. It is well suited for leaf-spine fabrics, top-of-rack uplinks, and other bandwidth-sensitive segments where predictable short-distance optics are preferred over more expensive long-reach alternatives. The TAA designation also simplifies sourcing for public sector and regulated buyers. When the requirement is to move more traffic through fewer ports, this transceiver delivers the right balance of density, compatibility, and compliance. Ideal For Leaf-spine uplinks in 400 GbE data center fabrics Short-reach interconnects over existing multimode fiber plant High-density switch upgrades requiring QSFP-DD optics Public sector or regulated procurement environments needing TAA compliance Why This Product 1 400 GbE capacity for high-density switching 2 QSFP-DD form factor for modern platforms 3 MPO multimode connectivity for short-reach links 4 TAA compliance for procurement-sensitive environments