QSFP56-DD 400G FR4 Transceiver Juniper QDD-400G-FR4 | QSFP56-DD, 400G, FR4

Move 400G traffic across single-mode fiber with an optic designed for high-density switching environments. Juniper QDD-400G-FR4 delivers FR4 transport in a QSFP56-DD form factor, giving infrastructure teams a clean path to high-capacity uplinks without expanding rack footprint. Built for 400 GbE deployments, this transceiver supports the bandwidth required for leaf-spine fabrics, aggregation layers, and other performance-sensitive network segments. FR4 optics are a practical fit where reach, density, and predictable optical behavior matter more than lower-cost short-reach alternatives. That makes this module well suited for teams standardizing on 400G infrastructure while keeping cabling and port utilization under control. For procurement and architecture teams, the value is straightforward: preserve switch density, support longer single-mode runs, and keep the network ready for sustained east-west traffic growth. When the design calls for 400G optics that fit enterprise-grade deployment standards, this Juniper module belongs on the shortlist.