QDD-400G-FR4-S Cisco Compatible 400G QSFP-DD FR4 2km SMF Transceiver

On Cisco 400G hardware the QDD-400G-FR4-S comes up as a recognized module and passes traffic with no host configuration. It is a QSFP-DD optic delivering 400G over single-mode fiber to 2km in the FR4 grade, terminated on a duplex LC pair. The 2km FR4 reach on single-mode plant covers data-center-interconnect and campus 400G aggregation, and the module streams real-time optical diagnostics over DDM once the port is live.

• Form Factor: QSFP-DD
• Data Rate: 400G
• Protocol: FR4
• Fiber Type: SMF
• Reach: 2km
• Connector: Duplex LC
• OEM Equivalent: QDD-400G-FR4-S

Compatibility: Documented OEM compatibility (Cisco published compatibility documentation): this module is accepted in 400G QSFP-DD ports on the ASR 9000 Series, Catalyst 9500 Series, Catalyst 9600 Series, Cisco 8000 Series, NCS 540 Series, NCS 5500 Series, Nexus 3000 Series, Nexus 9300 Series, Nexus 9500 Series, and Nexus 9800 Series. This module follows Cisco's published compatibility matrix; for your exact line card or OS release, email 10.4@tenfouroptics.com and we'll confirm fit.

Tested & Proven: Every TenFour Optics part is coded, tested, and verified before shipment — see Tested & Proven.

MSA-compliant and individually bench-verified before shipment. Backed by the GreenLights4Life® Limited Lifetime Replacement Warranty. Stocked; ships same or next business day.