NKOPT-400G-FR4 Nokia Optical Compatible 400G QSFP-DD FR4 Transceiver

For inside-plant 400G links between racks, rows, and adjacent buildings, the NKOPT-400G-FR4 is an FR4 optic in the QSFP-DD form factor reaching 2km over single-mode fiber. It seats in the QSFP-DD cage through a duplex LC interface, comes up coded to the host with no configuration, and reports live DDM diagnostics once the link is established.

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

Compatibility: Documented OEM compatibility (Nokia published compatibility documentation): this module is accepted in 400G QSFP-DD ports on the 7220 IXR Series, 7250 IXR Series, 7730 SXR Series, 7750 SR Series, and 7950 XRS Series. Confirm your exact chassis, line card, and OS release against the Nokia matrix before deployment.

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

It is validated for use on Nokia Optical platforms and negotiates the FR4 link exactly as the original would. Manufactured to MSA specification and individually verified, so the 2km single-mode span behaves as designed. Backed by the GreenLights4Life® Limited Lifetime Replacement Warranty. Orders placed today ship same or next business day.