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. This module follows Nokia'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.

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. In-stock items ship same or next business day.