JNP-QSFPDD-400G-ER4 Juniper Compatible 400G QSFP-DD ER4 Transceiver

The JNP-QSFPDD-400G-ER4 is a 400G QSFP-DD optical transceiver engineered as a drop-in equivalent for Juniper platforms,, recognized by the host as a genuine module and ready to pass traffic the moment it seats with no CLI changes.

• Form Factor: QSFP-DD
• Data Rate: 400G
• Protocol: ER4
• Fiber Type: SMF
• Reach: 40km
• Connector: Duplex LC
• OEM Equivalent: JNP-QSFPDD-400G-ER4

Compatibility: Documented OEM compatibility (Juniper published compatibility documentation): this module is accepted in 400G QSFP-DD ports on the ACX7100 (ACX Series), MX10004/MX10008 (MX Series), PTX10000 Series, QFX5130 Series, QFX5220 Series, and QFX5700 Series. Confirm your exact chassis, line card, and OS release against the Juniper matrix before deployment.

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

Extended-reach optics push single-mode links out to metro distances, connecting sites across a city or campus where standard long-reach modules run out of optical budget. It is the right tool when the span is too far for an LR but does not yet justify coherent line-side gear. It operates 40km.

Because it is coded to the Juniper host platform, the switch or router reads it as a factory module — clean in diagnostics, free to mix with OEM and other compatible optics in the same chassis, and needing no firmware exceptions.

Each unit is programmed to match Juniper host values and bench-tested for traffic conformity, DOM-threshold accuracy, and optical cleanliness before it leaves the bench. Class 1 laser certified and RoHS compliant.

Backed by the GreenLights4Life® Limited Lifetime Replacement Warranty. In-stock items ship same or next business day — contact 10.4@tenfouroptics.com to confirm availability and lead time.