JNP-QSFP-40G-CSR4 Juniper Compatible 40G 400m MMF Transceiver

The JNP-QSFP-40G-CSR4 is a 40G QSFP optical transceiver engineered as a drop-in equivalent for Juniper platforms,, a like-for-like replacement that the host accepts as native, hot-swappable and ready out of the box.

• Form Factor: QSFP
• Data Rate: 40G
• Fiber Type: MMF
• Reach: 400m
• Connector: Duplex LC
• OEM Equivalent: JNP-QSFP-40G-CSR4

Compatibility: Documented OEM compatibility (Juniper published compatibility documentation): this module is accepted in 40G QSFP+ ports on the EX3400 Series, EX4600 Series, EX4650 Series, PTX10000 Series, QFX10000 Series, QFX5100 Series, and QFX5120 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.

It is qualified against Juniper host platforms and tested end to end so it behaves exactly as the OEM module it replaces, slotting into existing designs without surprises. The result is a like-for-like swap that protects the original network design while removing OEM-optics cost from the bill of materials. It operates 400m.

Coded to the host EEPROM, it comes up as a genuine module: full diagnostic visibility, no compatibility warnings, and side-by-side operation with optics already in the chassis.

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.