JX-SFP-1GE-SX Juniper Compatible 1G SFP SX 550m MMF Transceiver

The JX-SFP-1GE-SX is a 1G SFP 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: SFP
• Data Rate: 1G
• Protocol: SX
• Fiber Type: MMF
• Reach: 550m
• Connector: Duplex LC
• OEM Equivalent: JX-SFP-1GE-SX

Compatibility: Documented OEM compatibility (Juniper published compatibility documentation): this module is accepted in 1G SFP ports on the ACX Series, EX2300 Series, EX3400 Series, EX4300 Series, EX4400 Series, MX204/MX Series, QFX5120 Series, and SRX Series. This module follows Juniper'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.

As a 1G short-reach module over multimode fiber, it is the classic access-layer optic for in-building uplinks, IDF-to-MDF runs, and edge-switch aggregation where copper distance falls short. It remains a staple in campus and enterprise networks still running gigabit to the closet over installed multimode. It operates 550m.

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.

Before shipment every module is coded to the host platform, then verified for protocol conformity, diagnostic accuracy, and end-face cleanliness. Class 1 laser certified, RoHS compliant.

Backed by the GreenLights4Life® Limited Lifetime Replacement Warranty. In stock and ships same or next business day.