Arista 1Gbps 1000Base-LX Single-mode Fiber 10km 1310nm Duplex LC Connector SFP Transceiver Module – SFP-1G-LX

Arista SFP-1G-LX 1000BASE-LX SFP Transceiver

Fiber links that span a campus or reach a carrier handoff need optics built for distance, and this module delivers exactly that. The Arista SFP-1G-LX sends 1Gbps Ethernet over a 1310nm signal that travels up to 10km on standard single-mode fiber, making it the workhorse choice for building-to-building links, demarc extensions and long backbone runs where copper simply cannot go. It is hot-pluggable, MSA-compliant and reports its health digitally, so a switch operator can watch light levels and temperature from the management interface instead of guessing from across the building.

Key Features

• 1000BASE-LX operation at 1Gbps line rate
• 1310nm optics with up to 10km reach over single-mode fiber
• Duplex LC connector for standard fiber patching
• Hot-pluggable, MSA-compliant SFP form factor
• Digital diagnostic monitoring for light level and temperature
• Arista-validated coding for native recognition in Arista switches

Product Specifications

• Form Factor: MSA-compliant SFP, hot-pluggable
• Data Rate: 1.25Gbps (Gigabit Ethernet 1000BASE-LX)
• Wavelength: 1310nm
• Reach: up to 10km over single-mode fiber (9/125 micron)
• Connector: duplex LC
• Monitoring: digital diagnostics (DDM/DOM) per industry standard
• Power: low-power 3.3V operation
• Compliance: IEEE 802.3z Gigabit Ethernet over fiber

Use Cases

Drop this into a pair of switches to stitch two buildings together over existing single-mode strands, terminate a carrier fiber handoff at your edge, or extend a storage or security network segment across a campus that outgrew copper. It is equally handy in labs and test benches where a long-reach 1G link is needed without the cost of 10G optics.

Compatibility

The module follows the IEEE 802.3z 1000BASE-LX standard and the MSA SFP mechanical and electrical spec, and it is coded for native recognition in Arista switches equipped with 1G SFP ports. It mates with standard duplex LC single-mode patch panels and patch cords, and over multimode fiber it can run shorter 1000BASE-LX distances when paired with a mode-conditioning cable.

Frequently Asked Questions

How far can it transmit?

Up to 10km on single-mode fiber with 9/125 micron cabling, using a duplex LC connection.

Can I use it on multimode fiber?

1000BASE-LX can cover shorter multimode distances of up to 550m when a mode-conditioning patch cord is used to align the laser with the fiber core.

Does it support diagnostics?

Yes. Digital diagnostic monitoring reports received light levels, transmit power and temperature to the switch so link health can be tracked remotely.

Will it work in other brands of switches?

It is an MSA-compliant module coded for Arista; other vendors may require their own coded optics or may accept third-party MSA modules depending on their configuration.

Long-reach 1G optics have quietly become the most dependable tool in the network drawer, and this one earns its keep by being boring in the best way: standard-compliant, self-reporting and ready to slide into any open SFP bay. For anyone extending a network across buildings, floors or a carrier boundary, the SFP-1G-LX turns single-mode strands already in the wall into reliable gigabit capacity.