Keep critical fiber links stable with a 1000BASE-LX SFP designed for single-mode deployments. This AddOn transceiver operates at 1310 nm and supports up to 10 km of reach, making it a strong fit for campus uplinks, building interconnects, and long-run access aggregation where multimode optics fall short. The LC duplex interface aligns with common enterprise switching platforms, while the compact SFP form factor preserves port density in high-value network hardware. For teams standardizing on compatible optics, this module offers a direct path to replace HP J4859C transceivers without changing the surrounding fiber plant. Choose this module when link stability, reach, and procurement efficiency matter more than paying OEM premiums for the same deployment role. It is a straightforward way to keep production networks moving with the optical budget and connector profile your environment already expects.