When the link has to go farther, this 10GBASE-ER SFP+ module gives you the reach to keep backbone and campus connections in service. Designed for Cisco SFP-10G-ER compatibility, it delivers 10 GbE over single-mode fiber with a maximum distance of 40 km. That makes it a strong fit for extended aggregation paths, inter-building links, and other long-reach optical deployments where short-range modules fall short. The LC connector and 1550 nm wavelength match the requirements of ER-class optics, helping ensure clean integration into existing fiber infrastructure. As an SFP+ transceiver, it supports hot-swappable installation, so replacements can be handled quickly during maintenance without unnecessary disruption. Standards-based design also helps reduce procurement risk when you need a dependable replacement or expansion optic for production environments. For teams that value reach, compatibility, and predictable optical behavior, this module is built for the kind of network segments where downtime is expensive and margin matters. It is the right choice when your design calls for long-distance 10 GbE without moving to a different platform or overbuying capacity.