StarTech.com Cisco SFP-25G-LR-S Compatible SFP28 Module, 25Gbps Single Mode Fiber (SMF), 10km (6.2mi), LC Connector, 1310nm, MSA 25 Gigabit Optical Transceiver

Product Overview

AI-generated summary

At ~£119.63 ex-VAT for a 25Gb SFP28 LR-style single‑mode module, this is the kind of thing you’d buy when you need the link and don’t want to pay Cisco-level prices—but you’re still buying something “real” rather than cheap and cheerful. In day-to-day reseller life, these StarTech-compatible optics tend to be a decent sweet spot for reliability, especially for straightforward 10km single-mode runs using LC and standard vendor optics behaviour. If your switch supports MSA optics cleanly, you can usually plug-and-play without drama, and the cost/port savings are genuinely meaningful at scale.

That said, I wouldn’t buy it blindly if you’ve got any history of picky firmware/compatibility issues on your specific switch model, or if you’re doing anything more exotic than standard single-mode LR links. With third-party optics, the risk isn’t “it won’t work at all,” it’s that you might lose time to compatibility quirks (DOM recognition, thresholds, or optics warnings) and end up needing the vendor to confirm. If you’re equipping a lab or production network where downtime is painful, it’s worth testing one module first or confirming support via your switch vendor’s compatibility list.

**Who should buy:** teams standardising 25GbE single‑mode 10km links on compatible switches and wanting lower cost per port. **Who shouldn’t:** anyone with strict optics policies, very locked-down network gear, or no appetite for a quick proof test before rolling out.