StarTech.com MSA Uncoded QSFP+ Module - 40GBASE-SR4 - Multi Mode Fiber (MMF) - 40GE Gigabit Ethernet QSFP+ - MPO 300m - 850nm ~MSA Uncoded QSFP+ Module - 40GBASE-SR4 - Multi Mode Fiber (MMF) - 40GE Gigabit Ethernet QSFP+ - MPO 300m - 850nm

Product Overview

AI-generated summary

For £34.66 ex-VAT this is a decent-value “fill the gap” QSFP+ SR4 module if you’ve got the right kind of optics already in play—i.e., a switch/host that will happily take **uncoded** optics and a multimode MPO backbone designed for the distance you’re targeting. In day-to-day terms, you’re not really buying performance here; you’re buying compatibility and a reliable link on the kind of 40GbE runs that often exist in datacentres and server rooms. If your environment is stable and you just need spares or to populate ports, it’s the sort of cost-effective part that makes life easier.

That said, “uncoded” is the catch. Some vendors gear their optics behaviour around vendor coding to control interoperability, and if your switch expects coded modules you may end up with link issues, warnings, or ports that won’t come up cleanly. Also, fibre type and connector cleanliness matter a lot—MPOs are unforgiving if the patching isn’t right. I’d buy this when you’re confident your networking kit supports un/uncoded QSFP+ SR optics and your multimode infrastructure is already established; I’d avoid it if you’re unsure about compatibility (or you need guaranteed plug-and-play across mixed vendor gear), because troubleshooting optics on a live system is rarely worth the saved money.