AddOn - QSFP28 transceiver module (equivalent to: Cisco QSFP-100G-SR4-S) - 100 Gigabit Ethernet - 100GBase-SR - MPO multi-mode - up to 100 m - 850 nm - TAA Compliant

Product Overview

AI-generated summary

If you’ve got a switch (or router) that supports the Cisco-equivalent QSFP28 100G SR4 style module, this AddOn transceiver is exactly the kind of “get it working without lighting money on fire” purchase that makes sense in the UK. At **£239.18 ex-VAT**, it’s usually priced for budget-conscious teams who want reliable short-reach connectivity for server/storage racks—think 100G links across a data hall or between nearby cabinets—rather than paying “brand tax” for the same basic job. In practice, these SR4 MPO modules are most valuable when you have a clean, stable fibre path and you’re simply replacing/adding optics to get capacity where it’s needed.

That said, I wouldn’t buy it blindly if your environment is picky. The biggest real-world risk with third-party optics is **compatibility/behaviour with specific switch models and firmware**—some platforms are tolerant, others get temperamental or require careful configuration to avoid link flaps or “unsupported module” warnings. Also, the “up to 100 m” type of claim only holds if your patching and fibre quality are genuinely in spec—if you’ve got older fibre, lots of connectors, or questionable patch leads, expect pain rather than performance. So: **buy it if you’ve validated that your exact switch model accepts this type of module** and your fibre run is straightforward; **avoid it if you need guaranteed plug-and-play behaviour across multiple unknown platforms** or you’re operating at the edge of reach.