- Web Development
How to Measure Your Website's Performance
11 Mar, 2026
£35.14 inc. VAT
AI-generated summary
For £29.23 ex‑VAT, this is exactly the kind of “keep things running” SFP+ you buy when you’ve got a Fibre channel/10GbE switch that’s already sorted and you just need a working optics replacement or spare. It’s the right fit for short‑reach 10GbE over **multimode** fibre with LC connectors (the “up to ~300m” claim is believable in typical datacentre patching scenarios, assuming you’re within the usual multimode distance/budget). If you’re cost‑conscious and you’ve confirmed the switch model supports compatible SFP+ optics, it’s good value—most people aren’t paying for magic here, they’re paying for link stability.
That said, I wouldn’t treat these as a universal “it’ll work anywhere” module. Some network gear can be picky about vendor optics compatibility, firmware/DOM expectations, or threshold settings, so the risk isn’t the fibre distance—it’s **interoperability** (especially on Fortinet models if you haven’t already proven that exact equivalent). Also, if you actually need longer reach or single‑mode fibre, this becomes the wrong tool quickly. Bottom line: buy it if you’re replacing an existing short‑reach multimode 10GbE optic and you’ve verified compatibility with your specific switch—skip it if you’re rolling optics broadly across mixed vendor equipment or you’re not sure your link budget matches the multimode assumptions.

STARTECH
StarTech.com Cisco GLC-SX-MMD Compatible SFP Module, 1000BASE-SX, 1GbE Multimode Fiber MMF Optic Transceiver, 1GE Gigabit Ethernet SFP, LC 550m, 850nm, DDM, Cisco Firepower, ASR920, IE2000 - Lifetime Warranty (GLCSXMMDST) - SFP (mini-GBIC) transceiver module (equivalent to: Cisco GLC-SX-MMD) - 1GbE - 1000Base-SX - LC multi-mode - up to 550 m - 850 nm

TP-Link
TP-Link TL-SM331T V1 - SFP (mini-GBIC) transceiver module - 1GbE - over CAT 5e - 1000Base-T - RJ-45 - up to 100 m - for JetStream TL-SG3452XP V1

STARTECH
StarTech.com Gigabit Fiber to RJ45 Ethernet Media Converter, Micro Mini - Fibre media converter - 1GbE - 1000Base-T, 1000Base-LX - RJ-45 / LC single-mode / LC multi-mode - up to 10 km - 1310 nm - TAA Compliant

TP-Link
TP-Link TL-SM5220-3M V1 - 10GBase direct attach cable - SFP+ (M) to SFP+ (M) - 3 m - twinaxial - passive