StarTech.com Juniper SFP-FE20KT15R13 Compatible SFP Module - 100BASE-BX-D - 100 MbE Ethernet BiDi Fiber (SMF)

Product Overview

AI-generated summary

For £27.13 ex-VAT, this is the kind of “good enough” optics you buy when you need a working spare without paying the branded price. StarTech’s compatibility tends to be solid in real deployments, so if your switch/transceiver is being picky about standards, you’re not rolling the dice as much as you would with ultra-cheap generics. That said, this is for a very specific networking situation: bidirectional 100BASE-BX over SMF. If your links aren’t set up for BX (Tx/Rx directions) and you don’t have the right pair discipline in place, you’ll waste time debugging fiber when it’s really just the wrong optics type.

I’d buy it if you’re maintaining a legacy 100MbE environment and you just need a dependable replacement for an existing BX link—especially if you’re budget-conscious and want a spare on the shelf. I wouldn’t buy it if you’re building new or if you’re unsure what optics your gear expects; mismatches and “it powers up but won’t link” are common with BX when the Tx/Rx side is wrong. Also note the category label you gave (“USB cables & adapters”) is misleading—this isn’t a USB item. Make sure you’re ordering the right form factor for your switch/media converter before committing.