StarTech.com Juniper SFP-FE20KT13R15 Compatible SFP Module - 100BASE-BX-U - 100 MbE Ethernet BiDi Fiber (SMF)

Product Overview

AI-generated summary

If you’re looking for a cheap, drop-in way to get an extra 100BASE link over single-mode *BiDi* fiber, this StarTech SFP is the sort of “just make it work” module that can be great value. At ~£26.81 ex-VAT it’s priced like a practical spares item for small estates: access switches, media converters, or patching between racks where you don’t want to pay enterprise SFP premiums. The real-world win is simplicity—if your switch/router actually supports this BiDi wavelength pairing and doesn’t need a brand-specific part, you’ll get link without drama.

That said, I wouldn’t buy these if you’re trying to future-proof a mixed-vendor environment or you don’t know the exact optics you need. SFP compatibility issues tend to be the rule with budget optics: some gear is picky about vendor IDs, and BiDi setups are easy to get wrong if the “TX/RX direction” and wavelength pair aren’t what the other end expects. If you’re troubleshooting an existing link, confirm the current module type and alignment first—otherwise the savings can vanish fast in downtime. Overall: good buy for known-compatible 100Mb BiDi SMF use cases and for spares; risky/pointless if you’re unsure about compatibility or you just need “any SFP that fits.”