Don't buy this unless you plan to buy two and wire them together to go copper > fiber > copper 10000Base-T RJ45. As far as plugging them straight into something like a Cisco Gbic 1000-Base SX SC to run fiber straight from your switch and converting to RJ45 at a workstation, they don't get the job done. Also, they won't auto-negotiate, so you'll have to manually configure the adapter, which is misleading when the device says the word "smart."
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