Worked for me from 05202222 to 11202222. One fine night, I gave up and stopped supplying power to the ports configured to work with PoE (a couple of cameras and a Wi-Fi access point). Surprisingly, all other functions work without problems. It didn't even have to be reloaded. When you select the PoE menu, it thinks for a long time and ends with an error, something like: "PoE was abnormal (access fail)!". The internets are suggesting that this is some kind of hardware problem inside the switch. Warranty yok. I won't buy again, of course.
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