I have a Spectrum Cable Modem -> Synology RT2600ac router -> 1930 24 port AIO POE switch -> Ap11, 2 - AP11D, and 2 AP22 Wifi access points, and various other devices hardwired to the network. All AP's are POE through the switch, which is connected to a UPS. At least once a day wifi access drops across all APs and when I look at the AIO alert log, it shows that APs and/or the switch were unreachable ("offline"):
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RG Frigo
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