Well, I will check it over the phone by just connecting the modem as you want :) But the problem is that CRCs occur at certain times. It’s pretty normal in the morning. The hours when it increases are the hours I mentioned. On the Zyxel B10B 3312 modem, the yo-yo effect in these games becomes evident in the evening hours.
I understand only at certain times, remove PC and Monitor etc. and only leave ASUS Modem/Router plugged in and see if that helps over 24 hours ? Also as @Grisu said, maybe check with neighbour to see if they have same issues at the same time
Also maybe worth looking at buying the new ASUS DSL-AX82U (modem/router) or maybe the Fritz!box 7530 AX or the newer FRITZ!Box 7590 AX if you can purchase these in your region as these will work better with CRC etc .
https://www.asus.com/uk/Networking-IoT-Servers/Modem-Routers/All-series/DSL-AX82U/
https://en.avm.de/products/fritzbox/fritzbox-7590-ax/technical-specifications/
In a completely sane world, madness is the only freedom (J.G.Ballard).
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