@vst
It seems I've lost my mind.
The point is that the ping checker was turned on, as soon as I turned it off, the cyclic reboot of the modem disappeared..
Good time.
I'm struggling with this problem. I connected the modem to the router, but my connection constantly restarts and the modem becomes unavailable.
I am attaching the log file for your study.
Sincerely. Vadim V.
logs.txt