eWON Flexy Rebooting from pla- Modem error & watchdog timer in process (ppp)

I have an eWON at the remote location which keep on the rebooting multiple times a day. In the logs following warning are there.

pla–Modem Error ( Com not detected).
Reboot reason: Watchdog in process (ppp).

eWON.tar (432 KB)

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