Добрый день! Роутер асус rt - n12vp регулярный обрыв, восстанавливается перезагрузкой роутера.

В чем может быть проблема?
Mar 17 12:55:28 rc_service: ntp 282:notify_rc restart_upnp
Mar 17 12:55:28 miniupnpd[281]: received signal 15, good-bye
Mar 17 12:55:28 miniupnpd[290]: HTTP listening on port 34070
Mar 17 12:55:28 miniupnpd[290]: Listening for NAT-PMP traffic on port 5351
Mar 17 12:58:58 pppd[244]: Serial link appears to be disconnected.
Mar 17 12:58:59 WAN Connection: Fail to connect with some issues.
Mar 17 12:58:59 stop_nat_rules: apply the redirect_rules!
Mar 17 12:59:04 pppd[244]: Connection terminated.
Mar 17 12:59:04 pppd[244]: Modem hangup