Internet outage due to Received Response to Broadcast Maintenance Request

Hello,

My internet connection drops several time a day. Checking router logs I found:

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;**********CM-QOS=1.1;CM-VER=3.0;

This appears several times a day and it is the time when conection disappears.

I could you fix it wothou tech guy to come? Is it a problem of wrong cable instalation outside the apartment?

Thanks