I have lately been experiencing a loss of internet for short periods of time. The connection drops for about a minute only but it does happen fairly frequently and nearly every hour at times. I know it is not a wifi issue as it also affects devices which are connected by ethernet cable. When the connection is working I am achieving very good fast speeds around the 350 range which I am subscribed to.
I have been keeping an eye on the router status and I have noticed that the upstream channels vary in number between 3 and 4 and the modulation varies between 16 and 64 QAM at different times of day. Looking at the table lower down on the upstream tab I can see varying numbers of timeouts usually in the T3 or T4 column and usually affecting one or two channels only.
The network log shows the same warning about ranging response repeating again and again throughout the day. I will post a reply with the tables separately due to the 20,000 characters limit.