Intermittent connection problem.

My internet connection goes down a few times everyday. It's totally random.

Here are some of the event logs on my modem/router:

2020-12-21, 22:50:34 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:b9:8a:dc:fd:28;CMTS-MAC=00:01:5c:63:16:69;CM-QOS=1.1;CM-VER=3.0;
2020-12-21, 22:49:45 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:dc:fd:28;CMTS-MAC=00:01:5c:63:16:69;CM-QOS=1.1;CM-VER=3.0;
2020-12-21, 22:40:24 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:b9:8a:dc:fd:28;CMTS-MAC=00:01:5c:63:16:69;CM-QOS=1.1;CM-VER=3.0;
2020-12-21, 22:40:24 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:dc:fd:28;CMTS-MAC=00:01:5c:63:16:69;CM-QOS=1.1;CM-VER=3.0;
2020-12-21, 22:30:31 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:b9:8a:dc:fd:28;CMTS-MAC=00:01:5c:63:16:69;CM-QOS=1.1;CM-VER=3.0;
2020-12-21, 22:30:31 Warning (5) MDD message timeout;CM-MAC=b0:b9:8a:dc:fd:28;CMTS-MAC=00:01:5c:63:16:69;CM-QOS=1.1;CM-VER=3.0;

There are many of these messages going on randomly. I suspect there is a line noise problem.

James