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Constant Internet Disconnects Every 5 Mins Due to Dynamic Range Window Violation

Hello.

I've been having a lot of trouble with my Cox internet lately due to constant internet drops.

The internet has been so unstable that it disconnects about every 5 minutes making my home internet useless.

When checking the router logs I noticed that the message consistent with the drops are noted by "Dynamic Range Window Violation".

As per the advice of the online Cox Support representative, I replaced my modem/router setup; did not improve/solve the problem.

During the disconnects, the UPSTREAM LED constantly blinks indicating that there may be some trouble with the upstream channels bonding.

Currently using a NETGEAR CM500 modem connected directly to the wall without a splitter.

I appreciate any and all help!!

Sample Event Log:

2017-6-26, 22:49:15	Warning (5)	Dynamic Range Window violation
2017-6-26, 22:49:46	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=redacted;CMTS-MAC=redacted;CM-QOS=1.1;CM-VER=3.0;
2017-6-26, 22:50:00	Warning (5)	Dynamic Range Window violation
2017-6-26, 22:50:46	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=redacted;CMTS-MAC=redacted;CM-QOS=1.1;CM-VER=3.0;
2017-6-26, 22:50:46	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=redacted;CMTS-MAC=redacted;CM-QOS=1.1;CM-VER=3.0;
2017-6-26, 22:50:46	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=redacted;CMTS-MAC=redacted;CM-QOS=1.1;CM-VER=3.0;
2017-6-26, 22:51:45	Warning (5)	Dynamic Range Window violation
2017-6-26, 22:52:31	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=redacted;CMTS-MAC=redacted;CM-QOS=1.1;CM-VER=3.0;
2017-6-26, 22:52:32	Warning (5)	Dynamic Range Window violation
2017-6-26, 22:52:46	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=redacted;CMTS-MAC=redacted;CM-QOS=1.1;CM-VER=3.0;
2017-6-26, 22:53:15	Warning (5)	Dynamic Range Window violation