Help: Internet Unusable daily now

Hello, thanks for your response. I have swapped out both modem and router several months ago; and neighbors are also complaining about the Cox service deteriorating, so I doubt that it's my equipment. Started with Cox Panoramic Wifi Gateway/Router: had service issues with that and replaced with Netgear nighthawk CM1100 Cable Modem and used a high end Asus Rog Rapture router which I replaced with a newer AXE7800 Tri-Band Wi-Fi 6E Router. So, again, doubt it's my equipment.  The signal levels fluctuate from great (I have 1gb service) to barely functioning (like AOL old dial up service) to no service now for days in the afternoon and evening hours at all.  I know and understand the intermittent issues are more difficult to troubleshoot, and I'm not the only person in my area experiencing this. So many are changing to Tmobile, Verizon or Google Fiber. Unfortunately, Cox is only option for the speeds I need, but since my speeds are deteriorating and many evenings/nights until morning I have no service at all, I may need to rethink this and get a different provider. 

Suggestions? Thanks again for taking the time to respond. 

Older, more established neighborhood, so it's possible it is the wiring in the neighborhood that is causing or contributing, I suppose. 

desertwind wrote:

So, again, doubt it's my equipment.

Yea, I didn't think it was your equipment, I just wanted to know what you had so I could troubleshoot it better. By signal levels I mean the DOCSIS signal coming over the coaxial line into the modem. See here on how to access them. There is also event logs there that might be helpful but don't post them without editing out the MAC address. If you can match up a disconnect or slow down with a specific error, then that is important. T3/T4 timeout errors are common and are caused by noise on the upstream. Last, can you describe how the coaxial gets from the street to the room the modem is in? Any splitters, filters or amps?

Yea, it could be the wiring in your area. Can you describe it? Are there poles?

Thank you so much for the clarification. I will come back and update this as soon as I can get the info you asked for. Behind in work so juggling because of the Internet issues. Will post back as soon as I can. Thanks again for your help. Appreciate you taking the time!