Connection drops multiple times a day, reboot, repeat.

Central Connecticut area

since Tuesday around 4 pm, our connection has dropped out failed to reconnect until I physically unplug the power and coaxial cable and wait 30 seconds to plug it all back in. This happens multiple times a day. My spouse works from home and has been for 4 years with absolutely no errors other than the occasional power outages.

i called cox and did some phone troubleshooting. I was told my modem was the likely cause, I purchased a new modem on Wednesday and installed it Wednesday night. Everything came back up looked good, but about 2 hours later dropped out again.

i have since tried unplugging all devices from the network and tried just the wireless router which is a TP-Link OnHub by itself and I plugged my spouse’s work router directly into the Ethernet port in the modem by itself. Both of these trials produced the same problem. Connected for a while then a complete drop and a physical unplug and reboot of the modem. 

a service tech came out plugged his troubleshooting modem into the line and ran tests and said everything looked fine with no errors. He went outside and looked at the drops into the condo and also the main connection box for the building. He said everything looked good. 

the new modem is an arris surfboard sb6183 (the only arris device available in a 20 mile radius from bestbuy) we had an arris sb6141 which until I replaced it was working great and I was getting around 200 down and 11 up. Now I get, when working, 94 down and 11 up with the new modem. 

a tech is coming out Monday to check the lines but I’m concerned they will just look and say it all looks fine and then leave again. All my reading and understanding points to a problem outside the house between me and the street. I’ve been researching all the issues I can and trying all possible solutions on my end but I can’t help but feel that I have to prove that inside devices are not the problem. 

im more frustrated that my spouse cannot work and they are currently the breadwinner and their boss is getting super frustrated with the connection issues. I can deal with loss of personal internet but when it comes to a paycheck and a job, I’m a bit less understanding and a bit less happy That the service provider can’t solve this quickly without me calling 8-9 times. 

here is the log form the router from this mornings reboot;