Hi ocdrummer,
I see that you have a tech visit setup for tomorrow, I had some questions regarding the cable modem. I was wondering when you lose connection do any of the lights on the modem change, indicating the modem has gone offline? I would like to take a look at the modem signal levels to see if there are any issues there. Have you tried connecting the computers to the router via ethernet cable (if possible)? Is it just the wireless connection that you are having trouble with? Can you e-mail your account information (name and street address) to coxhelp@cox.com, we can look into this further for you to narrow down where the issue is.