reply to DrDrew
Re: [OK] Another day, another Cox outage I am using a desktop that is hardwired and a laptop in a docking station that is hardwired. Both run through my UPS as does the networking gear.
When they were out in November, they did have a multimeter out looking for any electrical noise on the coax and didn't find any.
Interesting theory you have - next time it happens, I'll grab one of my other laptops and check it.