CM500 losing internet connection and upload/download amber

Hi there, 

My CM500 intermitantly loses internet connection quite often (Sometimes 5+ a day, sometimes for up to 4+ hours before it decides to work again) . The upload and download will go amber, and then the internet light goes off completely. My old modem did not have this issue, and cox has already done a service call to my apartment to confirm that their lines are good. Netgear suggested using a power outlet instead of strip, but that didn't help either. The firmware is good. I've tried factory reset, and that did nothing. Thanks!