If having the DIR-655 on a UPS were part of the problem, I would have probably seen it long ago. I have always kept my router and modem on the UPS, saves a lot of headache. Also, the router has rebooted once or twice on its own without the wireless being on. I am fairly sure that there are also ( but not 110% certain) that there are no 2.5ghz phones close by. But as was stated in a previous post, the reboots happened day or night, no given time, and I had changed to every channel with no change.