Here’s a weird one for you. I have a wireless network and when I answer my cordless phone it messes with my router.
Sounds like your phone is on the same frequency as the router. It may not happen all the time since many phones automatically switch channels to find the best one.
One thing you can do is change the channel on your router. This is done on the software end—check your owner’s manual or go to the website of your router’s manufacturer and look for a manual or help area.
Speaking of changing channels on your router… we had a problem where a computer kept trying to log onto the neighbor’s network. If you live in a condo or apartment and get strange interference, it could be that the Jones’ have a wireless network too. You should also change your channel when this happens.
David Samuel Thomas