Found this while diagnosing a really bad home LAN performance issue. First, Cox Communications broadband used to be great when I moved in about 5 years ago. Now? It’s utter shite. Anyway, I’ll save that rant for later…check out this site I found that will help you figure out what channels are being used. First, your browser will ask for permission to load their applet then it will load a simple web page that tells you what channels are free from other wifi routers in your area, thereby giving you the ability to choose which channel is best for you to use. Simple.