richeeee

On a regular basis, I lose signal to AIrport Extreme which in turn crashes my Teleblend VOIP. Comcast is my provider. I restart the Airport and it is OK for a while and then it crashes again. Where should I start to look for problem? When it is working, it is perfect and then something goes awry. Could the Airport be the culprit? Or is something triggering this crash? I have a Motorola modem SB5120, Roku, Apple TV and Scientific Atlanta 8300HD.