We have had Comcast service for a few months....internet and landline telephone. The first month everything was great. The interenet is still fantastic but last month while talking on the phone, there were loud beeping sounds. They are NOT call waiting or anyhting like that. Very random and throughout the call, sometimes one beep, sometimes several in a row or close to a screaching sound. It is so loud that we tried putting the call on speakerphone but it still happened. Caller on the other end cannot hear the sounds. I even replaced the phones thinking that it was the actual phone that was going bad.