Is there anyway to know when someone has picked up the phone while you are online, or some program that can stop it from interfering with the connection? I think someone is trying to disconnect me on purpose to be annoying.
Once most modems are connected, you won't hear anything on your modem/pc speakers.
I just tried goofing around with the phone line i'm on at work, lifting up the phone and hanging up serveral times, it seemed to not disturb the modem at all. If you have call waiting this might mess the modem up when someone calls you. You can go to your dial up modem settings and type in *70 before the phone number, this will cancel all call waiting and should help with some of the disconnects.