There are several possible reasons for experiencing a modem disconnection, here are some of the things you can do about them. You can either read this page straight through, or you may find this index handy for quickly tracking down problems that may sound plausible. What you can do about call waiting kicking you off. Timeout connections that may be in your software. The frustrating problem of line noise.
Communications overflow can cause problems for older computers connecting at high speeds.
Modems themselves can have defects in them. If you have one, there may be a problem with your digital line. Dialing through a PBX system can cause connection problems. If you have call- waiting active and your connection freezes up for a period of time, or you are disconnected suddenly and the phone starts ringing, this the most likely culprit of your problems. We do this to allow other users to access the line should you forget and leave your unit connected for a long period of time.