I have a problem with disconnections. This can be a mysterious problem because there are several ways to lose connection, some you can do something about, some you can't. There are problems that can even stump the phone company. With the majority of phone lines you should be able to have no or few disconnects.
Modems are very sensitive to line noise which is the main problem with disconnects.
Your call takes a very circuitous path to get to our end and several problems can occur between us. If you talk to your phone company about connection problems make sure they know that you are using the phone line for your computer and not just for voice. Another thing to check is to make sure there is no shorts in the phone wiring of your home. That means any wiring including the cable from the computer modem to the wall that might have a short and be loose. We have noticed that a lot of disconnects have been centered in certain regions of our service area.