Hardware Problems:

If the previous solutions didn't resolve your problem, it is possible your frequent disconnections are caused by a modem malfunction. This may even be the case with a brand new modem. A modem can overheat, which can cause flaws in the electronic components. Or, if the phone line was left plugged in during a storm, an electric surge may have damaged it. You may want to contact the computer or modem manufacturer for further help.