You don't say what provider you have, but I seem to recall that it's Verizon. When I'm using my computer (or his) on Dad's Verizon service in New Jersey, it gets dropped regularly after an unknown period of activity. The only fix that works if it is my computer is to turn of the Westel modem for a couple of minutes and then turn it on again. From his computer, the connection can be reestablished through the connection manager program that is part of the Verizon software.