It can happen that the alarm system, due to a malfunction, will hold onto the phone line and cause you to get no dial tone. On all systems, we have installed a CA38A alarm jack. This jack is at the main alarm panel, either on top, at the bottom or inside. It looks just like a normal phone jack. If you unplug that jack, and you find that your dial tone comes back, leave the jack unplugged and give us a call for service. If you unplug that jack but your phone is still dead, that indicates that the problem is an actual phone problem and you should call your phone provider for service.