ADT Frequently Asked Questions

When I Use My Phone Line, Does it Affect My Alarm Monitoring Service?

If you're considering an ADT monitored home security system, it is good to know that the system can contact the ADT monitoring center while you're using the phone. If your home's alarm is activated while you're on the phone, the ADT monitored security system will seize the phone line and call one of the four ADT monitoring centers. As soon as the monitoring center is contacted, the system will release the line so you may speak with an ADT monitoring center professional. Even if your home phone has call waiting, the security system will take over the phone line and alert the ADT monitoring center that your home's alarm was activated.

You may want to consider adding CellGuard® to your ADT monitored home security system for an enhanced sense of security. With CellGuard®, you don't need a home phone line. When your home's alarm is activated, CellGuard® uses a cellular network instead of a landline to contact the ADT monitoring center. If you want to keep your home phone, CellGuard® acts as a backup. If your home's alarm is activated but your home phone is out of service, CellGuard® contacts the ADT monitoring center via cellular technology. If you decide to switch from a home phone to a Voice over Internet Protocol (VoIP) communication system, you should contact an ADT monitoring specialist first. ADT monitoring can tell you whether your security system is compatible with the VoIP provider you're considering.