Install the dial capable motion detectors in place of the entryway motion detectors. The mounting directions and hardware will be included in the motion detectors' packaging. Often the old motion detector's hardware will mount the new one.
Connect phone lines to the new motion detectors as instructed by the manufacturer. Usually the lines connect from the new motion detectors to a phone or third-party dialer.
Program the dialer or the dial-capable motion detectors to dial the phones of your choice. Your cell phone is usually the most important phone number to program into the dialer to alert you quickly if there is an intruder.
Arm the alarm as you normally would. If there is an intruder, the new motion detectors will sense the movement and will dial your phone to alert you.