It sends a radio signal to the console. The console automatically dials one or more pre-selected emergency telephone numbers.
Most systems can dial out even if the phone is in use or off the hook.
Most PERS are programmed to telephone an emergency response center where the caller is identified. The center will try to determine the nature of the emergency. Center staff also may review your medical history and check to see who should be notified. If the center cannot contact you or determine whether an emergency exists, it will alert emergency service providers to go to your home. With most systems, the center will monitor the situation until the crisis is resolved.