Sequential Alarm Verification
This alarm verification method is based on using sequential alarms from two, separate detectors to determine whether a break-in has occurred. Two alarms received within a short period of time confirm the high probability of a genuine or attempted break-in.
The first alarm signal (unconfirmed alarm) is generated when the intruder penetrates the building and activates a detector. If the movements activate another detector or device, a second (confirmed alarm) signal is sent to the monitoring station. Only then are the response authorities notified.
Visonic's sequential alarm verification solution complies with the DD234 standard.
