AP188.8.131.52.2. Reporting: The PCU receives signals from
all sensors in a protected area and incorporates these signals into a
communication scheme. Another signal is added to the communication for
supervision to prevent compromise of the communication scheme. This
tampering or injection of false information by an intruder. The supervised
signal is sent by the PCU through the transmission link to the monitor
station. Inside the monitor station either a dedicated panel or central
processor monitors information from the PCU signals. When an alarms occur,
an annunciator generates an audible and visible alert to security
personnel. Alarms result normally from intrusion, tampering, component
failure, or system power failure.
AP184.108.40.206.3. Assessment: The assessment period is the
first phase that requires human interaction. When alarm conditions occur,
the operator assesses the situation and dispatches the response force.
AP220.127.116.11.4. Response: The response phase begins as
soon as the operator assesses an alarm condition. A response force must
immediately respond to all alarms. The response phase must also determine
the precise nature of the alarm and take all measures necessary to
safeguard the secure area.