An Alarm System consists of
- Siren, strobe
- Extension zone module
- Telephone module, LAN/WAM module ...
that can detect unauthorized movements, forced opening of doors and windows, breaking glass, smoke, fire and leakage of cooking gas.
The brain of the system is the control panel. This panel is a metal box housing the electronics and is often hidden from sight. Various kinds of sensors are connected to the control panel by cable or wireless signal.
There are sensors for two basic types of protection: perimeter and interior.
Perimeter protection sensors are located at the vulnerable entry points of the home, such as doors and accessible windows. These would include magnetic contacts and glass-break sensors.
Interior sensors detect motion inside office. One example would be a Passive Infrared Detector (PIR) which detects motion through body heat. Smoke and fire detectors are other types of interior protection since they are located inside, usually high on walls or ceilings.
When a sensor reports a signal to the control panel, it analyzes the report to determine which sensor it came from and whether the problem is an intruder, fire or an emergency. After this quick analysis, the control panel can sound a siren or activate lights, and can alert a 24-hour monitoring service that then can verify the alarm and dispatch police, fire or medical help as necessary. Typically, the monitoring service is notified by a digital message sent over regular telephone lines or LAN/WAN.
- Name : Alarm system
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