A wireless home security system is a burglar alarm that does not use wires to transmit messages; instead it uses radio waves to communicate. This leaves the burglar or the intruder clueless, who does not know which wires to cut to deactivate the alarm.
There are two kinds of wireless burglar alarms. The first is the one that goes off when an intruder breaks into a house. This alarm can only be heard by the home owner or the neighbors. The other is the monitored wireless alarm. In this case, the intruder’s entry is communicated to a security company which first checks if the alarm is genuine, and then informs the local police.
The heart – or what many call the brains -- of a wireless home security system is the control panel. It is generally located in a closet or a basement, and receives all wireless communications radioed by magnetic switches and motion sensors located in the house. The control panel is programmed to sound the alarm or dial the central monitoring system whenever it receives a suspicious movement or suspicious entry signal from the magnetic contacts.
The magnetic contacts, which are attached to windows and doors, comprise of two parts: a switch installed in the window or door jam and a magnet placed in the door or window. An alarm signal goes off whenever the distance between the switch and the magnet increases.
Body sensors are placed in large halls. They use the passive infrared motion detection method to sense motion or body heat. This motion is then signaled to the control panel which then analyzes the threat level before sending an alert to the central monitoring station.
Each wireless security system comes equipped with a keypad, which is used to arm or disarm the system. The keypad is normally installed next to the entry door so that the owner can activate the alarm system when leaving the house and deactivate it on returning.
The system can also be operated by remote keys which are like the car remote keys. The homeowner can use them to switch on lights from a distance to give an appearance that the house is inhabited.
Besides this, wireless systems can also use cameras, both hidden and wall-mounted to monitor movement. These cameras are connected to a video unit which is attached to a VCR. The VCR records all movement spotted by the cameras even when the owner is away.
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