Basic machinery of a home security system includes control panel, key pad, backup battery, telephone line seizure, a digital dialer linked to a central monitoring station, a siren, inside motion detectors, door and window sensors. A control panel operates the whole process and a touch pad is required to enter our command. A siren is required to announce arrival of intruders and also scare them. Some alarm systems dial police station automatically or sound loud. Poor quality alarms may also raise false alarms and just harass everybody around. There are different kinds of sensors available such as magnetic contacts, infrared, photoelectric, ultrasonic or microwave detectors, window shock sensor and so on. One can also install closed-circuit TV and private television system to monitor inside or outside activities. While installing a centrally operative security system there is choice between wired and wireless, each of them having their own advantages and disadvantages.

A good system can give protection to possessions, peace of mind and a sense of being secure. It should cover the whole home. If at all one decides to implement a home security system, one should go for good quality even if it costs little more. Reliability is the most important thing.