An automatic fire alarm system is designed to detect the unwanted presence of fire by monitoring environmental changes associated with combustion. In general, a fire alarm system is classified as either automatically actuated manually actuated, or both to control the spread of fire and smoke..
Biometrics (or biometric authentication) refers to the identification of humans by their characteristics or traits.Biometrics is used in computer science as a form of identification and access control.It is also used to identify individuals in groups that are under surveillance.
An intrusion detection system (IDS) is a device or software application that monitors network or system activities for malicious activities or policy violations and produces reports to a management station. Some systems may attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system.
Video door entry is a stand-alone system used to manage calls made at the entrance to a building with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is that it enables the person indoors to identify the visitor.