Intercom is an internal communication system used for voice or video communication between multiple parties within a building or between nearby buildings, without the need for public telephone networks.

🔹 Types of Intercoms:

• Audio Intercom: Allows two-way voice communication only.

• Video Intercom: Adds a camera and screen feature to display the visitor’s image with the ability to talk.

• IP Intercom: Operates through the Internet or local networks (LAN) and supports integration with surveillance and access control systems.

🔹 Main Components:

• Outdoor/Entrance Panel: Installed at the building’s entrance or gate, usually includes a call button, microphone, speaker, and a camera (in video systems).

• Indoor Monitor/Handset: A screen or handset installed inside the apartment or office to answer visitors.

• Central Control Unit (in some systems): Distributes communication to multiple apartments or offices.

• Cables or IP Network: Used to connect the units.

• Power Supply: Provides power to the system.

🔹 Uses:

• Communication between residents and visitors in residential buildings.

• Remote control of door or gate access.

• Enhancing security by identifying the visitor before granting access.

• Used in homes, companies, hospitals, and schools.