What is inter phone?

An intercom, short for intercommunication device, is a stand-alone voice or video communication system that allows individuals to communicate within a building or a specific area without the need for a telephone network. Intercoms are commonly used in homes, offices, and public buildings for security and convenience, enabling communication between rooms or with entry points. They can be wired or wireless and may include features like video displays, door release functions, and integration with home automation systems.