What is a Diaphone?
A intercom is a device that enables voice communication between a person at a door and someone inside a building, commonly used in apartment blocks, schools, workplaces, and offices. More advanced than a standard doorbell system, an intercom allows for two-way conversation and makes voice messaging more practical. (Defined under “Calling and Notification Systems”.)
(Generated by Artificial Intelligence.)
Working Principle
An intercom system consists of a central unit and subsidiary units connected to individual apartments or rooms. When a visitor rings the doorbell, a connection is established through the central control unit by pressing the corresponding button. When the talk button is activated, the voice from the central unit is transmitted to the respective apartment, enabling two-way communication. Each unit can independently call the central unit.
Low-Voltage System and Cabling
Intercom systems fall under low-voltage installations. These systems typically operate at 12–24 V and use specially coded cables such as DT8 or DT9. This low voltage ensures the safe operation of intercom systems and poses no risk to people.
(Generated by Artificial Intelligence.)
Applications and Development
Intercom systems have largely replaced traditional doorbell systems. They are widely used in apartment building entrances, administrative buildings, schools, and manufacturing facilities. Today, video intercom systems enable both audio and video communication.
