Door Telephones  Manufacturers, Traders, Suppliers

Door intercoms are also known as intercom systems. They serve as a means of communication between front door and front door. Tones and speech are transmitted with the help of electrical signals. The signal transmission method of an ordinary telephone is used. Such systems are mainly used for internal communication in security-relevant areas. There are different variants. There are intercom models with and without handset. The latter can then communicate at the touch of a button, similar to a radio.