Classification of intercoms. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Intercom classification. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Security and safety. Audio and video surveillance

According to their technical design, intercoms are divided into audio intercoms и video intercoms.

The audio intercom provides two-way voice communication between the subscriber and the visitor, which allows the latter to be identified by his voice. The intercom for the front door of an apartment is a simple technical tool that can eliminate burglary and robbery attempts, thereby increasing the safety of residents. Equipping the door with an intercom eliminates the need to leave the house once again.

At the entrance to the entrance, intercoms, such as an audio intercom, can be mounted.

The intercom performs the following functions:

- doorbell;

- two-way communication and telephone;

- electric lock control.

The body of this device can be made of plastic or metal. For outdoor installation, aluminum cases with a resistant coating are used, for internal installation - plastic ones (Fig. 109).

Classification of intercoms
Rice. 109. Audio intercom.

Author: Korshevr N.G.

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