Intercommunication System

Also found in: Dictionary, Thesaurus.
Related to Intercommunication System: Intercommunication device
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Intercommunication System


(two-way loudspeaker communication), a type of internal wire communication for the rapid transmission of information, calls, orders, reports, and messages. By using specially laid internal communication lines that restrict the number of subscribers, an intercommunication system can rapidly connect, for example, a plant manager with a shop superintendent or a division chief with laboratory heads.

A distinction is made between simplex and duplex intercommunication systems. In a simplex system, information is transmitted over the line in only one direction—that is, one party speaks, and the other only listens. The simplest such system (Figure 1,a) consists of a microphone, an amplifier, a loudspeaker, and a wire communication line. If a loudspeaker is installed at the transmitting end and a microphone at the receiving end, then it becomes possible to converse in either direction by switching the amplifier input and output.

Figure 1. Diagram of an intercommunication system: (a) simplex, (b) duplex, (M) microphone, (A) amplifier, (C) communication line, (L) loudspeaker, (ADS) automatic direction-switching apparatus

The simplest duplex intercommunication system (Figure l,b) consists of two receiving-transmitting devices that include microphones with transmitting amplifiers, loudspeakers with receiving amplifiers, and automatic switching apparatus for the direction of communication (or differentiating apparatus). In this case both parties are able to speak and listen at the same time, in the same way as with an ordinary telephone. Intercommunication systems are used in government and public establishments, in research institutes and design offices, in factory administrations, and in production sectors with a high noise level.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

intercommunication system

A communication system within a building or group of buildings with a microphone for speaking, and a loudspeaker for listening, at each of two or more locations.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The company specialises in aircraft intercommunication systems, wireless communication systems, radars, identification friend or foe products, integrated security systems, air traffic management systems, aerospace electronics, and the performance of threat and radar system analyses.
Telephonics specialises in aircraft intercommunication systems, wireless communications systems, air traffic management systems and aerospace electronics.
Intercommunication Systems -- Microprocessor-based intercom and public address/paging in a semidistributed network connected by a 20-channel digital audio trunk and Ethernet.
Ron Claiborne, the Army's assistant product manager, vehicular intercommunication systems, with the Project Manager, Defense Communications and Army Transmission Systems.
"I get e-mail or phone calls almost every day from Soldiers--and even from parents of Soldiers," said Claiborne, who is the Army's assistant product manager, Vehicular Intercommunication Systems, with the project manager, Defense Communications and Army Transmission Systems, here.
Griffon operates in three segments, namely home and building products, aircraft intercommunication systems, and speciality plastic films.
Improvements include a new data-management system that integrates all sensors to all operators; new UHF, VHF, HF, SATCOM and intercommunication systems; a new acoustic processor; a new GPS navigation system; and a modular radar system that provides surveillance, navigation, weather, and stand-off target-classification modes.
* Communications Systems (vehicular intercommunication systems, UHF SATCOM antennas and radios, and data controllers).