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An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [1] Intercoms are generally mounted permanently in ...
Public address system in an old high school. The simplest, smallest PA systems consist of a microphone, an amplifier, and one or more loudspeakers. PA systems of this type, often providing 50 to 200 watts of power, are often used in small venues such as school auditoriums, churches, and coffeehouse stages.
A wireless intercom is a telecommunications device that enables voice communication without the need to run copper wires between intercom stations. A wired intercom system may incorporate wireless elements. There are many types of wireless intercom systems on the market. Most wireless intercom systems communicate by radio waves using one of the ...
The earliest intercom uses date back to the late 1960s and early 1970s, when concerts became too loud to allow for waving pieces of paper or shouting from the stage to the back of the hall.
An intercom telephone is a special kind of telephone that controls an intercom system. Intercom telephones can be found in residential, commercial, and educational settings. [1] For an example, a school is an environment that displays all the capabilities of an intercom telephone. Using an intercom telephone, administrators can make ...
International school. An international school is an institution that promotes education in an international environment or framework. Although there is no uniform definition or criteria, international schools are usually characterized by a multinational student body and staff, multilingual instruction, curricula oriented towards global ...
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