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  2. Intercom - Wikipedia

    en.wikipedia.org/wiki/Intercom

    1980s MirTone intercom system. 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]

  3. Intercom, Inc. - Wikipedia

    en.wikipedia.org/wiki/Intercom,_Inc.

    Intercom, Inc. is a software company that specializes in business messaging, providing businesses with a way to chat with their customers. [3] Intercom has its headquarters in San Francisco with offices in Chicago , Dublin , Sydney and London .

  4. Wireless intercom - Wikipedia

    en.wikipedia.org/wiki/Wireless_intercom

    Outdoor Intercom - This is an intercom that can be placed by a building's doors and it operates like a doorbell, but people inside can talk to the visitor. Channels - Some wireless intercom systems have more than one channel so private conversations can occur between groups of intercoms.

  5. Intercom telephone - Wikipedia

    en.wikipedia.org/wiki/Intercom_telephone

    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. Intercom telephones can be found in residential, commercial, and educational settings.

  6. Video door-phone - Wikipedia

    en.wikipedia.org/wiki/Video_door-phone

    video door phone. A video door-phone (also known as a video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building (residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside.

  7. NuTone - Wikipedia

    en.wikipedia.org/wiki/NuTone

    NuTone is an American company that manufactures products mainly for residential use, including doorbells, intercom systems, indoor air quality products, ventilation systems, range hoods, ceiling fans, built-in electric heaters, ironing equipment, and home theater systems. The company was founded in 1936 by J. Ralph Corbett in Cincinnati, Ohio. [1]

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