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  2. Clear-Com - Wikipedia

    en.wikipedia.org/wiki/Clear-Com

    [1] [2] The National Academy of Television Arts & Sciences honored the company with a Technology and Engineering Emmy Award in 2010. [ 3 ] Clear-Com was founded in San Francisco, California , on April 18, 1968, by audio engineer Charlie Butten and his business partner Bob Cohen, a sound company owner who had recently been part of Family Dog ...

  3. Two-way communication - Wikipedia

    en.wikipedia.org/wiki/Two-way_communication

    Two-way communication is a form of transmission in which both parties involved transmit information. Two-way communication has also been referred to as interpersonal communication. Common forms of two-way communication are: Amateur radio, CB or FRS radio contacts. Chatrooms and instant messaging. Computer networks. See backchannel. In-person ...

  4. 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]

  5. Riedel Communications - Wikipedia

    en.wikipedia.org/wiki/Riedel_Communications

    Riedel acquires DELEC Audio- und Videotechnik GmbH, a developer and manufacturer of digital intercom and communication systems. Riedel contributes to the Games more than 14.000 radios and 20.000 in-ear monitors as well as numerous MediorNet frames.

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  7. Wireless intercom - Wikipedia

    en.wikipedia.org/wiki/Wireless_intercom

    There are many types of wireless intercom systems on the market. Most wireless intercom systems communicate by radio waves using one of the frequencies allotted by various government agencies. Some wireless intercom systems communicate using the 802.11 standard. [1] There are also systems that advertise themselves as wireless, but communicate ...

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  9. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    HS 31 (new developed register system, introduced in 1931, based on a new flat type relay and a 100-point two-motion selector, suitable for small and large exchanges) HS 52 (new developed register system, introduced in 1953, based on a new 120-point selector, which was in fact a 4 x 30-point uniselector with 2 x 4 brushes offset by 180°, no ...

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