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  2. NuTone - Wikipedia

    en.wikipedia.org/wiki/NuTone

    NuTone became a publicly traded company in 1955. Other NuTone-created products included the residential kitchen ventilator hood and built-in kitchen countertop appliances. In 1967, when the Corbetts sold their interest in the company to the Scovill Manufacturing Company, [2] NuTone was the largest American producer of home electrical products.

  3. Voice-operated switch - Wikipedia

    en.wikipedia.org/wiki/Voice-operated_switch

    Intercom systems that use a speaker in a room as both a speaker and a microphone will often use VOX on the main console to switch the audio direction during a conversation. The circuit usually includes a delay between the sound stopping and switching direction, to avoid the circuit turning off during short pauses in speech.

  4. Communications system - Wikipedia

    en.wikipedia.org/wiki/Communications_system

    An optical communication system is any form of communications system that uses light as the transmission medium. Equipment consists of a transmitter, which encodes a message into an optical signal, a communication channel, which carries the signal to its destination, and a receiver, which reproduces the message from the received optical signal.

  5. 1A2 Key Telephone System - Wikipedia

    en.wikipedia.org/wiki/1A2_Key_Telephone_System

    The most commonly used telephone sets for the 1A2 systems were modifications of the Bell System standard 500-series telephones for rotary dial systems, and the 2500-series Touch-Tone desk sets. For key system operation these sets were equipped with a set of push-buttons ( keys ) and additional internal contact springs to control the additional ...

  6. Israeli military kills four doctors in raid on Kamal Adwan ...

    www.aol.com/israeli-military-kills-four-doctors...

    Four doctors were killed at the Kamal Adwan Hospital in besieged northern Gaza on Friday, after Israeli forces stormed the compound, killing and injuring dozens of people in areas surrounding the ...

  7. Intercom telephone - Wikipedia

    en.wikipedia.org/wiki/Intercom_telephone

    For an example, a school is an environment that displays all the capabilities of an intercom telephone. Using an intercom telephone, administrators can make announcements over loudspeakers that are heard by the entire building, but they can also call a specific classroom 's intercom by dialing the room number of that classroom.