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  2. Tone remote - Wikipedia

    en.wikipedia.org/wiki/Tone_remote

    A Tone remote, also known as an EIA Tone remote, is a signaling system used to operate a two-way radio base station by some form of remote control. [1] [2] [3] A tone remote may be a stand-alone desktop device in a telephone housing with a speaker where the dial would have been located. It may look like a desk top base station.

  3. No. 4 Electronic Switching System - Wikipedia

    en.wikipedia.org/wiki/No._4_Electronic_Switching...

    The processor includes a central control, call stores, and program stores. In addition it had access to additional units through the auxiliary unit bus (AUB) and peripheral unit bus (PUB). A master control console (MCC) provides office technicians access to the switch through the processor peripheral interface (PPI). [2]

  4. Infinite switch - Wikipedia

    en.wikipedia.org/wiki/Infinite_switch

    Energy regulator of an electric stove with a glass-ceramic hob. 1: Electric contacts (here closed); 2: Bimetal; 3: Heater for Bimetal. An infinite switch, simmerstat, energy regulator or infinite controller is a type of switch that allows variable power output of a heating element of an electric stove. It is called "infinite" because its ...

  5. KVM switch - Wikipedia

    en.wikipedia.org/wiki/KVM_switch

    Local remote KVM extender design allows users to control computer equipment up to 1,000 feet (300 m) away from the user consoles (keyboard, monitor and mouse). They require a direct cable connection from the computer to the KVM extender to the console [ 10 ] and include support for standard category 5 cabling between computers and users ...

  6. Time switch - Wikipedia

    en.wikipedia.org/wiki/Time_switch

    A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners."

  7. Float switch - Wikipedia

    en.wikipedia.org/wiki/Float_switch

    A pedestal sump pump with a float switch. A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float.