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How the Telephone Works  
JUST THE FACTS ListAfterList List

Tags: telephone, invention, bell, how, works, explanation

This is how the telephone works. The telephone is actually a relatively simple device. It consists of less than ten parts that work together to allow sending and receiving calls through a large, complex network.

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  • Microphone: This is a simple microphone that allows you to transmit your voice across the phone network.
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  • Speaker: This is what allows you to hear the person on the other line.
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  • Duplex coil: This part makes sure that the sounds transmitted through the microphone don't reach the speaker.
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  • Hook Switch: This is a switch that alternates between the telephone being connected and disconnected from the network. Multiple taps of this switch allow calls to different lines. For example, rapidly tapping the hook switch 8 times would be the equivalent of pressing 8.
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  • Ringer: This device lets you know when you are receiving a call.
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  • Wall jack/Phone line: This allows the phone to be connected to the network.

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