Communications
Revolution 		Communications
Networks 		Optical
Fibres 		Photonic
Devices 		Future of
Communications 		Credits

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I/O Devices
The first key elements of a network are the terminal devices; they are required for information input and/or output.

These devices are also called I/O devices.
orange phone
The telephone handset for instance is both an input and output device.
A printer is an output device.
A microphone is an input device.
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