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Electromagnetic telephones, mechanical acoustic devices used to transmit speech and music over a distance.
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Line of stations which was used to convey textual information by means of visual signals.
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Visual signal device for optical communication which is using morse code. The signals are made from opening and closing shutters in front of the lamp.
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A device which is used to transfer sound through long distance. Telephone converts voices and sounds into electronic signals which are transmitted using cables.
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Acoustic phonograph records and reproduces the sound . It is also known as the gramophone, it records the sound vibrations.
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Television is a telecommunication medium used to transmit moving images in monochrome or in color with sound.
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A telecommunication network that allows computers to connect and share information and resources.
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A portable telephone which allows people to communicate between each other on a distance and without using any cables. A wireless and pocket device.
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A global system of interconnected computers that uses internet protocol suite. Internet is a global network that allows computers to connect and share information.
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A system that connects phones and telephones using radio and satellite signals.