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What Is ISDN?
ISDN, which stands for integrated services digital network, is a system of
digitizing phone networks which has been in the works for over a decade. This
system allows audio, video, and text data to be transmitted simultaneously
across the world using end-to-end digital connectivity.
The original telephone system used analog signals to transmit a signal across
telephone wires. The voice was carried by modulating an electric current with a
waveform from a microphone. The receiving end would then vibrate a speaker coil
for the sound to travel back to the ear through the air. Most telephones today
still use this method. Computers, ....
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