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2.2 | WAN Devices |
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2.2.3 | Describe modems on a WAN |
A modem is a device that
interprets digital and analog signals by modulating and demodulating
the signal, enabling data to be transmitted over voice-grade
telephone lines. At the source, digital signals are converted to a
form suitable for transmission over analog communication facilities.
At the destination, these analog signals are returned to their
digital form. The Figure illustrates a simple modem-to-modem connection
through a WAN.
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