The word modem is actually a shorted version of the original words: modular demodulator and was originally designed to send digital data (information) over a telephone line. During those days, the data was converted to analog, sent over the telephone line, then reconverted back to a digital format by hardware on the receiving end. For those that may remember the old/original computer modems as well as fax modems, they used a land-line phone line connection, with notoriously slow connection speeds Today’s wireless modems send digital data via radio signals.
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