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محطم يعمل howstuffs. Hos Stuff Works الطاحن HowStuffWorks Most of us are familiar with a normal business or residential line from the phone company A normal phone line like this is delivered on a pair of copper wires that transmit your voice as an analog signalWhen you use a normal modem on a line like this, it can transmit data at perhaps 30 kilobits per second (30,000 bits per ...