The device that converts outgoing data into audible tones is called a
modem .
Modem stands for Modulator-Demodulator . Sådan fungerer det:
* Modulation: Modemet tager digitale data (som tekst, billeder eller lyd) og konverterer dem til analoge signaler (lydbølger), der kan rejse over telefonlinjer eller andre analoge kanaler.
* demodulation: At the receiving end, another modem demodulates the signal, converting the analog tones back into digital data.
Kortfattet:
* Outgoing data (digital) is modulated by the modem into audible tones (analog).
* Incoming tones (analog) are demodulated by the modem back into digital data .
