another microprocessor then converts the binary data into digital information, which allows more data to be stored on the microchip. But, because most telephone systems cannot read digital information, this is again changed, via another microprocessor (modem), into analogue tones, or pitches of noise. The first machine transmits these tones to the second. The receiving machine converts the analogue tones back into digital and then binary information. It sends a signal (in binary code) to the thermal head, or printer. This turns heated elements on or off according to the pattern of 0s and 1s contained in the signal. The pattern of black and white is then printed on to the heat sensitive paper.Fax machine sends information at the rate of 9,600 baud, or bits of information per second. A few seconds' interference on the phone line can make several lines of a document illegible. If the line is noisy, the sending machine will slow down to reduce the amount of information lost
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