Judging by some of the reviews we read from owners at Epinions and Amazon.com, there are some unhappy fax-machine owners out there, especially some owners of Panasonic and Sharp fax ...
When sending a fax, the document is passed over a sensor that converts the image into digital format. That data then is transmitted over the phone lines to the receiving fax machine, ...
The receiving fax machine "hears" the tones, pieces the grid together, and prints the total compilation of dots. The result is black and white copies of the original pages.