Okay kiddo, have you ever drawn a picture and then sent it to your friend using a fax machine? Well, a fax demodulator is a special machine that receives pictures or documents that have been sent over the telephone lines through a fax machine.
But how does it work, you ask? Let's imagine that you drew a picture and want to send it to your friend via a fax machine. First, the picture is sent through the telephone line as sound waves, which can travel through the cable lines.
Now, a fax demodulator will listen carefully to these sound waves and convert them back into the picture you drew. It does this by separating the sounds into tiny parts and then organizing them back into the image you sent.
It's like taking apart a puzzle and putting it back together again, but really, really fast! And that's how a fax demodulator works, making sure you get the picture or document that was sent to you through a fax machine. Cool, huh?