A fax machine is a standard tool in nearly every office. At one time, all fax machines were separate stand-alone devices for sending and receiving images over telephone lines. Now, most computer systems have that capability with the simple addition of a fax/modem board. To send a fax, these devices scan the image of a document converting the light and dark areas into a format that can be sent electroni-cally over standard telephone lines. To receive a fax,these devices reverse the process and print the doc-
ument (or display the document on your monitor)using signals received from the telephone line.