You need to use a fax program installed on your computer and the computer's modem. XP has a fax program but it isn't installed by default. To install it go to add/remove programs in the control panel, windows components and put a check mark in the fax box. Click on OK or next and it should install it for you. Here is some additional information about your all-in-one:
I have a Dell Notebook 1000 and a Dell all in one 942 printer. I also have DSL Broadband with Verizon. I cannot get the fax to work. I get an error no dial tone, THe phone line is in us or sometimes oan error occured whild receiving the fax.