Check to make sure that the correct receive mode is being used. If you will be using the printer on a phone line that also receives voice calls, the unit will need to be in Tel Priority mode. For details, visit THIS LINK.
If you continue to have difficulties, find more help at Contact Us.
I have read through all the set up and tried differnt settings. I think the problem is that my TAD is in another room. Ihave "Parallel" phones conected. The manual says I would have to resieve a fax manually. I havent figured that out yet. I was ready to buy another Brother (the old one worked on the same setup). Out of frustration I have given up for a bit. As for finding help at "Contact Us" or support it is just as frustrating.