cossie,
With your brother MFC configured EXACTLY as it is, try connecting it DIRECTLY to your RAW telco line (i.e. no filters, dsl modem, other analog devices, Panasonic Answering Machine, etc. attached). Try sending and receiving a fax. If this works, then something is wrong with those filters. If it DOES NOT work, the something is incorrectly configured with your Brother All-in-One MFC.
It's possible that you're having problems with 2 different types of DSL filters. I would test both on limited devices (with ADSL internet running) and isolate the problem (which causes Internet or device failure). I'm hesitant to recommend ANYTHING branded D-Link as I have personally had horrible experiences with this company's products.
Check out the FAQ/Support section for your Brother MFC at:
http://welcome.solutions.brother.com...0cn_all&Cat=12
I know there is a solution to your problem. It's just going to take some step-by-step process of elimination testing to determine where things are going wrong.
- John