Thanks guys. But:

"Built-in USB and parallel interfaces‡ Your investment is protected because we’ve built in both USB and parallel interfaces that enable this model to serve as a laser printer (up to 15ppm) if your needs grow beyond basic fax and copying."

http://www.brother-usa.com/Fax/modeldetail.aspx?PRODUCTID=FAX4100e&tab=spec

It has no PC/Fax capability. THe USB connection is only to use the laser printer.