If you want to use your Brother Fax4100E to send or receive faxes on a standard analog telephone line, you must directly connect a telephone cord from the jack labeled LINE on the machine to the wall telephone jack.
I print from my brother and telefax on a regular basis all you have to do is plug in your cord your USB print cord in the back of the fax machine and it will work just like a printer
The Brother Fax4100E must connect directly to a telephone cord from the jack labeled LINE on the Brother machine to the wall telephone jack to send faxes.