A black fax is a prank fax transmission whose pages are entirely filled with a uniform black tone, so as to waste the ink of the recipient.

Its very unusual for a total black fax sheet to be a coincidence or error. It usually is a black fax attack. This should explain it to you, http://en.wikipedia.org/wiki/Black_fax

Either the scanner at the sending fax is broken (and sending all "black" as the data, someone is using a dark coloured piece of paper that is being picked up as all black, or a "black fax" disabling attack is being used.

Brother is one of the leading manufacturers in fax machines. There are several different types of fax machines including Black & White Laser, Color Laser, and Color Inkjet.

Brother is one of the leading manufacturers in fax machines. There are several different types of fax machines including Black & White Laser, Color Laser, and Color Inkjet.