When I give an appropriate command to my HP Fax machine for faxing, my Fax machine displays hp Fax test failure error. When I try to send Fax through my HP Fax machine, I am facing Fax failure error message. My HP Fax machine fails to send the documents to another number, so it has become a critical problem for me. I am trying to find out the exact reasons of this error, but I am not able to guess the main reasons. I am applying my technical skills to sort out this technical issue, but no results. So anyone can recommend the solid ways to resolve this technical problem.