If you are living in the United States of America you can test your fax machine using the National Fire Protection Association’s Fax on Demand service.
Go to: http://www.nfpa.org/itemDetail.asp?categoryID=487&itemID=17976&URL=About%20NFPA/Contact%20Us/Fax%20on%20demand&cookie_test=1 and follow the directions.
I found this to be a very handy feature. Plus you will receive some valuable information regarding fire protection. 