The fax server that we were using had crashed and is no longer being supported.
You can send your faxes by email. Save what you want to fax as a .pdf file. Then start a new email and attach the .pdf file to the email. In the to field use [faxnumber]@directfax.net.
You need to add a 1 and use the area code with the full number.
You should receive a confirmation email if it is sent correctly. Anything you send in the body will also be sent along with the message.