I installed it and registered with 2talk. However, the fax I sent failed.
I tried to register with VFX and failed.
I then setup an extension and registered with my open VFX asterisk server over a Hamachi VPN. However, using either T.38 or g711 audio fails sending to a VFX virtual fax number. I sent a text fax to my home phone and can hear fax tones so it is sending out.
Also the fax console crashes when I submit a fax ( over Hamachi ) but did not do so when I used 2talk.
I suspect it's not worth the US$71 for a license!