are you talking about the linux fax program by Ed Casas called efax?
i've got a system now working with efax, php, & mysql. works fine. with 256megs of ram a 850mhz athlon system can keep up with the 16 modems i've got.
the system takes php scripts eval() it to get html, sends it through html2ps then uses ghostscript to create a tiff g3 file. efax sends the files out. so now i can send faxes by using a bit of html & php.