It would look like this is a software modem (one implemented partly in hardware and partly through a software driver).
It can be a real pain getting these to work under Linux; see
http://linmodems.org for more information.
But I think you are in luck, as at least one site reports that this should work with the ltmodem driver. If you don't have that on the Fedora install disks, then take a look at
http://www.rpmfind.net and try and find an RPM. If not, you can get it from
http://www.physcip.uni-stuttgart.de/heby/ltmodem/