I have no problems with Lucent pci modem with mars chipset on my 64bit machines, like FC6, F7, Debian Testing, Mandriva 2007, Mandriva 2007.1 using martian driver kit from linmodems. Conexant pci modems apparently have 64bit Linux support also. I was under the impression the Lucent mars was the only one that could run on 64bit Linux for a pci modem, but I'm pretty sure I seen 64bit source at linuxant.com. And Conexant has great support but will cost money to get full speed, only 1.4kbps till you fork out the cash. I have no problems with ESS and PCTel pci modems in 32bit Linux, also Intel 537EP for 32bit but that one can be a bitch some times (but the best speed).
When I was running FC6, I tried helping others here to get their various USB modems to work with FC6. Never seen a success story though, if they did finally succeed, they didn't inform the community. Apparently FC6 is an a..hole with USB modems. Haven't heard any of those sort of issues with Fedora 7 yet, but lot's with Fedora Core 6. And I feel F7 is a great improvement over FC6, won't be long FC6 will not be supported anymore.
The linmodems project is more focused on pci modems, as normally, serial and USB (also serial) modems do not normally require proprietary drivers.
Last edited by Junior Hacker; 07-10-2007 at 10:39 PM.