Well, unfortunately for thewinky and all the other linux users who AREN'T using RedHat 6.1, this driver probably won't work as well as a modem should. It's a binary module, so it will work best with the exact kernel it was compiled for (2.2.12-20). Anyone who upgrades past 2.2.14, without patching their kernel first will have problems. (pppd will crash, kernel panic, etc.). Any other kernel version, results are not guaranteed and can result in decreased stability and YMMV (your mileage may vary). It is not recommended to use modules from mixed kernel versions (i.e. 2.2.18, but 2.2.14 ppp.o and 2.2.12-20 modem driver) [See Alan Cox's post on the kernel-traffic mailing list. Msg me for the exact URL] If this module includes code from the GPL'd serial driver (as the Lucent one is), this binary module is ILLEGAL, since the source is not available.
Basically, for Linux, get a hardware modem. If you MUST get a winmodem (financial reasons, built into hardware, etc.) I would recommend one based on the Lucent chipset as theirs is a partially binary-only, partially source based driver that will compile in the 2.2.x series with much less headaches. (not 2.4.0 though)