I've checked out the slmodem-2.9.10 driver and Linuxant HSF driver with no success. This is a relatively new model (at time of writing), so not sure if it is yet supported. Under Windows XP, reported as ThinkPad modem (with some references to Conexant). 'lspci' listing did not reveal any modem hardware. Anyone got any clues???

UPDATE: The Linuxant HSF modem driver (http://www.linuxant.com/drivers/hsf/full/downloads.php) works fine once configured properly.

In case this is useful to anyone else, select the most appropriate package from the list. Just a matter of installing with rpm -i hsfmodem-{version}.{arch}.rpm

Then run hsfconfig and one restart later you should be in business. lsmod will confirm that 'hsfhda' and 'hsfserial' modules are loaded, and ls -l /dev/modem should reveal the link '/dev/modem -> ttySHSF0' has been created.