Drivers for 3Com PCMCIA "combo" network/modem cards

Noise asks: "It's not easy to find information on drivers for network cards or modems. I installed Linux on a notebook (works great!), but have not been able to find the drivers for my PCMCIA "combo" card. In particular, I am using Red Hat 6.0 and have a 3Com 10/100+56k modem card (model 3CCFEM556B). Where can I find drivers for these types of cards? "