how to configure modem in Linux

I have Linux RedHat7.1 and I have this modem
RockWell HCF 56KDATA Fax PCI Modem.
I don't know how to configure this modem. Can anybody please help me out.
I tried "linuxconf" it does not recognize this command. Pleas help me out.

Regards

-Iftikhar

http://www.ibiblio.org/pub/Linux/docs/HOWTO/Modem-HOWTO