http://www.mbsi.ca/cnxtlindrv/riptide/
Works with my Redhat 7.3
"hcfpciconfig " to set up the modem
"ripconfig" to set up the sound.
After that setup the Internet Connections and point it to the "dev/modem"
I used the hcf_riptide_v92.inf that was in the list of about 4 to choose from. ,for the modem .