This was extremly difficult to locate so I hope it works and my time was well spent....
Rockwell HCF 56K Data Fax PCI Modem
With twin chipset RHP56D R6789-52 & 11235-14
Used in IBM Conexant modems and in GVC (S)F-1156IV+/R6
Windows 95 & 98 drivers.
Already tried it? Give your review.