This is the driver for PCI 56K Winmodem D/F/V/J, with AD1806JS chipset and 3CP3472-OEM-50 number.
I found this driver at 3com oem file direvers. And if you have trien the drivers for 3Com/U.S. Robotics 56K Voice Internal PCI F/M/V/J and they didinīt work try this ones. both modems have the same chipset.