Driver retreived from Gateways website for a 3com / USRobotics 56k win modem model 0613 which is a 56k ISA Modem. Driver extracts from zip file to a cab folder, from device manager re-install driver and point to the folder. Good luck.
The following files are found inside the driver download file.
|cabs/7502806/README.TXT||3.2 KB||4 Feb 2002|
|cabs/7502806/WINMODEM.DR_||7.9 KB||20 May 1998|
|cabs/7502806/TURBOVBF.VX_||3.9 KB||17 Sep 1997|
|cabs/7502806/TURBOVCD.VX_||9.4 KB||17 Sep 1997|
|cabs/7502806/WMWAVE.INF||1.2 KB||5 May 1998|
|cabs/7502806/WMLDR.VX_||3.1 KB||20 May 1998|
|cabs/7502806/WMEXE.EX_||25.2 KB||20 May 1998|
|cabs/7502806/WMDLL.DL_||21.5 KB||20 May 1998|
|cabs/7502806/WMINSTAL.DLL||125.3 KB||20 May 1998|
|cabs/7502806/WINMODEM.INF||58.8 KB||16 May 1998|
|cabs/7502806/WINMODEM.VX_||371.2 KB||20 May 1998|
|cabs/7502806/WMPASS.DL_||52.0 KB||20 May 1998|