It's probably a WinModem and you might need to find a kernel driver module for
it.

http://www.linmodems.org/

DARREN BROWN wrote:
> 
> Installed RH 7.3.  Now there is no modem found when scanning during the
> configuration setup under Gnome.  The modem is a HSP56 PCI card.  Any ideas on
> this?
> 
> Regards,
> Fuman