I have a PC-based DSO that connects via parallel port that I'd like to get working via USB (preferable) or at least ExpressCard. I picked up a USB-parallel adapter from MicroCenter thinking it would ...

Yes, it's unlikely that a modem would require more bandwidth than the ISA bus provides. Also, most PCI modems are Winmodems which rely on the CPU to do most of their work, so ISA modems are usually ...