Windows 95/98 driver for modems based on the PcTel PCT688T chipset.
(note: upload facility detected for other windows os's as well)
Typical modem models include the following:
Goldkist HSP 688T
No name brands that have the PcTel HSP 688T chipset.
Unzip to a temp folder, then read the instructions. Use the setup.exe file to install.