Win NT 4.0 driver for the Aztech MSP-5900-U Modem
Installation Driver for Win NT 4.0 (Driver Version 7.66-9k-01 for US only)
Filesize 920 kb.
Win9x & Win 2K drivers also available here....
Unzip to a floppy or temporary folder, remove all existing modem drivers,
run setup.exe program from installation files.