Owner`s manual

Software/Driver Installation (Windows NT)
16 MultiModemISI Hybrid Series, ISIHI-2S/2U
7. The Install New Modem dialog box appears. Select the ports that
correspond to the first four ports of the ISIHI-2S/2U card. Any ports
that existed prior to installing the ISIHI-2S/2U appear first in the list of
available COM ports. Click Next. The terminal adapters (screen
displays modems) install to the selected COM ports.
8. After the terminal adapters install, click Finish to return to the General
tab to view COM port assignments (and make changes if necessary).
Now you are ready to install the modems.