Multi-Tech Systems ISIHP-2S - Manual (Page 39)

Software/Driver Installation
MultiModemISI Hybrid Series, ISIHP-2S/2U 39
6. The Install New Modem dialog box appears. Select the
numbered port (the fourth highest number) of the ISIHP-2S/2U
card. Click Next. The modem installs to the COM port.
7. After the modem installs to the port, click Finish.