Multi-Tech Systems ISIHP-2S - Manual (Page 18)

Software/Driver Installation (Windows NT)
18 MultiModemISI Hybrid Series, ISIHP-2S/2U
5. The Install From Disk dialog box appears. Click OK (diskette
should still be in drive).
6. The Install New Modem dialog box appears. From the Models
list, select an ISDN protocol (; Auto-Protocol, ML-PPP, PPP,
V.120, or X.75, depending on your application). Then click Next.