Microsoft Exchange Server 4.0, 5.0 or 5.5 installed
Windows NT server with at least 64 MB memory and a 133 MHz
Pentium processor
One of the following fax devices: class 2 fax modem (preferably
not a USR Sportster Flash), Brooktrout fax board (contact GFI for
drivers), ISDN CAPI 2.0 card (EICON DIVA Pro, EICON Server Bri or AVM B1)