Back in the day many of my clients had Windows NT/2000 machines running RAS or RRAS with multi-port serial cards connected to modems for employee remote access.

Back in the day many of my clients had Windows NT/2000 machines running RAS or RRAS with multi-port serial cards connected to modems for employee remote access. Usually these would be 8 or 16 serial ports per card with multiple cards installed per server.