Comtrol RocketPort USB Serial or Modem Hub Driver Installation with Windows 2000 - Manual (Page 13)

Installing Modems on the Serial Ports 13
8. To add more modems, click the Add button and repeat Steps 4 through 7.
9. Optionally:
a. To configure port speed, data bits, parity, and so on, select a modem and click the Properties button.
b. To query and test the modem, select a modem. Click the Properties button. Select the Diagnostics tab,
and click the Query Modem button.
10. When you are done, click the OK button to exit the Modem Properties screen. Your changes take effect
immediately. No reboot is required.