44206906-D Rev 00 4.2About the Passport Null Modem DriverInstall Tool provides a “null modem” driver to support a direct connectionbetween a workstation serial port and the Passport 4400 management port. Thismodem driver is copied to your workstation when you install Install Tool.Locating the Null Modem DriverThe Install Tool installation process copies the null modem driver to yourInstall Tool installation directory. (The name of the modem driver isPP4400Direct. The file name is PassportNullModem.inf.)If You Are Using a Dial-Up Modem ConnectionYou do not need to install the null modem driver if your workstation is using amodem (versus a serial cable) to connect to the Passport 4400. In this case, use thedriver provided with your modem.Required Software ComponentsYour workstation needs the following software components to support an IPconnection between one of its serial ports and the Passport 4400 managementport:Note: If you uninstall the null modem driver and subsequently reinstallInstall Tool, the installation process does not reinstall the driver. Referto “Null Modem Driver Troubleshooting Tip” on page 36 for adescription of and recommended solution to the problem.Software Component: Description:TCP/IP TCP/IP protocol support is needed to support a serialline IP connection between the workstation and thePassport 4400.
