Appendix A. Troubleshooting

USB SINGLE-PORT HUB (RS-422/485)

A.1 Before Calling Technical Support

Serial Utility test software is supplied with the USB Single-Port Hub (RS-422/485) and will be used in the troubleshooting procedures. Using this software and following these simple steps, most common problems can be eliminated without calling Technical Support.

1.If your adapter isn’t working, first check to make sure that USB support is enabled in the system BIOS and it is functioning properly in the operating system. This can be done by using either the Windows 98, Me, or Windows 2000 Device Manager.

2.Make sure that the systems software has been installed on the machine so that the necessary files are in place to complete the installation.

3.When the USB Single-Port Hub (RS-422/485) is configured properly, the USB Enabled LED (EN) will be lit. This should allow you to use the WinSSD utility and the supplied loopback plug to check communications. The supplied loopback plug connects TX to RX. If you decide to test the