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Troubleshooting
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Port unavailable
If the installation of the USB Serial Adapter has been completed
but the port is unavailable to applications, follow the
instructions below to diagnose the problem:
1. Check the LEDs on the USB Serial Adapter.
• If the red light is on steady, skip to the next section.
• If there are no lights on, check to make sure the
device has been properly plugged in.
• If the center, green LED is blinking steadily, the
device has not been configured properly. This can
happen if the wrong drivers have been installed for
your operating system. If the wrong drivers have
been installed or if you are not sure, follow the
instructions in section 3.3, Uninstalling the USB Serial
Adapter Drivers, and reinstall the software.
2. Check to make sure no other applications are using the
COM port.
3. If you have enabled DOS Box support, make sure that
no other applications are using the Windows
®
name
for the COM port or the DOS name for the COM port
(see section 4.4, Using the USB Serial Adapter with
DOS Applications).
Communications Garbled
If you are using the USB Serial Adapter to communicate
between two computers over a serial cable, make sure that the
communications settings are the same on each computer. For
instance, if one computer is set up for 9600-baud, 8 data bits,