ORiNOCO AP-2000 Troubleshooting Manual page 31

If a TFTP server is not configured and running, you will not be able to
download and upload images and configuration files to/from the AP-2000.
Remember that the TFTP server does not have to be local, so long as you
have a valid TFTP IP Address. TFTP does not have to be running for
AP-2000 operations that do not transfer files.
After the TFTP server is installed:
Check to see that TFTP is configured to point to the directory containing
the AP Image.
Ensure you have the proper TFTP server IP Address, the proper
AP Image file name, and that the TFTP server is connected.
Ensure the TFTP server is configured to both send and receive, with no
timeout.
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