What is Air-AP2800-K9-ME-8-3-133-0.tar?
TFTP Timeout: Ensure your firewall allows port 69 and that the TFTP server is reachable from the AP's management IP.
To download the specific firmware image AIR-AP2800-K9-ME-8-3-133-0.tar
The file AIR-AP2800-K9-ME-8-3-133-0.tar is a Cisco software image used to convert a CAPWAP (Controller-based) Access Point to a Mobility Express (ME) Access Point. This specific version (8.3.133.0) allows the AP to act as its own wireless controller. Download and Source
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