Most Cisco APs (like the 2800) operate as "Lightweight Access Points." They are "zero-touch" devices that contain no configuration. When they boot up, they look for a WLC (Wireless LAN Controller). The WLC handles all the logic (SSID creation, security, RF management), and the AP just acts as a radio.
running , specifically version 8.3.150.0 . airap2800k9me831500tar upd
Verify that your other AP models in the network (e.g., 1800 or 3800 series) are also supported by this specific 8.3 version if they are joined to this controller. Feature: Compact Token Parser & Normalizer 1