From the Cisco Aironet 1200 Series Access Point Hardware Installation Guide page 6-9
Follow the steps below to reload the access point image file:
The PC you intend to use must be configured with a static IP address in the same subnet as the access
Place a copy of the access point image file (such as c1200-k9w7-tar.123-8.JA.tar) into the TFTP server
folder on your PC. For additional information, refer to the “Obtaining the Access Point Image File” and
“Obtaining the TFTP Server Software” sections.
Rename the access point image file in the TFTP server folder to c1200-k9w7-tar.default.
Activate the TFTP server.
Connect the PC to the access point power injector using a Category 5 (CAT5) Ethernet cable.
Disconnect power (the power jack for external power or the Ethernet cable for in-line power) from the
Press and hold the MODE button while you reconnect power to the access point.
Hold the MODE button until the status LED turns red (approximately 20 to 30 seconds), and release the
Wait until the access point reboots as indicated by all LEDs turning green followed by the status LED
After the access point reboots, you must reconfigure the access point by using the Web interface, the Telnet interface, or Cisco IOS commands.