as per my past experience that should work.
If the Cisco Wireless IP Phone 8821 or 8821-EX is not able to boot properly, a factory reset can also be initiated via the
following procedure:
•
Turn the phone off by pressing the red button.
•
Press and hold the # key, then power on the phone.
•
Keep the # key held until the LED changes colors.
•
Once the LED changes colors, release the # key.
•
Then press 1 2 3 4 5 6 7 8 9 * 0 #.
•
The Cisco Wireless IP Phone 8821 or 8821-EX will then continue the normal boot process and have the factory settings
restored
To boot the alternate image, perform the following procedure.
•
Turn the phone off by pressing the red button.
•
Press and hold the * key, then power on the phone.
•
Keep the * key held until the LED changes colors.
•
Once the LED changes colors, release the * key.
•
The Cisco Wireless IP Phone 8821 or 8821-EX will then boot using the alternate image for that one time only.
