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Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 3.3 or Later
OL-3930-02
Chapter 9 Troubleshooting the Cisco Wireless IP Phone 7920
Resolving Startup and Connectivity Problems
• If you are using the battery, try plugging in the external power supply
instead.
If, after attempting these solutions, the phone still does not start up, contact a
Cisco technical support representative for additional assistance.
Symptom: The Cisco Wireless IP Phone Does Not Associate with
a Cisco Aironet Access Point
After the Greeting Message displays, if a phone continues to cycle through
messages displaying on the LCD screen, the phone is not associating with the AP
properly. The phone cannot successfully start up unless it is associates and
authenticates with an AP.
Verifying Access Point Settings
The Cisco Wireless IP Phone 7920 must first authenticate and associate with an
access point before it can obtain an IP address. The phone follows this start up
process with the AP:
• Scans for an AP
• Authenticates using either LEAP or WEP
• Obtains an IP address
Check the SSID settings on the AP and on the phone to be sure the SSID matches.
Check the authentication type settings on the AP and on the phone to be sure
authentication/encryption settings match.
If using static WEP, check the WEP key on the and phone to be sure it matches
the WEP key on the AP. Reenter the WEP key on the phone to be sure it is correct.
Error Messages During Authentication
If you see the following error messages, check the follow problems:
Authentication failed, No AP found
• Check if CCKM and ciphers are enabled on the AP. These features are not
supported.