Specifications

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Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Chapter 9 Troubleshooting the Cisco Unified Wireless IP Phone 7921G
Resolving Startup and Connectivity Problems
• The phone goes into recovery mode and checks the integrity of the
firmware files.
• If error messages display indicating “recovery required,” then plug the
USB cable into the phone and a PC. See
“Using the USB Connection for
Initial Phone Configuration” section on page 4-2.
• Using a browser, access the web page for the phone. See “Accessing the
Phone Web Page” section on page 4-5 for instructions.
• Go to the Phone Recovery section on the web page and upload a new
Phone Software TAR file.
If, after attempting these solutions, the phone still does not start up, contact a
Cisco technical support representative for additional assistance.
Symptom: The 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 phone screen, the phone is not associating with the
access point properly. The phone cannot successfully start up unless it associates
and authenticates with an access point.
Verifying Access Point Settings
The Cisco Unified Wireless IP Phone 7921G 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 access point:
1. Scans for an access point
2. Associates with an access point
3. Authenticates using a preconfigured authentication method (if configured,
can use LEAP, EAP-FAST, Auto (AKM), or others)
4. Obtains an IP address
Check the SSID settings on the access point and on the phone to be sure the SSID
matches.
Check the authentication type settings on the access point and on the phone to be
sure authentication/encryption settings match.