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Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified Communications Manager Release 7.0
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Chapter 10 Troubleshooting the Cisco Unified Wireless IP Phone 7921G
Resolving Startup and Connectivity Problems
If using static WEP, check the WEP key on the phone to be sure it matches the WEP key on the access
point. Reenter the WEP key on the phone to be sure it is correct.
Note
If open authentication is set, the phone is able to associate to an access point although the WEP
keys are incorrect or mismatched.
Error Messages During Authentication
If you see the following error messages, check these problems:
Authentication failed, No AP found
•
Check if the correct authentication method and related encryption settings are enabled on the access
point.
•
Check that the correct SSID is entered on the phone.
•
Check that the correct username and password are configured when using LEAP, EAP-FAST or
Auto (AKM) authentication.
•
If you are using A WPA Preshared key or WPA2 Preshared Key, check that you have the correct
passphrase configured.
•
You might need to enter the user name on the phone in the domain\username format when
authenticating with a Windows domain.
EAP authentication failed
•
If you are using EAP, you might need to enter the EAP user name on the phone in the
domain\username format when authenticating with a Windows domain.
•
Check that the correct EAP username and password are entered on phone.
AP Error—Cannot support all requested capabilities
On the access point, check that CKIP/CMIC is not enabled for the voice VLAN SSID. The Cisco Unified
Wireless IP Phone 7921G does not support these features.
Symptom: No Registration with Cisco Unified Communications Manager
If a phone proceeds past the first stage (authenticating with access point), and, continues to cycle through
the messages displaying on the phone screen, the phone is not starting up properly. The phone cannot
successfully start up until it connects to the LAN and registers with a Cisco Unified Communications
Manager server.
These sections can assist you in determining the reason that the phone is unable to start up properly:
•
Registering the Phone with Cisco Unified Communications Manager, page 10-4
•
Checking Network Connectivity, page 10-4
•
Verifying TFTP Server Settings, page 10-4
•
Verifying IP Addresses, page 10-5
•
Verifying DNS Settings, page 10-5
•
Verifying Cisco Unified Communications Manager Settings, page 10-5
•
Cisco Communications Manager and TFTP Services are not Running, page 10-6
