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Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1
OL-7104-01
Contents
Cisco CallManager and TFTP Services Are Not Running 9
Creating a New Configuration File 10
Resolving Voice Quality and Roaming Problems 11
Symptom: Cisco Wireless IP Phone Resets Unexpectedly 11
Verifying Access Point Settings 11
Identifying Intermittent Network Outages 12
Verifying DHCP Settings 12
Verifying Voice VLAN Configuration 12
Verifying that the Phones Have Not Been Intentionally Reset 13
Eliminating DNS or Other Connectivity Errors 13
Symptom: The Cisco Wireless IP Phone Has Audio Problems 14
No Audio During a Connected Call 14
One-Way Audio During a Connected Call 14
Symptom: The Cisco Wireless IP Phone Does Not Roam Properly 15
Voice Quality Deteriorates While Roaming 16
Delays in Voice Conversation While Roaming 16
Phone Loses Connection with Cisco CallManager While Roaming 16
General Troubleshooting Information 17
Troubleshooting Tips for the Cisco Wireless IP Phone 7920 17
Logging Information for Troubleshooting 20
Using a System Log Server 20
Using the Trace Route Option on the Cisco Wireless IP Phone 20
Administration Options on the Phone Menus 21
Accessing Hidden Options on the Phone Menus 21
Using Hidden Options on the Phone Menus 22
Erasing the Local Configuration 22
Using Power Save Mode 23
Setting the Softkey Option 23
Performing a Trace Route 24
Selecting the Data Rate 25
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