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Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 3.3 or Later
OL-3930-02
Contents
Verifying Cisco CallManager Settings 9-7
Cisco CallManager and TFTP Services Are Not Running 9-8
Creating a New Configuration File 9-9
Resolving Voice Quality and Roaming Problems 9-10
Symptom: Cisco Wireless IP Phone Resets Unexpectedly 9-10
Verifying Access Point Settings 9-10
Identifying Intermittent Network Outages 9-11
Verifying DHCP Settings 9-11
Checking Static IP Address Settings 9-11
Verifying Voice VLAN Configuration 9-11
Verifying that the Phones Have Not Been Intentionally Reset 9-12
Eliminating DNS or Other Connectivity Errors 9-12
Symptom: The Cisco Wireless IP Phone Has Audio Problems 9-13
Symptom: The Cisco Wireless IP Phone Does Not Roam Properly 9-14
General Troubleshooting Information 9-15
Troubleshooting Tips for the Cisco Wireless IP Phone 7920 9-15
Logging Information for Troubleshooting 9-18
Using a System Log Server 9-18
Using the Trace Route Option on the Cisco Wireless IP Phone 9-18
Erasing the Local Configuration 9-19
Administration Options on the Phone Menus 9-20
Accessing Hidden Options on the Phone Menus 9-20
Using Hidden Options on the Phone Menus 9-21
Disabling the Power Save Mode 9-21
Performing a Trace Route 9-22
Selecting the Data Rate 9-22
Selecting the Transmit Power 9-23
Changing the Cisco Discovery Protocol (CDP) Settings 9-23
Troubleshooting Tips for the Cisco 7920 Configuration Utility 9-24
Troubleshooting Information for Basic Problems 9-25