Cisco 7800 Series Administration Manual page 12

Contents
C H A P T E R 1 2
C H A P T E R 1 3
Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide
xii
Troubleshooting 169
General Troubleshooting Information
Startup Problems
171
Cisco IP Phone Does Not Go Through the Normal Startup Process
Phone Displays Error Messages
Phone Cannot Connect to TFTP Server
Phone Cannot Connect to Server
Configuration File Corruption
Cisco IP Phone Cannot Obtain IP Address
Cisco IP Phone Reset Problems
Phone Resets Due to Intermittent Network Outages
Phone Resets Due to DHCP Setting Errors
Phone Resets Due to Incorrect Static IP Address
Phone Resets During Heavy Network Usage
Phone Does Not Power Up
Phone Cannot Connect to LAN
Audio Problems
175
No Speech Path
Choppy Speech
General Telephone Call Problems
Phone Call Cannot Be Established
Phone Does Not Recognize DTMF Digits or Digits Are Delayed
Troubleshooting Procedures
Check DHCP Settings
Verify DNS Settings
Additional Troubleshooting Information
Maintenance 179
Basic Reset 179
Perform Factory Reset Phone Keypad
Perform Factory Reset from Phone Menu
Voice Quality Monitoring
Voice Quality Troubleshooting Tips
Cisco IP Phone Cleaning
169
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179
180
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176