Cisco 6921 - Unified IP Phone Standard VoIP Administration Manual page 8

Contents
Troubleshooting and Maintenance
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C H A P T E R
Providing Information to Users Via a Website
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A P P E N D I X
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
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Network Statistics
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Device Logs
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Streaming Statistics
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Resolving Startup Problems
Symptom: The Cisco Unified IP Phone Does Not Go Through its Normal Startup Process
Symptom: The Cisco Unified IP Phone Does Not Register with Cisco Unified Communications
Manager
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Identifying Error Messages
Checking Network Connectivity
Verifying TFTP Server Settings
Verifying IP Addressing and Routing
Verifying DNS Settings
Cisco CallManager and TFTP Services Are Not Running
Creating a New Configuration File
Registering the Phone with Cisco Unified Communications Manager
Symptom: Cisco Unified IP Phone Unable to Obtain IP Address
Cisco Unified IP Phone Resets Unexpectedly
Verifying the Physical Connection
Identifying Intermittent Network Outages
Verifying DHCP Settings
Checking Static IP Address Settings
Verifying the Voice VLAN Configuration
Verifying that the Phones Have Not Been Intentionally Reset
Eliminating DNS or Other Connectivity Errors
Checking Power Connection
General Troubleshooting Tips
Resetting or Restoring the Cisco Unified IP Phone
Performing a Basic Reset
Performing a Factory Reset
Monitoring the Voice Quality of Calls
Troubleshooting Tips
Where to Go for More Troubleshooting Information
Cleaning the Cisco Unified IP Phone
How Users Obtain Support for the Cisco Unified IP Phone
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