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Contents
viii
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
Network Statistics
8-7
Device Logs
8-8
Streaming Statistics
8-9
C H A P T E R
9
Troubleshooting and Maintenance
9-1
Resolving Startup Problems
9-1
Symptom: The Cisco Unified IP Phone Does Not Go Through its Normal Startup Process
9-2
Symptom: The Cisco Unified IP Phone Does Not Register with Cisco Unified Communications
Manager
9-2
Identifying Error Messages
9-3
Checking Network Connectivity
9-3
Verifying TFTP Server Settings
9-3
Verifying IP Addressing and Routing
9-3
Verifying DNS Settings
9-4
Cisco CallManager and TFTP Services Are Not Running
9-4
Creating a New Configuration File
9-4
Registering the Phone with Cisco Unified Communications Manager
9-5
Symptom: Cisco Unified IP Phone Unable to Obtain IP Address
9-5
Cisco Unified IP Phone Resets Unexpectedly
9-6
Verifying the Physical Connection
9-6
Identifying Intermittent Network Outages
9-6
Verifying DHCP Settings
9-6
Checking Static IP Address Settings
9-7
Verifying the Voice VLAN Configuration
9-7
Verifying that the Phones Have Not Been Intentionally Reset
9-7
Eliminating DNS or Other Connectivity Errors
9-7
Checking Power Connection
9-8
General Troubleshooting Tips
9-8
Resetting or Restoring the Cisco Unified IP Phone
9-10
Performing a Basic Reset
9-10
Performing a Factory Reset
9-11
Monitoring the Voice Quality of Calls
9-11
Troubleshooting Tips
9-12
Where to Go for More Troubleshooting Information
9-12
Cleaning the Cisco Unified IP Phone
9-13
A P P E N D I X
A
Providing Information to Users Via a Website
A-1
How Users Obtain Support for the Cisco Unified IP Phone
A-1