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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
CHAPTER
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
APPENDIX
A Providing Information to Users Via a Website A-1
How Users Obtain Support for the Cisco Unified IP Phone A-1