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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
OL-11524-01
Contents
CHAPTER
9Troubleshooting and Maintenance 9-1
Resolving Startup Problems 9-2
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
UnifiedCallMan ager 9-3
Identifying Error Messages 9-4
Checking Network Connectivity 9-4
Verifying TFTP Server Settings 9-4
Verifying IP Addressing and Routing 9-5
Verifying DNS Settings 9-6
Verifying Cisco UnifiedCallManager Settings 9-6
Cisco Unified CallManager and TFTP Services Are Not Running 9-6
Creating a New Configuration File 9-7
Registering the Phone with Cisco Unified CallManager 9-8
Symptom: Cisco Unified IP Phone Unable to Obtain IP Address 9-8
Cisco Unified IP Phone Resets Unexpectedly 9-9
Verifying Physical Connection 9-9
Identifying Intermittent Network Outages 9-9
Verifying DHCP Settings 9-10
Checking Static IP Address Settings 9-10
Verifying Voice VLAN Configuration 9-10
Verifying that the Phones Have Not Been Intentionally Reset 9-11
Eliminating DNS or Other Connectivity Errors 9-11
Checking Power Connection 9-12
Troubleshooting Cisco Unified IP Phone Security 9-12
General Troubleshooting Tips 9-15
Resetting or Restoring the Cisco Unified IP Phone 9-17
Performing a Basic Reset 9-18
Performing a Factory Reset 9-19