Cisco Systems 7906G, 7911G

Contents

Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager

OL-10008-01

Symptom: The Cisco Unified IP Phone Does Not Register with

CiscoUn ified CallManager 9-3

Identifying Error Messages 9-4

Registering the Phone with Cisco Unified CallManager 9-4

Checking Network Connectivity 9-4

Verifying TFTP Server Settings 9-5

Verifying IP Addressing and Routing 9-5

Verifying DNS Settings 9-6

Verifying CiscoUnified CallManager Settings 9-6

CiscoUn ifiedCallMana ger and TFTP Services Are Not Running 9-6

Creating a New Configuration File 9-7

CiscoUn ifiedIP Pho ne Resets Unexpectedly 9-8

Verifying Physical Connection 9-9

Identifying Intermittent Network Outages 9-9

Verifying DHCP Settings 9-9

Checking Static IP Address Settings 9-10

Verifying Voice VLAN Configuration 9-10

Verifying that the Phones Have Not Been Intentionally Reset 9-10

Eliminating DNS or Other Connectivity Errors 9-11

Troubleshooting Cisco Unified IP Phone Security 9-12

General Troubleshooting Tips 9-12

Resetting or Restoring the Cisco Unified IP Phone 9-15

Performing a Basic Reset 9-15

Performing a Factory Reset 9-16

Using the Quality Report Tool 9-17

Where to Go for More Troubleshooting Information 9-18

Cleaning the Cisco Unified IP Phone 9-18