Cisco 6921 Administration Guide

CHAPTER
9-1
Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-24567-01
9
Troubleshooting and Maintenance
This chapter provides information that can assist you in troubleshooting problems with your Cisco
Unified IP Phone or with your IP telephony network. It also explains how to clean and maintain your
phone.
If you need additional assistance to resolve an issue, see the “Obtaining Documentation, Obtaining
Support, and Security Guidelines” section on page xi.
This chapter includes these topics:
• Resolving Startup Problems, page 9-1
• Cisco Unified IP Phone Resets Unexpectedly, page 9-6
• Troubleshooting Cisco Unified IP Phone Security, page 9-8
• General Troubleshooting Tips, page 9-9
• Resetting or Restoring the Cisco Unified IP Phone, page 9-12
• Monitoring the Voice Quality of Calls, page 9-13
• Where to Go for More Troubleshooting Information, page 9-15
• Cleaning the Cisco Unified IP Phone, page 9-15
Resolving Startup Problems
After installing a Cisco Unified IP Phone into your network and adding it to Cisco Unified
Communications Manager, the phone should start up as described in the “Verifying the Phone Startup
Process” section on page 3-14. If the phone does not start up properly, see the following sections for
troubleshooting information:
• Symptom: The Cisco Unified IP Phone Does Not Go Through its Normal Startup Process, page 9-2
• Symptom: The Cisco Unified IP Phone Does Not Register with Cisco Unified Communications
Manager, page 9-2
• Symptom: Cisco Unified IP Phone Unable to Obtain IP Address, page 9-5
• Symptom: The Cisco Unified IP Phone Displays the Message Security Error, page 9-6

Cisco 6921 Specifications

General

Brand	Cisco
Model	6921
Category	IP Phone
Language	English