Cisco 7906G Administration Guide

Chapter 9 Troubleshooting and Maintenance
Cisco Unified IP Phone Resets Unexpectedly
9-8
Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
OL-11515-01
If the phone is already in the Cisco Unified CallManager database, its
configuration file may be damaged. See the
“Creating a New Configuration File”
section on page 9-6 for assistance.
Cisco Unified IP Phone Resets Unexpectedly
If users report that their phones are resetting during calls or while idle on their
desk, you should investigate the cause. If the network connection and
Cisco
Unified CallManager connection are stable, a Cisco Unified IP Phone
should not reset on its own.
Typically, a phone resets if it has problems connecting to the Ethernet network or
to Cisco
Unified CallManager. These sections can help you identify the cause of
a phone resetting in your network:
• Verifying Physical Connection, page 9-8
• Identifying Intermittent Network Outages, page 9-8
• Verifying DHCP Settings, page 9-9
• Checking Static IP Address Settings, page 9-9
• Verifying Voice VLAN Configuration, page 9-9
• Verifying that the Phones Have Not Been Intentionally Reset, page 9-10
• Eliminating DNS or Other Connectivity Errors, page 9-10
Verifying Physical Connection
Verify that the Ethernet connection to which the Cisco Unified IP Phone is
connected is up. For example, check if the particular port or switch to which the
phone is connected is down.
Identifying Intermittent Network Outages
Intermittent network outages affect data and voice traffic differently. Your
network might have been experiencing intermittent outages without detection. If
so, data traffic can resend lost packets and verify that packets are received and

Cisco 7906G Specifications

General

Brand	Cisco
Model	7906G
Category	IP Phone
Language	English