Cisco 7961G Administration Guide

Chapter 9 Troubleshooting and Maintenance
Cisco IP Phone Resets Unexpectedly
9-10
Cisco IP Phone Administration Guide for Cisco CallManager, Cisco IP Phone 7961G/7961G-GE and 7941G/7941G-GE
OL-6966-01
Cisco IP Phones send messages with request type 151 to renew their DHCP
address leases. If the DHCP server expects messages with request type 150,
the lease will be denied, forcing the phone to restart and request a new
IP address from the DHCP server.
Checking Static IP Address Settings
If the phone has been assigned a static IP address, verify that you have entered the
correct settings. See the “Network Configuration Menu” section on page 4-6 for
more information.
Verifying the Voice VLAN Configuration
If the Cisco IP Phone appears to reset during heavy network usage (for example,
following extensive web surfing on a computer connected to the same switch as
the phone), it is likely that you do not have a voice VLAN configured.
Isolating the phones on a separate auxiliary VLAN increases the quality of the
voice traffic. See the “Understanding How the Cisco IP Phone Interacts with the
VLAN” section on page 2-3 for details.
Verifying that the Phones Have Not Been Intentionally Reset
If you are not the only administrator with access to Cisco CallManager, you
should verify that no one else has intentionally reset the phones.
You can check whether a Cisco IP Phone received a command from
Cisco CallManager to reset by pressing the Settings button on the phone and
choosing Status > Network Statistics. If the phone was recently reset one of
these messages appears:
• Reset-Reset—Phone closed due to receiving a Reset/Reset from
Cisco CallManager administration.
• Reset-Restart—Phone closed due to receiving a Reset/Restart from
Cisco CallManager administration.

Cisco 7961G Specifications

General

Brand	Cisco
Model	7961G
Category	IP Phone
Language	English