Cisco 7906G - Unified IP Phone VoIP Administration Manual page 233

Chapter 9 Troubleshooting and Maintenance
Table 9-2
Summary
Moving a network connection
from the phone to a
workstation.
Changing the telephone
configuration.
Phone resetting.
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.1
OL-14585-01
Cisco Unified IP Phone Troubleshooting (continued)
Explanation
If you are powering your phone through the
network connection, you must be careful if you
decide to unplug the phone's network
connection and plug the cable into a desktop
computer.
Caution
By default, the network configuration options
are locked to prevent users from making
changes that could impact their network
connectivity. You must unlock the network
configuration options before you can configure
them. See the
Options" section on page 4-4
The phone resets when it loses contact with the
Cisco Unified Communications Manager
software. This lost connection can be due to
any network connectivity disruption, including
cable breaks, switch outages, and switch
reboots.
General Troubleshooting Tips
The computer's network card cannot
receive power through the network
connection; if power comes through
the connection, the network card can
be destroyed. To protect a network
card, wait 10 seconds or longer after
unplugging the cable from the phone
before plugging it into a computer.
This delay gives the switch enough
time to recognize that there is no
longer a phone on the line and to
stop providing power to the cable.
"Unlocking and Locking
for details.
9-17