Cisco 7906G Administration Manual page 222

General Troubleshooting Tips
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 Administration Guide for Cisco Unified CallManager 5.1
9-16
Cisco Unified IP Phone Troubleshooting (continued)
Chapter 9 Troubleshooting and Maintenance
Explanation
If you are powering your phone through
the network connection, you must be
careful if you decide to unplug the phone
network connection and plug the cable
into a desktop computer.
The computer's network card
Caution
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.
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.
The phone resets when it loses contact
with the Cisco Unified CallManager
software. This lost connection can be due
to any network connectivity disruption,
including cable breaks, switch outages,
and switch reboots.
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