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Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)
OL-20861-01
Chapter 12 Troubleshooting and Maintenance
Resetting the Cisco Unified IP Phone
Resetting the Cisco Unified IP Phone
Performing a reset of a Cisco Unified IP Phone provides a way to recover if the phone experiences an
error and provides a way to reset or restore various configuration and security settings.
Table 12-3 describes the types of resets you can perform. You can reset a phone with any of these
operations after the phone has started up. Choose the operation that is appropriate for your situation.
Table 12-3 Basic Reset Methods
Operation Performing Explanation
Reset Settings From the Administrator Settings menu,
unlock phone options (see the “Unlocking and
Locking Options” section on page 7-3), then
choose Reset Settings > All Settings.
Resets user and network configuration settings to their
factory-default values, and restarts the phone.
Before you perform a factory reset, ensure that the
following conditions are met:
• The phone must be on a DHCP-enabled network.
• A valid TFTP server must be set in DHCP option 150
or option 66 on the DHCP server.
The following occurs on the phone when you perform a
reset:
• User configuration settings—Resets to default values
• Network configuration settings—Resets to default
values
• Call histories—Gets erased
• Locale information—Resets to default values
• Phone application—Gets erased (phone recovers by
using the image in the inactive partition of flash to
boot up).
• Security settings—Resets to default values; this
includes deleting the CTL file, deleting the MD5
secret, and changing the 802.1x Device
Authentication parameter to “Disabled.”
Note Do not power down the phone until it completes
the factory reset process, and the main screen
appears.
From the Admin Settings menu, unlock phone
options (see the “Unlocking and Locking
Options” section on page 7-3), then choose
Reset Settings > Network Settings.
Resets network configuration settings to their default
values and resets the phone. (This method causes DHCP to
reconfigure the IP address of the phone.)
From the Administrator Settings menu,
unlock phone options (see the “Unlocking and
Locking Options” section on page 7-3), then
choose Reset Settings > Reset Device.
Resets any user and network configuration changes that
you have made, but that the phone has not written to its
Flash memory, to previously saved settings.
From the Administrator Settings menu,
unlock phone options (see the “Unlocking and
Locking Options” section on page 7-3), then
choose Reset Settings > Security Settings.
Deletes only the CTL file.