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Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 6.0
OL-12642-01
Chapter 9 Troubleshooting and Maintenance
Resetting or Restoring the Cisco Unified IP Phone
Performing a Basic Reset
Performing a basic 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 9-4 describes the ways to perform a basic reset. You can reset a phone with any of these operations
any time after the phone has started up. Choose the operation that is appropriate for your situation.
Table 9-4 Basic Reset Methods
Operation Performing Explanation
Restart phone From the Main screen, press Settings to
displays the Settings menu, then press
**#**.
Note This basic reset sequence also
works from any other screen
that does not accept user input.
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, then restarts the phone.
Erase softkey From the Settings menu, unlock phone
options (see the
“Unlocking and
Locking Options” section on page 4-3).
Then press the Erase softkey.
Resets user and network configuration
settings to their default values, deletes
the CTL file from the phone, and
restarts the phone.
From the Network Configuration
menu, unlock phone options (see the
“Unlocking and Locking Options”
section on page 4-3). The press the
Erase softkey.
Resets network configuration settings
to their default values and resets the
phone. (This method causes DHCP
reconfigure the IP address of the
phone.)
From the Security Configuration menu,
unlock phone options (see the
“Unlocking and Locking Options”
section on page 4-3). Then press the
Erase softkey.
Deletes the CTL file from the phone
and restarts the phone.
Performing a Factory Reset
When you perform a factory reset of the Cisco Unified IP Phone, the following information is erased or
reset to its default value:
• CTL file—Erased
• LSC—Erased
• User configuration settings—Reset to default values
• Network configuration settings—Reset to default values
• Call histories—Erased
• Locale information—Reset to default values
• Phone application—Erased (phone recovers by loading the term75.default.loads file)
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 DCHP option 150 or option 66 on the DHCP server.
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