Rebooting, Updating Firmware, Factory Reset

If your phone is malfunctioning or require updates you or your phone system administrator may want to perform one of the following:


Rebooting - this will bring the phone back to the its last configured state. It is also required sometimes when TeleConsole settings have been updated such as after modifying TeleConsole BLF settings.


Updating configuration - when new settings are applied to the phone this process ensures they take effect. 


Factory reset - this erases the current configuration and apply the original configuration the phone was shipped with from the factory.  


Rebooting Your Phone


In most cases this can be attempted when your phone malfunctions without much concern. If this fails to solve the problem you can attempt the other two methods.


To reboot your phone:


  • Navigate to Menu>Settings>Basic Settings>Reboot.

  • A confirmation message is displayed, confirming that you want to reboot the phone.

  • Press OK to reboot the phone.

You can also long press the X key when the phone is idle to reboot the phone.


Upgrading the Firmware


Firmware files can be downloaded from the Yealink support portal for either the T42S model or the T42G model. The file should be stored on a computer or network location that can be accessed by the web interface. 


You can check the current firmware version installed on the phone to see if an update is indeed required. 


To check the firmware version via phone user interface: 


  • Press    or press Menu>Status.

  • Press    or    to scroll through the list to view phone status information.

    The firmware version is the 3rd item.

    You may need to provide some of the information listed here, besides the firmware version, to your phone system administrator for additional phone support or maintenance.

To check the firmware version via  web user interface:

 

  • Access the phone via the web user interface as explained here.

  • The firmware version is the first item found under the Status>Status path on the first page of the web user interface.



    Other information is show here including IPv4 or IPv6 status, network configuration, and account status. You may need to provide some of this information, besides the firmware version, to your phone system administrator for additional phone support or maintenance.

To upgrade firmware via web user interface: 


  • Click on Settings>Upgrade.

  • Click Browse to locate the required firmware from your local system.

  • Click Upgrade to upgrade the firmware.



    The browser pops up the dialog box “Firmware of the SIP Phone will be updated. It will take 5 minutes to complete. Please don't power off!”.

  • Click OK to confirm upgrading.

The interface will show “Firmware updating. Please wait and do not power off! And the browser must not be closed or refreshed!". The phone will reboot once the upgrade is finished.


Factory Reset


This is only recommended after you have tried all other troubleshooting suggestions since the operation will delete all your personal configuration settings and reset them to the factory defaults. It is therefore advisable to have your phone system administrator backup your personalized settings before proceeding with a factory reset.


To perform a factory reset: 


  • Navigate to to Menu>Settings>Advanced Settings>Reset Config.

  • Highlight the Reset to Factory Settings, and then press Reset.

    A confirmation message is displayed, confirming that you want to reset the setting.



  • Press OK.

    The phone begins resetting.

You can also long press the OK key when the phone is idle.


The LCD screen prompts “Welcome Initializing…Please wait”. The process will take a few minutes. Do not power off until the phone has started up successfully.

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