Yealink SIP-T48G - Manual (Page 162)

User Guide for the SIP-T48G IP Phone
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To import the phone configurations via web user interface:
1. Click on Settings->Configuration.
2. Click Browse to locate a configuration file from your local system.
3. Click Import to import the configuration file.
Note
How to upgrade firmware?
To upgrade firmware via web user interface:
1. Click on Settings->Upgrade.
2. Click Browse to locate the firmware from your local system.
3. 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!”.
4. Click OK to confirm upgrading.
How to reset the phone?
Reset the phone to factory configurations after you have tried almost all troubleshooting
suggestions but do not solve the problem. You need to note that all custom settings will
be overwritten after reset.
To reset the phone via phone user interface:
1. Tap ->Advanced (password: admin) ->Reset to Factory.
2. Tap the gray box of the Reset Option field.
3. Tap the desired reset option from the pull-down list.
The file format of configuration file must be *.bin.