Yealink SIP-T48G Administrator's Manual page 72

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
A dialog box pops up to prompt that settings will take effect after a reboot.
3. Click Confirm to accept the change.
You can initiate an update immediately, just power off the phone and power on it again.
The phone will boot up, check for updates and apply the updates. You can also trigger
an update manually via phone user interface.
To trigger an update manually via phone user interface:
1. Press Menu->Settings->Basic Settings->Firmware Update.
2. Press the Enter soft key or the OK key.
The LCD screen prompts "New firmware, update now?".
3. Press the OK soft key to confirm the update.
If there is no update available on Lync Server, the LCD screen prompts "The
firmware is the latest".
60