UPGRADING SOFTWARE
We recommend that you let Konftel Upgrade Utility automatically download and install the latest version from Konftel’s website. You can also install a Konftel firmware file that has already been downloaded to the PC’s hard drive.
UPGRADING VIA AN SD CARD
This method requires a PC with an SD card reader.
Downloading upgrade files
Visit www.konftel.com/upgrades and select Konftel 55.
Download the latest software version for the Konftel 55/55W.
Copy the file (with .kt extension) to an SD card.
Updating software
Insert the SD card with the software file in the Konftel 55.
Press 
MENU, select 
System.
Press the Upgrade button and confirm by pressing 
to reboot in upgrade mode.
The Konftel 55 restarts in upgrade mode.
Press 
Use USB when the Konftel 55 reboots.
Follow the instructions that are displayed on the Konftel 55.
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