In the web interface of the 2N® IP Intercom, go to System > Maintenance.

Upgrade via uploading a file – press the Upgrade Firmware button.

   

Automatic upgrade – press the Upgrade Now button when the intercom says that a new version is available

Beta firmware – you can try to update by a beta version of the firmware when available. Enable "Notify of Beta Versions" parameter.

Thank you very much for cooperation.