Changing the SBC Boot Image disrupts call services on the SBC, when the restart required to make the upgrade effective is performed, and should only be completed during a scheduled service outage.
To upgrade the Boot Image:
In the left navigation pane, go to System > Software Management > Boot Partition.
Click the Upload Boot Imagelink located on the top right hand side of the pane.
Throughout the upload process, the web interface will dispatch a series of status messages: click image thumbnails to see them in full resolution
On the Boot Partition page, verify that the Last Upload Status is listed as Success
After the Boot Image is successfully upgraded, you must reboot the SBC for the changes to take effect.