Ecessa product models with SSD storage running versions 11.0 and newer have recovery partitions that can be used to restore the devices software without an internet connection.
To update a recovery partition to a newer version of software than what the device was shipped with use the command:
system software modify [recovery INDEX]
The INDEX specifies the partition to copy from. For example, to copy from partition 1 to the recovery partition the command would be system software modify recovery 1.