Is it possible to configure a Digi passport with a configuration file automatically read from a USB memory?

Would like to send a configuration (file) via mail and have a local tech put it on a USB stick and then if possible have this configuration file to be read by the Digi and apply it.

It it ok to do a factury default on the device.
It is ok if only the IP address/Netmask/defaultgw is read and applied

Rest of configuration can be handled as soon as the device have network connectivity

Any functions for this?

Or any other way to do the same thing?

I most likely cannot use DHCP/TFTP.
And i would like to keep it as simple as possible for the local tech…