min,
We have development builds of the Dot Libraries available that allow the AS923 channel plan to be used on mDot and xDot.
https://developer.mbed.org/teams/MultiTech/code/libxDot-dev-mbed5/
https://developer.mbed.org/teams/MultiTech/code/libmDot-dev-mbed5/
Firmware updates for the DotBox will be coming later.
Cheers,
Mike