What is the function of the Fallback Country parameter?

The SM automatically inherits the Country Code setting of the AP (except for US-locked devices).

Fallback Country is used by the SM if the AP does not provide a Country Code to the SM during registration and affect the radios in the following ways::

  • Maximum transmit power limiting (based on radio transmitter power plus configured antenna gain)
  • DFS operation is enabled based on the configured country code, if applicable
  • Frequency selection is based on local regulatory limits