XBee PRO 802.15.4: detect standard and "J" version? "J" state with FW update?

Is it possible to decide XBee Pro modules standard (XBP24-AUI-001) and “J” version (XBP24-AUI-001J) on interface side by reading the configuration parameters?

Will the “J” state be lost by a firmware update with the XCTU (FW: 10ec)?

No it is not possible. The J indicates that it is calibrated for use in Japan and Europe. That is to say, a lower output power.

No changing firmware will not affect the J standing.

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So looking on the label or measuring of the output power is the only way to decide between “J” Version and standard version.
Thanks,
Martin