Hi @john.dursel, @jean-francois.meyer
This problem is caused by an old hardware version 0.2. This one maybe doesn’t allow newer firmware versions on it. You can try downloading the firmware 01.08.07.
Please refer to My EM7455 has no carrier pri and a carrier/config name missmatch
Firmware updating Dell 5811e with ancient firmware (SWI9X30C_00.08.02.00) - #16 by ctx1001