^**__Question:__** What are the differences in versions?^
|**__Answer:__** Link: [[axumversion:start|please read the info at this link]]|

^  Version  ^  Release date  ^  Axum backplane PCB info and modifications  ^
|  Rev. A  |  16-10-2008  |  Dante and AES67-USB card doesn't work, which means the Backplane has to be replaced for a newer revision!  |
|    "     |      "       |  New cards probably won't work because of Firmware differences!  |
^  ^  ^  ^
|  Rev. B  |  14-04-2011  |  unknown if AES67-USB card works  |
^  ^  ^  ^
|  Rev. C  |  22-07-2013  |  Improved digital clock  |
|  Rev. C  |  22-07-2013  |  AES67-USB card supported  |
^  ^  ^  ^
|  Rev. C  |  27-02-2020  |  Firmware update: Slot 19 fix to support AES67-USB card  |
|  Rev. C  |      "       |  Slots 18 - 19 support 32x Mono in 32x Mono out (Remote software update needed)  |
^  ^  ^  ^
|  Rev. C  |  05-05-2021  |  Slots 12 - 19 support 32x Mono in 32x Mono out (Backplane firmware and software update is needed)  |
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