You have a G1 as it doesn’t have an I2S over RJ45 output, which was added with G2. Upgrading the OS can only be accomplished by Antipodes themselves, so a support session needs to be booked.
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I would recommend step 1 in January
Followed by step 2 from late 2025 early 2026, if G1 allows (from G2 for sure it does) and if funds permit 
(you will not regret, I promise).
G5 Hardware Update:
Mark Cole confirmed that the G5 technology level will be available for the following models: K21, K22, K30, K40, K41, K50, and OLADRA.
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