Thanks seems I had/have got a bit more learning to do about these frequencies.
The devices in theory are specified as “AU915-928, AS923” and I have to admit when I bought them from an Australian supplier I was going to get them ready for Australian frequency, so had assumed they were 915, but the only label on the devices actually says 923, so, I’ve enquired with the supplier. It seems they might be programmable to one or the other.
If I understand you correctly, if needed, I can configure my gateway to us AS923 but in doing so will need to choose a non-AU TTN server.
Thanks,
Roger.