Where can I find up to date and correct specification of the protocol(s) used by the hot spot to talk to the gateways (IPSC or IPSC2 or what?).
I did find an old document (2015) that described it but looking at the packets I see that there is an extra pair of bytes and a possible error too.
IPSC specification(s)
Re: IPSC specification(s)
You could join this group and ask around there:
https://dvswitch.groups.io
but I saw a message that says this:
"IPSC2 servers send one additional packet at the end of a data stream that is outside of the protocol spec defined by DMR+ and Brandmeister. It does not affect usability. To date I have had no luck finding out what it is, though Artem at Brandmeister was going to try and look into it. BM has made the protocol open to all, DMR+ considers it their IP and is not interested in publication."
As you can see, this whole thing appears to suffer from a lack of full openness which is not that unusual within amateur radio in my experience.
https://dvswitch.groups.io
but I saw a message that says this:
"IPSC2 servers send one additional packet at the end of a data stream that is outside of the protocol spec defined by DMR+ and Brandmeister. It does not affect usability. To date I have had no luck finding out what it is, though Artem at Brandmeister was going to try and look into it. BM has made the protocol open to all, DMR+ considers it their IP and is not interested in publication."
As you can see, this whole thing appears to suffer from a lack of full openness which is not that unusual within amateur radio in my experience.
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Brian G8SEZ
Brian G8SEZ