I was interested in getting involved in some open source development. With a signal processing background, I thought osmo-tetra might be a good project. Looking at some data from the New Jersey Transit Authority I noticed something odd though. Some of the Broadcast PDUs had a type of 3, which in the spec is only listed as "Reserved." What's more, the control channels there seem to be missing SYSINFO messages. I'm guessing that somehow their system does a modified SYSINFO (which is normally broadcast type 0) and labels it 3? Is anyone familiar with the format they use for that message? Thanks.
Hi Eric,
thanks for reaching out and your interest in working on Open Source TETRA.
I've not encountered any non-standard systems like you describe before, sorry.
All the networks I've received/decoded here in Germany looked exactly like in the specs, AFAICT.
Do you know which equipment vendor is used in the network you're describing? Maybe that's matter of public record (tenders, ...)?
Regards, Harald