From carlsen.eric+forums at gmail.com  Fri Mar 29 00:49:30 2019
From: carlsen.eric+forums at gmail.com (Eric C.)
Date: Thu, 28 Mar 2019 18:49:30 -0600
Subject: Broadcast PDU type 3
Message-ID: <CABf-Ja66GhLkrkcd1_EeSgUDcQY1rcS0d-4Nngte2KGQZpVRsQ@mail.gmail.com>

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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/tetra/attachments/20190328/c998c33d/attachment.htm>

From laforge at gnumonks.org  Fri Mar 29 09:41:49 2019
From: laforge at gnumonks.org (Harald Welte)
Date: Fri, 29 Mar 2019 10:41:49 +0100
Subject: Broadcast PDU type 3
In-Reply-To: <CABf-Ja66GhLkrkcd1_EeSgUDcQY1rcS0d-4Nngte2KGQZpVRsQ@mail.gmail.com>
References: <CABf-Ja66GhLkrkcd1_EeSgUDcQY1rcS0d-4Nngte2KGQZpVRsQ@mail.gmail.com>
Message-ID: <20190329094149.GF18455@nataraja>

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
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)