osmo-bts-trx: "CHAN RQD: no resources for SDCCH" on master

Harald Welte laforge at gnumonks.org
Sat Apr 9 08:49:41 UTC 2016

Hi Tom and list,

On Fri, Apr 08, 2016 at 03:55:42PM -0700, Tom Tsou wrote:
> Hopefully, somebody more familiar than myself with A-bis and related
> L1/L2 dependencies can provide some insight on why the above is
> happening or where to start debugging. 

Everything seems fine up and until frame 225, but in frame 226, the BSC
is sending another "Set BTS Attributes".  This message re-sets a lot of
the other managed objects and results in the transceiver (and channels)
being disabled again(Frame 230..233), which means the BSC cannot
activate any logical channel.

"Set BTS Attributes" is originally sent in frame 23, and at the moment
Im not quite sure yet why that happens.

So basically everythign looks fine and is brought up correctly,
including all the channels (aka timeslots), but then one message
destroys it all.

> I'll be happy to test any subsequent changes or look into specific
> parts of the A-bis code.

Thanks in advance.
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
"Privacy in residential applications is a desirable marketing option."
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