Btw, I'm not sure 27 DESTINATION_OUT_OF_ORDER is the best cause in
this case. Two other options I see suitable are 102
RECOVERY_ON_TIMER_EXPIRE and 604 MEDIA_TIMEOUT. Does anyone know is
there an official mapping between Q.850 codes and various GSM cause
codes?

Another useful change here would be to propagate information about
which timer expired. That would help to gather information about
issues with the network.

On Sat, Sep 12, 2015 at 8:48 PM, Alexander Chemeris
<alexander.chemeris@gmail.com> wrote:
> Previously we were sending a generic "Resource unavailable" cause code making
> it impossible to distinguish real error cases from a regular radio link failure.
> This was the reason for many "unknown" call errors we've seen at Rhizomatica
> installations. Now they are properly classified as non-erroneous call failures.
>
> The code is also a part of the achemeris/mncc_cause_fixes_master branch.
>
> --
> Regards,
> Alexander Chemeris.
> CEO, Fairwaves, Inc.
> https://fairwaves.co
>
>



--
Regards,
Alexander Chemeris.
CEO, Fairwaves, Inc.
https://fairwaves.co