interact osmocombb with OpenBTS

Andrew Reusch areusch at gmail.com
Thu Aug 18 18:22:31 UTC 2011


I just got my setup working a few days ago. One issue for me was that
asterisk needed to be informed about the IMSI; if asterisk rejects a login
of user IMSI###########, OpenBTS will send a location update reject. You
might try checking your asterisk logs...

On Wed, Aug 17, 2011 at 11:41 AM, markus.manninger <
markus.manninger at student.tugraz.at> wrote:

> I allready have the same setup and my osmocom (C123, sylvain branche)
> phone works without any problems with my openBTS (USRP1, v2.6.0).
>
> Max
>
> On 08/16/2011 11:32 AM, josephli [via baseband-devel] wrote:
>
> > Hello every,
> >
> > I recently set up the equipment and tried to communicate with the public
> > PLMN and it worked well at that stage. Then I tried to camp on the
> > OpenBTS after switching on the SIM card. When it progressed to location
> > updating request step, the OpenBTS can not receive identity response
> > from MS. The timer t3210 was fired as long as passing a certain period
> > of time and location updating request was sending again iteratively.
> > Anyway location updating was failed. I checked through wireshark from
> > the mobile phone side, showing that MS did send the response however
> > OpenBTS did not receive somehow. Also the timing advance (ta) during
> > that process became 127 which was abnormal, out of the maximum value of
> > 63. I suspected it was also caused by the failure of reception.
> >
> > Is there something wrong about the decoding at OpenBTS side or data
> > packing error at MS side? Is there any way to fix it?
> >
> > Many thanks,
> >
> > Li
> >
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>
> --
> ----------------------------------
>   Markus Manninger, Ing
>
>   Student of Telematics
>   Graz University of Technology
>   Austria
> ----------------------------------
>
> ------------------------------
> View this message in context: Re: interact osmocombb with OpenBTS<http://baseband-devel.722152.n3.nabble.com/interact-osmocombb-with-OpenBTS-tp3258156p3262554.html>
>
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