application TCH support for nanoBTS

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Dieter Spaar spaar at mirider.augusta.de
Tue Jul 28 20:58:46 UTC 2009


Hello Harald,

On Tue, 28 Jul 2009 19:18:52 +0200, "Harald Welte" <laforge at gnumonks.org> wrote:
> 
> Using this mode, I have created a pcap file with OML+RSL bringup, followed by
> one call between two MS (extn. 1005 calls 1003) where all RTP/RTCP packets are
> visible.  The call uses EFR, since that is hardcoded in many places all over
> OpenBSC at the moment.
> 
> The pcap file is available from
> http://bs11-abis.gnumonks.org/trac/attachment/wiki/nanoBTS/ipaccess-startup-mo_to_mo_call-proxy.pcap

I just took a quick look at the dump with Wireshark, its possible to
safe the raw RTP payload from within Wireshark and it looks OK (31-byte
EFR packages starting with 0xC in the high nibble). However I have
no ready-made EFR decoder available so I can't decode the speech.

Best regards,
  Dieter
-- 
Dieter Spaar, Germany                           spaar at mirider.augusta.de




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