application TCH support for nanoBTS

Hi Andreas, On Mon, Jul 27, 2009 at 07:59:01PM +0200, Harald Welte wrote: In fact, it was much more difficult than expected. Since I only have one nanoBTS available right now, all RTP sessions usually originate and terminate on the device itelf and you never see the RTP streams. So I've had to add RTP/RTCP proxy functionality to OpenBSC first. Now even calls between two MS on the same BTS can be routed via the RTP/RTCP proxy (by using the new "-P" option of bsc_hack). 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… The call content is an inquiry about the subway schedule between a male and a female speaker. Using the rtp_proxy code as a reference, it should be relatively easy to take those RTP packets and stuff them in TRAU frames (or vice versa), or passt their content upwards to an application. Also, we still want to see the TRAU and RTP code move into a separate process. I've tried to prepare by ths, impementing all RTP related functions in gsm_04_08 rather than abis_rsl. Regards, -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)