Hi Nava,

I have tried the same some time ago. LCR-SIP implementation seems very nice in what you trying to do without using asterisk. I managed to get calls ring back and forward in a similar setup but i was running into serious problems with RTP/media. This was mainly due to transcoding or rtp-bridge functions. I was some what successful with the help from andreas but could not make it work 100%.

May be now there is a fix for the rtp issues which i never tried after that.

Give it a try using the latest git clone from LCR and see. As i can remember you need to check out jolly/rtpmux branch in order to get this working. Andreas can give some hint if possible on this.

Good luck.

Nik.

On Mon, Oct 15, 2012 at 9:54 PM, Kelum Navaratne <kelum.nava@gmail.com> wrote:
Hello list,

First of all congratulation to developers of this project making such wonderful project in an interesting subject. I am new to this project and for past few days i managed to go through the documentation and get most of it tested. Thanks for pretty good documentation in most of the areas as well.

I have the osmo-nitb working very fine using a nano bts.

How ever when i try to install it with LCR to interconnect with external switch, im facing some problems. Initially i thought i must use LCR+Asterisk. But later i figured out there is a built in SIP interface on LCR which there is no need to asterisk or chan_asterisk. I would prefer to use this LCR SIP interface as i dont want to use asterisk and just want to forward all calls to another SIP switch.

Now in this context there seems absolutely no documentation on both openbsc and LCR/mISDN lists.

Can some one please shed me some light here on how to build a LCR with SIP to be work with osmo-nitb.

All i want to test is

GSM phone > Osmo-nitb > LCR with SIP > SIP softswitch

Thank you very much for every one's effort in this project and would be glad to see some response for this.

Best Regards
Nava.