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osmo-sip-connector
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MNCC<->SIP bridge; attaches to OsmoMSC to interface with external SIP VoIP telephony https://osmocom.org/projects/osmo-sip-conector
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Holger Hans Peter Freyther 9d796ff156 mncc: Enable in-band signalling for early media 
Besides sending the alerting request we should inform the
MS that there is in-band information now. We do not seem
to export these flags in protocol/gsm_04_08.h so hardcode
them for now (until I come up with good names for them).

Related: OS#1784

Change-Id: I80b1e1f4ca045bd63536476702a5812f27d9b36d
 		2017-03-23 09:01:14 +00:00
contrib testpbx: Add another number that will just play a ringback 2017-03-23 09:41:25 +01:00
debian debian: Add dh-autoreconf required by the debian packaging 2016-03-31 20:04:54 +02:00
doc/examples vty: Work on configuration of the MNCC to SIP gateway 2016-03-21 15:39:41 +01:00
src mncc: Enable in-band signalling for early media 2017-03-23 09:01:14 +00:00
tests distcheck/tests: Add the referenced osmoappdesc.py for testing 2016-04-24 22:28:35 +02:00
.gitignore Initial commit for a MNCC to SIP gateway (and maybe auth GW too) 2016-03-21 09:54:37 +01:00
COPYING Initial commit for a MNCC to SIP gateway (and maybe auth GW too) 2016-03-21 09:54:37 +01:00
Makefile.am distcheck/tests: Add the referenced osmoappdesc.py for testing 2016-04-24 22:28:35 +02:00
README.asciidoc Write down some of the limitations of the current setup 2016-03-26 16:31:00 +01:00
configure.ac configure: check for pkg-config presence 2016-10-01 01:07:11 +02:00
git-version-gen Initial commit for a MNCC to SIP gateway (and maybe auth GW too) 2016-03-21 09:54:37 +01:00
osmoappdesc.py distcheck/tests: Add the referenced osmoappdesc.py for testing 2016-04-24 22:28:35 +02:00

README.asciidoc 

Osmo SIP Connector
==================

Simple utility to map MNCC to SIP and SIP to MNCC. The VTY interface
can be used to make configurations. The code doesn't have any RTP or
transcoding support.

Call identities can be either the MSISDN or the IMSI of the subscriber.


Requirements of Equipment
^^^^^^^^^^^^^^^^^^^^^^^^^

* DTMF need to be sent using SIP INFO messages. DTMF in RTP is not
supported.

* BTS+PBX and SIP connector+PBX  must be in the same network (UDP must be
able to flow directly between these elements)

* No handover support.

* IP based BTS (e.g. Sysmocom sysmoBTS but no Siemens BS11)

* No emergency calls

Limitations
^^^^^^^^^^^

* PT of RTP needs to match the one used by the BTS. E.g. AMR needs to use
the same PT as the BTS. This is because rtp_payload2 is not yet supported
by the osmo-bts software.

* AMR SDP file doesn't include the mode-set params and allowed codec modes.
This needs to be configured in some way.