MNCC<->SIP bridge; attaches to OsmoMSC to interface with external SIP VoIP telephony https://osmocom.org/projects/osmo-sip-conector
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Keith Whyte 364f237b42 MNCC v8: Implement Basic Support for Global Call Reference.
* Add GCR to mncc struct and therefore bump mncc version.
* Pass the GCR as a SIP Header to SIP UA and retrieve any such header
  from incoming SIP calls, passing the GCR on to MNCC

Related: #OS5164
Depends: osmo-msc I705c860e51637b4537cad65a330ecbaaca96dd5b
Change-Id: Id40d7e0fed9356f801b3627c118150055e7232b1
2021-10-05 20:30:16 +00:00
contrib Bump version: 1.4.1.15-9484-dirty → 1.5.0 2021-02-23 13:42:08 +01:00
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doc debian: create -doc subpackage with pdf manuals 2019-05-29 12:14:22 +02:00
src MNCC v8: Implement Basic Support for Global Call Reference. 2021-10-05 20:30:16 +00:00
tests distcheck/tests: Add the referenced osmoappdesc.py for testing 2016-04-24 22:28:35 +02:00
.gitignore .gitignore: Get rid of new autofoo tmp files 2021-02-02 16:42:12 +01:00
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COPYING Initial commit for a MNCC to SIP gateway (and maybe auth GW too) 2016-03-21 09:54:37 +01:00
Makefile.am Makefile.am: EXTRA_DIST: debian, contrib/*.spec.in 2020-05-22 13:46:54 +02:00
README.asciidoc Write down some of the limitations of the current setup 2016-03-26 16:31:00 +01:00
configure.ac Bump version: 1.4.1.15-9484-dirty → 1.5.0 2021-02-23 13:42:08 +01:00
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osmoappdesc.py osmoappdesc.py: switch to python 3 2019-12-11 09:43:11 +01:00

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.