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Osmocom Media Gateway (RTP proxy and RTP/E1 gateway) https://osmocom.org/projects/osmo-mgw
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Andreas Eversberg dc7dfd0bbd ASCI: Add new mode for voice group/broadcast call 
The new mode "confecho" is similar to "sendrecv", except that it also
echoes back RTP towards the sender. This is required for voice group or
broadcast calls. Talker and listeners use the same timeslot, so that
audio must be echoed from the talker to the listeners.

It is different from "loopback", because a loopback only echoes back RTP
towards the sender, but does not forward audio through the endpoint to
the other connections. Also it does not forward RTP from senders of
other connections.

The current implementation of MGW does not support transcoding and
mixing. This means that a sending connection must not send RTP that has
been received by multiple receiving connections. The application that
uses the MGW has to set the connection modes, so that only one
connection receives RTP in case of a conference.

Change-Id: I0639c663e119d85bef1010c7aa45e2f133a9daf0
Related: OS#4853
 		2023-07-10 11:54:16 +02:00
contrib systemd: depend on networking-online.target 2023-05-26 14:10:46 +02:00
debian copyright: fix typo: sysmocom s/s.m.f.c./s.f.m.c./ GmbH 2023-05-18 17:22:26 +07:00
doc mgw: Allow auditing speciall 'null' endpoint 2023-06-15 11:08:50 +02:00
include ASCI: Add new mode for voice group/broadcast call 2023-07-10 11:54:16 +02:00
m4 Drop unneeded ax_check_compile_flag.m4 2022-01-11 17:46:41 +00:00
src ASCI: Add new mode for voice group/broadcast call 2023-07-10 11:54:16 +02:00
tests mgcp-client: Add keepalive feature 2023-06-15 16:46:46 +02:00
.clang-format clang-format: remove foreach macros 2021-11-17 21:20:08 +00:00
.gitignore add vscode stuff to gitignore 2021-09-09 16:04:17 +02:00
.gitreview .gitreview: update repo url to new location 2017-08-08 17:15:31 +02:00
.mailmap add .mailmap file for mapping git author name/mail in shortlog 2016-08-08 17:40:28 +00:00
AUTHORS move openbsc/* to repos root 2017-08-27 17:44:55 +02:00
COPYING move openbsc/* to repos root 2017-08-27 17:44:55 +02:00
Makefile.am manuals: generate vty reference xml at build time 2020-07-11 02:02:50 +00:00
README Remove libosmo-legacy-mgcp and osmo-bsc-mgcp 2018-09-06 20:39:53 +00:00
README.vty-tests update git URLs (git -> https; gitea) 2022-06-18 12:18:10 +02:00
TODO-RELEASE mgcp_client: Introduce mgcp_client_conf_alloc(), deprecate mgcp_client_conf_init() 2023-06-14 10:59:50 +02:00
configure.ac mgcp_client: Introduce mgcp_client_conf_alloc(), deprecate mgcp_client_conf_init() 2023-06-14 10:59:50 +02:00
git-version-gen git-version-gen: Don't check for .git directory 2018-07-24 18:06:54 +02:00
libosmo-mgcp-client.pc.in separate libosmo-mgcp-client from mgcp server code 2017-09-05 20:56:27 +00:00
osmoappdesc.py osmoappdesc.py: switch to python 3 2019-12-11 09:35:24 +01:00

README 

About OsmoMGW
=============

OsmoMGW originated from the OpenBSC project, which started as a minimalistic
all-in-one implementation of the GSM Network. In 2017, OpenBSC had reached
maturity and diversity (including M3UA SIGTRAN and 3G support in the form of
IuCS and IuPS interfaces) that naturally lead to a separation of the all-in-one
approach to fully independent separate programs as in typical GSM networks.

OsmoMGW was one of the parts split off from the old openbsc.git. It originated
as a solution to merely navigate RTP streams through a NAT, but has since
matured to a Media Gateway implementation that is capable of streaming RTP for
2G (AoIP) and 3G (IuCS) GSM networks as well as (still not implemented at time
of writing) transcoding between TRAU, various RTP payloads and IuUP.

The OsmoMGW program exposes an MGCP interface towards clients like OsmoMSC and
OsmoBSC, and receives and sends RTP streams as configured via MGCP.

The libosmo-mgcp-client library exposes utilities used by e.g. OsmoMSC (found
in osmo-msc.git) to instruct OsmoMGW via its MGCP service.

Find OsmoMGW issue tracker and wiki online at
https://osmocom.org/projects/osmo-mgw
https://osmocom.org/projects/osmo-mgw/wiki