OsmoMGW¶

OsmoMGW, the Osmocom Media Gateway, is a Media Gateway for handling user plane (voice) traffic in cellular networks.

OsmoMGW supports the IETF MGCP (Media Gateway Control Protocol) for control from Call Agents, such as those present in OsmoBSC and OsmoMSC.

At the moment (August 2022), OsmoMGW implements RTP proxy / RTP bridge type endpoints, to each of which two RTP connections can be established. It also implements RTP / E1 endpoints that allow bridging RTP voice streams to bit synchronous E1 lines. Since each codec uses a specific TRAU format, the codec support is currently limited to GSM-FR and GSM-EFR (16k I.460 subslot).

We are planning to add featurs for

• classic E1/T1 timeslots (64kBps alaw/ulaw)
• announcement/playout end-points
• conference endpoints
• IuUP/RTP to RTP conversion (3G, 2G interoperability)

OsmoMGW is the generalized version of an earlier much more special-purpsoe implementation called osmo-bsc_mgcp.

Situation in a typical Osmocom cellular network¶

Use by OsmoBSC with OsmoBTS¶

Use by OsmoBSC with E1 BTS¶

Use by OsmoHNBGW¶

Use by OsmoMSC¶

Binary Packages¶

Osmocom provides binary packages for several flavors of Debian and Ubuntu GNU/Linux on a variety of architectures (i586, x86_64, armhf, armv7l). Unless you are a software developer interested in developing on Osmocom, it is recommended you use those packages instead of building from source.

For more details see Binary_Packages

User Manuals¶

• osmo-mgw user manual: http://ftp.osmocom.org/docs/latest/osmomgw-usermanual.pdf
• osmo-mgw VTY reference: http://ftp.osmocom.org/docs/latest/osmomgw-vty-reference.pdf

Source code¶

The source code is available from gitea.osmocom.org (module osmo-mgw).

Public read-only access is available via

git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw

You can browse it via gitea: https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw

Contributions are welcome via Gerrit.

Test Suite¶

We have a TTCN-3 test suite as part of our Titan_TTCN3_Testsuites

• source code: https://gitea.osmocom.org/ttcn3/osmo-ttcn3-hacks/src/branch/master/mgw
• results: https://jenkins.osmocom.org/jenkins/view/TTCN3/job/ttcn3-mgw-test/

Contact¶

• Contact us via the openbsc@ mailing list, see Mailing Lists.
• Contributions are welcome via Gerrit.
• Git repository browser at https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw

Commercial Support¶

Commercial support as well as development, system integration and training services for this project are available from sysmocom