Osmocom Mobile Switching Centre
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Oliver Smith 30eb8b7a37
Release v1.7.1 on 2021-09-16.
11 months ago
contrib Release v1.7.1 on 2021-09-16. 11 months ago
debian Release v1.7.1 on 2021-09-16. 11 months ago
doc Support setting rt-prio and cpu-affinity mask through VTY 2 years ago
include gsm_network: drop unused neighbor_list member 2 years ago
m4 move openbsc/* to repos root 5 years ago
src fix _gsm48_cc_trans_free(): send MNCC REL.ind on Clear Request 2 years ago
tests msc_vlr_test: remove DLMGCP log messages from unit test output 11 months ago
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AUTHORS move openbsc/* to repos root 5 years ago
COPYING move openbsc/* to repos root 5 years ago
Makefile.am manuals: generate vty reference xml at build time 2 years ago
README README update. Explain more what it is than just the history 2 years ago
README.vty-tests Remove obsolete ./configure option 5 years ago
TODO-RELEASE Bump version: 1.6.1.98-cad22-dirty → 1.7.0 1 year ago
configure.ac Release v1.7.1 on 2021-09-16. 11 months ago
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osmoappdesc.py osmoappdesc.py, tests: switch to python 3 3 years ago

README

About OsmoMSC
=============

OsmoMSC is an implementation of the 3GPP MSC (Mobile Switching Centre)
network element. It implements the following core functionality within
the 2G (GSM) and 3G (UMTS) networks:

* mobility management
* call control (either via built-in MNCC handler or external osmo-sip-connector)
* USSD (exposed via GSUP)
* SMS (either via built-in SMSC or external via GSUP)

Historically, OsmoMSC 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.

OsmoMSC was one of the parts split off from the old openbsc.git. Before,
it was the libmsc part of the old OsmoNITB. Since a true A interface and
IuCS for 3G support is available, OsmoMSC exists only as a separate
standalone entity.

OsmoMSC exposes
- GSUP towards OsmoHLR (or a MAP proxy);
- A over IP towards a BSC (e.g. OsmoBSC);
- IuCS towards an RNC or HNB-GW (e.g. OsmoHNBGW) for 3G voice;
- MNCC (Mobile Network Call Control derived from GSM TS 04.07);
- SMPP 3.4 (Short Message Peer-to-Peer);
- The Osmocom typical telnet VTY and CTRL interfaces.

Find OsmoMSC issue tracker and wiki online at
https://osmocom.org/projects/osmomsc
https://osmocom.org/projects/osmomsc/wiki