rewrite README

Change-Id: I2bdcf42c2f3340fe0d33ecd85368904312127cb9
Neels Hofmeyr 5 years ago
parent 458aa74c1e
commit e428a4968e
  1. 59

@ -1,39 +1,24 @@
About OpenBSC
About OsmoMSC
OpenBSC started as a minimalistic all-in-one implementation of the GSM Network,
with particular emphasis on the functionality typically provided by the BSC,
MSC, HLR, VLR and SMSC. Today it is a growing suite of libraries and programs,
implementing protocol stacks and functional elements, including
* OsmoBSC - a pure GSM BSC, speaking Abis/IP to the BTS and A/IP to the MSC
* OsmoBSC-MGCP - MGCP helper to the OsmoBSC software
* OsmoNITB - a BSC+MSC+VLR+HLR+SMSC "Network in the box".
* OsmoMSC - a voice CN with A/IP and IuCS/IP towards the BSC and/or HNB-GW
* OsmoSGSN - a GPRS SGSN with Gb/IP and IuPS/IP towards the PCU and/or HNB-GW
* Osmo-GbProxy - a Proxy to aggregate many Gb links as one Gb link to the SGSN
* OsmoBSCNAT - a gateway aggregating many A links as one A link to the MSC
* OsmoGTPHUB - a hub aggregating many GTP links (between SGSN and GGSN)
* ipaccess-utils - some tools to discover + configure ip.access nanoBTS
* bs11_config - a tool to configure the Siemens BS-11 microBTS
Various interfaces towards the BTS are supported, among which are:
* Classic A-bis over E1 using a mISDN based E1 interface. In other
words, you can connect existing GSM Base Transceiver Station (BTS)
through E1 to OpenBSC. So far, we have made it work with the Siemens BS-11,
various Ericsson RBS2xxx BTS models and the Nokia MetroSite.
* A-bis over IP as used by the ip.access nanoBTS product family as well as
the Open Source OsmoBTS software (by the same authors as OpenBSC). OsmoBTS
in turn supports various transceiver hardware, including the sysmoBTS
product family, as well as SDR transceivers supported by OsmoTRX, such as
the UmTRX or USRP boardss.
* IuCS and IuPS over IP towards an HNB-GW (see osmo-iuh) for UMTS (3G)
voice and data links.
Find OpenBSC online at
Harald Welte <>
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