| 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 |