36 lines
1.4 KiB
Plaintext
36 lines
1.4 KiB
Plaintext
About OsmoMSC
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=============
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OsmoMSC is an implementation of the 3GPP MSC (Mobile Switching Centre)
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network element. It implements the following core functionality within
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the 2G (GSM) and 3G (UMTS) networks:
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* mobility management
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* call control (either via built-in MNCC handler or external osmo-sip-connector)
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* USSD (exposed via GSUP)
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* SMS (either via built-in SMSC or external via GSUP)
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Historically, OsmoMSC originated from the OpenBSC project, which started
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as a minimalistic all-in-one implementation of the GSM Network. In 2017,
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OpenBSC had reached maturity and diversity (including M3UA SIGTRAN and
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3G support in the form of IuCS and IuPS interfaces) that naturally lead
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to a separation of the all-in-one approach to fully independent separate
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programs as in typical GSM networks.
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OsmoMSC was one of the parts split off from the old openbsc.git. Before,
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it was the libmsc part of the old OsmoNITB. Since a true A interface and
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IuCS for 3G support is available, OsmoMSC exists only as a separate
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standalone entity.
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OsmoMSC exposes
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- GSUP towards OsmoHLR (or a MAP proxy);
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- A over IP towards a BSC (e.g. OsmoBSC);
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- IuCS towards an RNC or HNB-GW (e.g. OsmoHNBGW) for 3G voice;
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- MNCC (Mobile Network Call Control derived from GSM TS 04.07);
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- SMPP 3.4 (Short Message Peer-to-Peer);
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- The Osmocom typical telnet VTY and CTRL interfaces.
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Find OsmoMSC issue tracker and wiki online at
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https://osmocom.org/projects/osmomsc
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https://osmocom.org/projects/osmomsc/wiki
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