OsmoMSC » History » Revision 5
Revision 4 (laforge, 10/21/2017 03:12 PM) → Revision 5/19 (laforge, 10/21/2017 03:12 PM)
h1. OsmoMSC OsmoMSC is the Osmocom implementation of a Mobile Switching Center (MSC). It implements the following interfaces: * 3GPP AoIP over M3UA or SUA towards BSCs, for example [[OsmoBSC:]], possibly via a STP like [[OsmoSTP:]] * Osmocom GSUP towards an HLR such as [[OsmoHLR:]] * SMPP v3.4 for external SMS entities (minimal SMSC is built-in) * MGCP for controlling an external Media Gateway like [[OsmoMGW:]] * MNCC for external call-control handlers, such as [[osmo-sip-connector:]] [[osmo-sip-comnnector:]] for SIP trunks * Osmocom VTY interface for configuration + introspection * Osmocom CTRL interface for programmatic access to internal state/configuration {{graphviz_link() digraph G { rankdir = LR; OsmoBTS -> OsmoBSC [label="Abis/IP"]; OsmoBSC -> OsmoMSC [label="3GPP AoIP"]; OsmoMSC -> OsmoHLR [label="GSUP"]; OsmoMSC -> OsmoSIP [label="MNCC"]; OsmoMSC [color=red]; OsmoSIP [label="osmo-sip-connector"]; } }} h2. History OsmoMSC was the result of splitting [[OsmoNITB:]] into three parts during the 2017 NITB-split. Parts of [[OsmoNITB:]] became [[OsmoBSC:]], other parts became [[OsmoHLR:]], while the mobility management, call control and SMS handling became [[OsmoMSC:]]. At the time of the rewrite, the entire MSC and VLR state machines have been properly re-implemented using "osmo-fsm":http://ftp.osmocom.org/api/latest/libosmocore/core/html/group__fsm.html h2. Contact * Contact us via the openbsc@ mailing list, see [[Cellular Infrastructure:Mailing Lists]]. * Contributions are welcome via [[Cellular Infrastructure:Gerrit]]. * Git repository browser at https://git.osmocom.org/osmo-msc