The Mobile Switching Center (MSC) is the heart of 2G/3G circuit-switched services. It terminates the A-interface links from the Base Station Controllers (BSC) and handles the MM and CC sub-layers of the Layer 3 protocol from the phones (MS).
This Osmocom implementation of the MSC handles A interfaces via 3GPP AoIP in an ASP role. It furthermore implements IETF MGCP against an external media gateway, such as OsmoMGW. It does not implement MAP towards a HLR, but the much simpler Osmocom GSUP protocol, which can be translated to MAP if needed.
| Package Version | Update ID | Released | Package Hub Version | Platforms | Subpackages |
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| 1.8.0-bp155.1.9 info | GA Release | 2023-05-22 | 15 SP5 |
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| 1.6.1-bp154.1.38 info | GA Release | 2022-05-12 | 15 SP4 |
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| 1.6.1-bp153.1.19 info | GA Release | 2021-03-13 | 15 SP3 |
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| 1.6.1-bp152.1.18 info | GA Release | 2020-04-17 | 15 SP2 |
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| 1.3.1-bp151.1.1 info | GA Release | 2019-06-18 | 15 SP1 |
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