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mobile switching center (MSC)

A Mobile Switching Center (MSC) is the central switching system in digitalcellular networks that performs the telephony switching functions. As a component of the switching subsystem (SSS), the MSC center connects to the mobile stations (MS) located within the MSC area through the radio base control (BSC) and through the base station (BS).

The MSC Area means the geographical area served by the MSC. In addition, the MSC centre provides the connection to subscribers in fixed networks such as the Public Switched Telephone Network (PSTN) or the ISDN network, to public data networks and some private networks.

Location components of GSM base station

Location components of GSM base station

MSCs consist of ISDN exchanges and handle their communications with exchanges in PSTNs over PCM links, using SS7 signaling. In order to support circuit-switched voice transmission and packet-oriented data transmission in General Packet Radio Service (GPRS), the signalling connections are both circuit- and packet-oriented. The signaling procedures can be performed separately or in combination.

The mobile exchanges have several databases in which the location directory (HLR), the visitor directory (VLR), the equipment database (EIR) and the authentication characteristics (AC) are stored.

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Englisch: mobile switching center - MSC
Updated at: 29.03.2019
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