GSM System Architecture

• Mobile-services Switching Center (MSC)·
• Home Location Register (HLR)·
• Visitor Location Register (VLR)·
• Equipment Identity Register (EIR)·
• Authentication Center (AUC)·
• Base Station System (BSS)-
• Base Transceiver Station (BTS)-
• Base Station Controller (BSC)·
• Mobile Station (MS)·
• Operation and Maintenance Center (OMC)
• Interfaces - A,B,C,D,E,F,G,Um,Abis

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