GSM System Structure

GSM System Structure
I. Abbreviation list:
- GSM: Global System for Mobile Communications
- NSS: Network Switching Subsystem
- BSS: Base Station Subsystem

- OMC: Operations and Maintenance Center
- PSTN: Public Switched Telephone Network
- MS: Mobile Station
- GMSC: Gateway Mobile Switching Center
- DTI: Data Transfer Interface
- MSC/VLR: Mobile Switching Center / Visitor Location Register
- AuC: Authentication Center
- HLR: Home Location Register
- ILR: Interworking Location Register
- EIR: Equipment Identity Register
- BSC: Base Station Controller
- RBS (or BTS): Radio Base Station or Base Transceiver Station
- A-bis: > Radio interface between BTS and BSC (vender specific)
- Um: > Radio interface between MS and BTS
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II. Vietnamese:
- Cấu trúc mạng 2G, Cấu trúc mạng GSM
- Từ viết tắt trong mạng di động thế hệ thứ 2
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III. Documents, you can (y) download: 

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IV. More than details:
https://www.facebook.com/Telecom.Eng.World
https://www.youtube.com/channel/UCczeKY_91Q6Rqaid0XWOWWA
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