OSS
MS
AuC
VLR
HLR
NSS
BCF
BSS
EIR
MSC
GSM
BSC
BTS
Visitor Location Register
Base Station Controller
Home Location Register
Global System for Mobile Communications
Mobile Station
Base Control Functions
Base Trans Station
Base Station Subsystem
Authentication Center
Mobile Switching Centre
Operation and Support System
Equipment Identity Register
Network Switching System