Structure of a GSM system & Related Abbreviation

 

Related Abbreviation

TE          Terminal Equipment
SIM       Subscriber Identity Module
BTS       Base Transceiver Station
LOS       Line Of Signal
NLOS    Non Line Of Signal
BSC       Base Station Controller
PCU       Packet Control Unit
MSC      Mobile switch Center
VLR       Visitor Location Register
PSTN     Public Switched Telephone Network
HLR       Home Location Register
AUC      Authentication Center
EIR        Equipment Identity Register
GPRS    General Packet Radio Service
EDGE    Enhanced Data rate for GSM Evolution
SGSN    Serving GPRS Support Node
GGSN   Gateway GPRS Support Node

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