Glossary

GSM Global System for Mobile Communications

VLR Visitor Location Register

HLR Home Location Register

AUC Authentication center

EIR Equipment Identification

MSC Mobile Switching center

BTS Base Transceiver Station

BSC Base Station Controller

SCP Service control point

SDP Service Data Point

SSF Service Switching Functionality

SMSC Short Message Switching Center

MMSC Multimedia Messaging Service

USSD Unstructured Supplementary Service Data

GPRS General Packet Radio Service

EDGE Enhanced Data Rates for GSM Evolution

SGSN Serving GPRS Support Node

GGSN Gateway GPRS Support Node

HSCSD High-Speed Circuit-Switched Data

IVR Interactive voice response