Glossary

APN - Access Point Name
DfT - Department for Transport
GEM - Global Estate Manager
GGSN - Gateway GPRS Support Node
GPRS - General Packet Radio Service
HLR Home Location Register

IP - Internet Protocol

IPSec - Internet Protocol Security
M2M - Machine to Machine
MNO- Mobile Network Operator

PCI DSS - Payment Card Industry Data Security Standard
RTIG - Real Time Information Group
SIM - Subscriber Identity Module
VPN - Virtual Private Network