PSP
Principal Supply Point
ASP
Auxiliary Supply Point
REB
Relocatable Equipment Building
TFM
Trackside Functional Module
DLM
Data Link Module
IPLS
Independent Position Light Shunting Signal
LOS
Limit of Shunt
PLJI
Position Light Junction Indicator
SI
Standard Indicator
MI
Miniature Indicator
FSP
Functional Supply Point
LAP
Location Area Plan
HMI
Human Machine Interface
RRI
Route Relay Interlocking
SSI
Solid State Interlocking
TPWS
Train Protection and Warning System
AWS
Automatic Warning System
ERTMS
European Rail Traffic Management System
IECC
Integrated Electronic Control Centre
PPM
Panel Processor Module
MPM
Multi Processor Module