Abbreviations used in Signal & Telecommunication department
Total Items: 71
MTRC: Mobile Train Radio Communication
NMS: Network Management System
OFC: Optical Fibre Cable
PABX: Private Automatic Branch Exchange
PAS: Public Address System
PCM: Pulse Code Modulation
PI: Panel Interlocking
PIDS: Passenger Information Display System
PIS: Passenger Information System
PSTN: Public Switched Telephone Network
RF: Radio Frequency
RRI: Route Relay Interlocking
SDH: Synchronous Digital Hierarchy
SIL: Safety Integrity Level
SLBI: Single Line Block Instrument
SSDAC: Solid State Digital Axle Counter
SSI: Solid State Interlocking
SSTE: Senior Signal and Telecommunication Engineer
STD: Subscriber Trunk Dialling
STM: Synchronous Transfer Module