| Term | Definition |
| CCTV | Closed Circuit Television |
| CCU | Central Control Unit |
| DCS | Depot Control System |
| Disbox | Disconnection Box |
| DPPS | Depot Personnel Protection System |
| EMC | Electromagnetic Compatibility |
| EU | European Union |
| FTN | Fixed Telecommunications Network |
| HD | High Definition |
| HMI | Human-Machine Interface |
| I/P | Input |
| LCD | Liquid Crystal Display |
| LED | Light Emitting Diode |
| LOPS | Locally Operated Point System |
| NR | Network Rail |
| O/P | Output |
| PSP | Points Setting Panel |
| REB | Relocatable Equipment Building |
| RSSB | Rail Safety and Standards Board |
| RSP | Route Setting Panel |
| SIL | Safety Integrity Level |
| SPT | Signal Post Telephone |
| TD | Train Describer |
| TOC | Train Operating Company |
| UPS | Uninterruptible Power Supply |
| Vac | Volts, alternating current |
| Vdc | Volts, direct current |
Forward House
High Street
Henley in Arden
B95 5AA
T: 03300 580180
T: 01926 358428
Click here to subscribe to updates from Fenix Rail Systems
