Railway Consultancy Abbreviations and Acronyms

1. OCL
   Operational Communications Link
2. OCS
   Onegcontrol Switch
3. OCU
   Operator’s Controk Unit
4. OETR
   Outline Engineering Train Requirements
5. OFN
   Optical Fibre Network
6. OHL
   Overhead Line
7. OHNS
   Overhead Line Neutral Section
8. OLBI
   Off-Line Battery Inverter
9. OLEAR
   Overhead Line Equipment Asset Register
10. OLEMI
    Overhead Line Equipment Master Index
11. OOR
    Out of Round
12. OPM
    Operational Planning Manager
13. OPUG
    Other Passengtr Upgrades
14. ORN
    Overlay Radio Network
15. OSG
    Operation Safety Group
16. OSGR
    Ordnance Survey Grid Reference
17. OTM
    Overhead-Line Traction Maintenance
18. OTMR
    On Train Monitbring Recorder
19. PABS
    Passenger Track Access Billing System
20. PAC
    Platform Ato Communicator

Last updated: January 4, 2020 — Total entries: 685