Abbreviations in Signal and Telecom Department Indian Railways| S&T Department Important Abbreviations

Abbreviations in Signal and Telecom Department Indian Railways| S&T Department Important Abbreviations

The Signal and Telecom (S&T) Department of Indian Railways plays a crucial role in maintaining the signaling system, telecommunications, and overall train control. The department ensures safe and smooth operation by overseeing signaling equipment, communication systems, and train control measures. Below is a list of important abbreviations used within the Signal and Telecom department:

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Abbreviations in Signal and Telecom Department

1. S&T - Signal and Telecommunication
2. TTR - Traffic Train Recorder
3. RRI - Route Relay Interlocking
4. VHF - Very High Frequency
5. GSM-R - Global System for Mobile Communications – Railway
6. ETCS - European Train Control System
7. TDS - Track Detection System
8. SM - Signal Master
9. LC - Level Crossing
10. MFR - Master Failure Relay
11. PTS - Point and Track Section
12. SSB - Solid State Block
13. ATP - Automatic Train Protection
14. ATS - Automatic Train Supervision
15. GSM-R - Global System for Mobile Communications - Railway
16. MPT - Multi-Point Telephone
17. DTU - Data Transfer Unit
18. FP - Fire Panel
19. FSS - Fault Surveillance System
20. CSB - Centralized SSB Block
21. TDR - Train Describer Relay
22. IRR - Indian Railway Rules
23. BPC - Block Post Controller
24. IMR - Interlocking Master Relay
25. CMI - Central Monitoring Interface
26. OCC - Operation Control Center
27. CIB - Circuit Identification Block
28. LC Gate - Level Crossing Gate
29. TTC - Train Ticketing System
30. RBC - Route Based Controller
31. CISF - Central Industrial Security Force (responsible for security of telecom and signaling installations)
32. IP-based System - Internet Protocol-based System
33. CCTV - Closed Circuit Television
34. DYNALINK - Dynamic Link
35. CRT - Cathode Ray Tube (used in older signaling and communication devices)
36. STP - Signal Testing Protocol
37. TSS - Track Switching System
38. DCS - Distributed Control System
39. RTU - Remote Terminal Unit
40. STL - Signal Transmission Line
41. VCD - Visual Control Display
42. RCC - Railway Control Center
43. SMS - Signal Maintenance Supervisor
44. DLB - Double Line Block
45. MTR - Magnetic Track Relay
46. ADCP - Automatic Data Collection Point
47. TRO - Telecommunication Relay Office
48. LCS - Line Communication System
49. PBX - Private Branch Exchange (used in telecom infrastructure)
50. SIS - Signal Interlocking System
51. RSI - Relay Switch Interlocking
52. JCB - Junction Control Board
53. OLR - Online Relay
54. NRD - National Railway Database
55. GFI - Ground Fault Indicator
56. DCS - Distributed Control System
57. HMI - Human-Machine Interface
58. RAT - Remote Access Terminal
59. TELE - Telecommunication
60. PTZ - Pan-Tilt-Zoom (camera)
61. ATP - Automatic Train Protection
62. TDR - Train Data Recorder
63. RSS - Receiver Station System

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Additional Key Abbreviations Specific to Train Signaling and Control

• AFC - Automatic Fare Collection
• ARPM - Automatic Route Selection and Protection Mechanism
• BPC - Block Protection Controller
• CBTC - Communication-Based Train Control
• ISU - Interlocking Station Unit
• LMT - Line Maintenance Team
• MPC - Master Point Controller
• NFC - Near Field Communication (technology used for quick communication)
• OGS - On-Grade Signaling
• RBC - Route Based Controller
• SGS - Signal Guarding System
• SRS - Signal Relay Switch
• TIU - Track Inspection Unit
• VHF - Very High Frequency Radio