| Railway Board Circular |
| NCR Circular |
| A | Technical Circular |
| 1 | Technical Circular 01/2025 : Power Supply System for EI installation. |
| 2 | Technical Circular 05/2024: Checklist for Automatic Signalling Works (ABS) Commissioning |
| 3 | Technical Circular 04/2024: Standardization of Power supply arrangement from CLS/Auto changeover panel to IPS installation |
| 4 | Technical Circular 03/2024: Drawings and Registers to be maintained at each stations |
| 5 | Technical Circular 02/2024:Standardization of VDU layout from EI installations. |
| 6 | Technical Circular 01/2024: Different Boards used in Signalling |
| 7 | Technical Circular 01/2023:Cyber security TAN no. EI-TAN-SECURITY |
| 8 | Technical Circular 05/2022: Modifications, Alterations to existing EI stations Hitachi (Ansaldo), Medha & Siemens make. |
| 9 | Technical Circular 04/2022 : Relays |
| 10 | Technical Circular 03/2022:Maintenance of Glued joints |
| 11 | Technical circular No. 02/2022 : Pre-commissioning Joint Check list for Signalling Installation |
| 12 | Revised Technical Circular No. 01/2022 : Guidelines for Testing EI system before commissioning |
| B | Maintenance Circular |
| 1 | Maintenance Circular No. 02/2025 : Maintenance and monitoring of Signalling Fiber laid over section. |
| 2 | Maintenance Circular No. 01/2025 : Auto resetting/Manual resetting of AXLE Counter. |
| 3 | Maintenance Circular No. 05/2024 : Maintenance Schedule of Electronic Interlocking System having Inbuilt Block Panel. |
| 4 | Maintenance Circular No. 04/2024: Minimum technical work should know by Technician/Sr. Technician |
| 5 | Maintenance Circular No. 03/2024 : Maintenance guidelines for upkeep of various passwords of EI/Systems. |
| 6 | Maintenance Circular No. 02/2024 : checklist to be followed during maintenance of Automatic Signalling Sections |
| 7 | Maintenance Circular No. 01/2024 : Maintenance of Signalling gear and issue of disconnection memo in failure. |
| 8 | Maintenance Circular No. 08/2023:Maintenance Guidelines for Fire Alarm and Detection System audit inspection. |
| 9 | Maintenance Circular No. 07/2023: Analysis of Relay Contacts & Voltage in Relay Room. |
| 10 | Maintenance Circular No. 06/2023:Maintenance Guidelines for Lightning and Surge Protection System |
| 11 | Maintenance circular No. 05/2023: Signal Maintenance Cards- Asset Register |
| 12 | Maintenance Circular No.04/2023 :Improvement in maintenance practices |
| 13 | Maintenance Circular No. 03/2023:Protocol for Cable meggering and Cable cut cases. |
| 14 | Maintenance Circular No. 02/2023:Maintenance Protocol for Electric Point Machine |
| 15 | Maintenance Circular No.01/2023 : Tool Kit. |
| 16 | Maintenance Circular No 04/2022:TWS Point. |
| 17 | Maintenance Circular No.- 03/2022: IPS |
| 18 | Maintenance Circular No. 02/2022: Data logger Validation, fault logic development, Messaging utilization of analog inputs. |
| 19 | Maintenance Circular No. 01/2022: Relay Voltage |
