| 2025 | ||
| 2022/Sig/EI/Policy-Part(1) | 09.05.2025 | Replacement of Panel/RRI by Electronic Interlocking (EI). |
| 2018/SIG/7/6-RVNL/1 | 15.01.2025 | Empowering RVNL for approval of logic & Interface circuits. |
| 2024 | ||
| 2012/Sig/ATSS/Pt. | 14.02.24 | Technical System Application Approval (TSAA) of Electronic Interlocking |
| 2018/Sig/36-SD-1 | 02.08.24 | Standardization of Typical Circuits for Electronic Interlocking (EI) Ver. 3.0 |
| 2023 | ||
| 2020/Sig/18/EI/GEN-Part(2) | 29.08.2023 | Conceptualization of and Advance Version of EI |
| 2012/Sig/ATSS | 27.06.2023 | Compliance of stipulations – TSAA of EI & other sanctions at PCSTEs level. |
| 2012/Sig/ATSS/Pt. | 28.02.2023 | TSAA of Electronic Interlocking |
| 2021/Sig/7/PSUs | 05.01.2023 | MRVC for approval of interface/logic circuit for EIs and PI/RRI |
| 2022 | ||
| 2018/Sig/36-SD/1/Pt | 18.11.2022 | Nomination of Committee member for “Standardization of typical circuits for EI”. |
| 2021 | ||
| 2013/Sig. Vig/01 (Part) | 21.01.2021 | System Improvement in works contract for commissioning of Electronic Interlocking (EI) system. |
| 2021/Sig/25-Conf/5/SSC | 26.02.2021 | Special signal standards committee (SSC)’s meeting for EI. |
| 2020 | ||
| 2012/Sig/ATSS | 10.01.2020 | Technical System Application Approval (TSAA) of Electronic Interlocking (EI) |
| 2020/Sig/35-Policy/4/Interlocking | 04.11.2020 | Provision of isolation for simultaneous reception at stations due to chance in interlocking from std-I to std-II (R) for EI |
| 2013/Sig/01/(pt)Dup | 19.11.2020 | System Improvement in works contract for commissioning of Electronic Interlocking (EI) System |
| 2013/Sig/Vig/01(Part) | 30.12.2020 | System Improvement in works contract for commissioning of Electronic Interlocking (EI) System |
| 2019 | ||
| 2008/Sig/SGF/4/EI/Gen/Pt. | 08.03.2019 | Implementation of recommendations contained in the report to bring “Self Reliance on Electronic Interlocking (EI)”In Indian Railways. |
| 2008/Sig/SGF/4/EI /Gen/Pt.1 |
06.06.2019 | Automation in Signaling Drawing - Self Reliance in Electronic Interlocking (EI) |
| 2010/Sig/SGF/EI (MEDHA) |
06.06.2019 | Medha make EI model MEI 633: (i) Upgradation to executive software to version 1.2(ii) Restoration of Hot Standby mode. |
| 2008/Sig/SGF/4/El/GEN | 28.08.2019 | EI OEMs Organization chart for post commissioning maintenance |
| 2008/Sig/SGF/4/EI/GEN/pt-1 | 04.11.2019 | Automation in Signal Drawing-Self Relince in Electronic Interlocking. |
| 2014/Sig/M/83rd SSC | 11.11.2019 | Block working built into Electronic Interlocking. |
| 2018/Sig/36-SD/1 | 20.11.2019 | Standardization of Typical circuits for Electronic Interlocking. |
| 2008/Sig/SGF/4/EI/GEN | 19.12.2019 | Integrating Train operation into Electronic Interlocking (EI). |
| 2018 | ||
| 2018/Sig/1/Sig-Equip/IPS/1. | 12.01.2018 | Siemens Electronic Interlocking-Provision of newer version power supply card PSU 24. |
| 2011/Sig/EI/Policy. | 22.03.2018 | Review of Electronic Interlocking (EI) Application Data Design for achieving uniformity across approval vendors. |
| 2008/Sig/SGF/4/EI/GN/Pt.1 | 03.08.2018 | Self-Reliance on Electronic Interlocking (EI). |
| 2017 | ||
| STS/L/SSI/General | 10.03.2017 | Implementation of Recommendations contained in the report to bring “Self-Reliance on Electronic Interlocking (RI) in Indian Railways. |
| 2008/Sig/SGF/4/EI/GEN | 19.05.2017 | Non 0bservation of General and Subsidiary Rules while Undertaking yard remodeling. |
| 2013/Sig/IRSET. | 09.08.2017 | Review of Electronic Interlocking (EI) Application Data Design for achieving uniformity across approval vendors. |
| 2016 | ||
| 2003/SIG/G/5 | 28.04.2016 | Policy on type of interlocking to be adopted at stations provided with centralized operation of points and signals. |
| 2008/Sig/SGF/4/EI/Gen/Pt.1 | 16.08.2016 | Implementation of Recommendations contained in the Report to bring “Self-Reliance on Electronic Interlocking (RI) in Indian Railways” |
| 2012/Sig/ATSS | 06.10.2016 | Technical System Application Approval (TSAA) of Advanced Technology Signalling: - EI installations up to 100 routes. |
| 2015 | ||
| 2012/Sig/ATSS | 02.09.2015 | Technical System Application Application approval of Advanced Technology Signaling Systems. |
| 2011/ Sig/EI/Policy | 15.04.2015 | Incorporation of condition or MoU with OEMs (RDSO approved sources) in technical eligibility criteria in tender award of works contract for Electronic Interlocking (EI) |
| 2012/Sig/ATSS | 16.04.2015 | Technical System Application Approval (TSAA) of Advance Technology Signalling System. |
| 2008/Sig/SGF/4/EI | 30.06.2015 | Failure of EI at Purna due to lightning. |
| 2012/Sig/ATSS | 02.09.2015 | Technical System Application Approval (TSAA) of Advance Technology Signalling System. |
| 2012/Sig/ATSS | 26.11.2015 | Signalling Installations at Major Junction Stations (> 100 routes). |
| 2012 | ||
| 2012/Sig/ATSS | 03.05.2012 | Technical System Application Approval (TSAA) of Advance Technology Signalling System. |
| 2010/Sig/SGF/EI(Ansaldo) | 26.12.2012 | Improvement of configuration for Microlok II Electronic Interlocking. |
| 2010 | ||
| 2008/Sig/SGF/4/EI/GEN | 22.07.2010 | Microlock-II Approval of version CC3.0. |
| 2009 | ||
| 2008/SIG/SGF/4/EI/GEN | 29.07.2009 | Provision of Electronic Interlocking System. |
| 2006 | ||
| 2003/Sig/G/5. | 14.09.2006 | Policy on type of interlocking to be adopted at stations provided with centralized operation of points & Signals. |
| 2005 | ||
| 2005/Sig/SGF/4/EI | 01.06.2005 | Improvement in Electronic Interlocking (SSI) Equipment- Micro Lock-II. |
| 2005/Sig/SGF/4/EI | 14.10.2005 | Induction of new technologies for Electronic Interlocking. |
| Source : Ministry of Railways (Railway Board) CMS Team Last Reviewed on: 26-05-2025 | ||