2023
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
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.