Implementation of Cell Site Router Communication over LTE on Indian Railway - Draft Technical Advisory Note (TAN) - 30 days for comments

Sep 16, 2026

Draft Technical Advisory Note (TAN) for implementing cell site router communication over LTE on Indian Railway is issued for public comments and suggestions for a period of 30 days. The letter requests zonal railways, representatives, and firms to review the draft TAN in the attached format and submit feedback before 10.11.2025. It outlines preparation basis from Railway Board-approved reports and review minutes, and sets technical scope including LTE eNB deployment, backhaul connectivity, interfaces configuration, and IP-MPLS interoperability requirements.

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CategoryLetters

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Pages11

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Draft Technical Advisory Note (TAN) for Comments

Scope and Basis for Preparation

Interfaces Configuration and Interoperability

No.: RDSO-TELE0LKO(TECH)/12/2025-S and T Directorate Date: As signed 1. All PCSTE of Zonal Railways. 2. Director General, IRISET, Tarnaka Road, Lallaguda (P.O. ), Secunderabad – 500017 Sub.: Draft Technical Advisory Note (TAN) for “Implementation of Cell Site Router Communication over LTE on Indian Railway”. Draft Technical Advisory Note (TAN) for “Implementation of Cell Site Router Communication over LTE on Indian Railway” has been prepared. The draft of Document No. STT/TAN/CSR/2025 Version 1.0 D0 has been uploaded on RDSO website ([www.rdso.indianrailways.gov.in](www.rdso.indianrailways.gov.in & 10.100.2.19)[ & 10.100.2.19](www.rdso.indianrailways.gov.in & 10.100.2.19)) for a period of 30 days for comments/suggestions. You are requested to kindly go through the draft TAN and send your valuable comments/ suggestions on this draft TAN only in the attached format before 10.11.2025. This has the approval of PED/S&T. DA: As above. 1~~0~~th Oct 2025 मो. आममर मिमिकीमिदेशक /दूरिंचार-II Mohd. Aamir Siddiqui Director / Telecom-II aamir.siddiquiner@gov.in Mob.:9794863136 491 1690486/2023/O/o ED/Tele-I/RDSO FORMAT FOR COMMENTS/SUGGESTIONS PARTICULAR TO BE FURNISHED BY ZONAL RAILWAY/ INDIVIDUALS/FIRM | SR NO | PARTICULRS/DETAILS | | | | | | --- | --- | --- | --- | --- | --- | | 1. | NAME OF ZR/FIRM/INDIVUDUAL | | | | | | 2. | NAME OF REPRESENTATIVE | | | | | | 3. | QUALIFICATION | | | | | | 4. | ADDRESS | | | | | | 5. | CONTACT NO. | | | | | | 6. | EMAIL | | | | | | 7. | PROFESSIONAL EXPERIENCE | | | | | | 8. | MANUFACTURING EXPERIENCE OF ITEM( OR SIMILAR ITEM) ON WHICH COMMENTS ARE OFFERED | | | | | | 9. | TECHNICAL PAPER PUBLISHED IN NATIONAL/INTERNATIONAL JOURNAL IF ANY, DETAILS IN BRIEF | | | | | | 10. | LIST OF REFERENCES FOR TECHNICAL REASONS | | | | | | 11. | COMMENTS/SUGGESTIONS ON SPECIFICATION/STR NO : | | | | | | Sr. No. | Clause No. of RDSO Specification | Clause, as it exists RDSO Specification/ STR | | Clause, as it should read after incorporation of comments/ suggestion in the RDSO Specification/ STR | Proper justification for proposed changes | | 11.1 | | | | | | | 11.2 | | | | | | 91 4346936/2025/O/o Director/Tele-1/RDSO | IMPLEMENTATION OF CELL SITE ROUTER FOR COMMUNICATION OVER LTE | Document No. STT/TAN/CSR/2025
Version 1.0 D0 | | --- | --- | ladsr ,oa nwjlapkj funs”kky; vuqla/kku] vfHkdYi ,oa ekud laxBu] y[kuÅ&226011 SIGNAL & TELECOM DIRECTORATE Research, Design and Standards Organization, Lucknow-226011 IMPLEMENTATION OF CELL SITE ROUTER FOR COMMUNICATION OVER LTE Document No. STT/TAN/CSR/2025 Version 1.0 4346936/2025/O/o Director/Tele-1/RDSO | IMPLEMENTATION OF CELL SITE ROUTER FOR COMMUNICATION OVER LTE | Document No. STT/TAN/CSR/2025
Version 1.0 D0 | | --- | --- | Amendment History: | S.
No. | Date of Amendment | Version | Reason for Amendment | | --- | --- | --- | --- | | 1 | XX.XX.2025 | 1.0 | First issue.
TAN was issued in reference to Railway Board Letter No. Dated XX.XX.2025 . Approved by PED/Telecom at Note\#XX
dated in e-Office file No. RDSO
TELE0LKO(TECH)/8/2020-Telecom Directorate/RDSO dated | 92 I. DOCUMENT CONTROL SHEET | Name | Organization | Function | Level | | --- | --- | --- | --- | | SSE/Telecom | RDSO | Assistant | Assist/Prepare | | ADE/Telecom-II | RDSO | Member | Assist/Prepare, Check | | Dir/Telecom-II | RDSO | Member Secretary | Review, Issue | | ED/Telecom-I | RDSO | Reviewing Authority | Review | | PED/S&T | RDSO | Approving Authority | Approve | 93 4346936/2025/O/o Director/Tele-1/RDSO | IMPLEMENTATION OF CELL SITE ROUTER FOR COMMUNICATION OVER LTE | Document No. STT/TAN/CSR/2025
Version 1.0 D0 | | --- | --- | IMPLEMENTATION OF CELL SITE ROUTER COMMUNICATION OVER LTE ON INDIAN RAILWAY I. This document is prepared on the basis of: 1) Report on IP-MPLS Planning for Core Network, Specification of IP-MPLS Router, Revision in TAN

FAQs

Who is requested to review and provide comments on the draft TAN?

All PCSTE of Zonal Railways, the Director General (IRISET), and other relevant parties are requested to go through the draft TAN and submit comments/suggestions in the attached format.

What is the deadline for submitting comments on the draft TAN?

Comments and suggestions must be sent on the draft TAN in the attached format before 10.11.2025.

What technical requirements are highlighted for LTE cell site router implementation?

The document covers deployment of LTE eNBs with backhaul connectivity, configuration of required interfaces (including optical GbE interfaces), and mandatory IP-MPLS interoperability with routers from multiple OEMs and integration with Railtel’s IP-MPLS network.

Sep 16, 2026

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