SIST-TS ETSI/TS 103 765-5 V1.0.0:2026

• Abstract:

  The present document specifies the UE capabilities applicable to an On-Board FRMCS Radio Module. NOTE: The present document does not specify UE capabilities applicable to FRMCS-capable Handhelds and FRMCS-capable Objects.

• Status: Not Published
• Public Enquiry End Date: 30-Sep-2025
• ICS: 33.060.01 - Radiocommunications in general
• ICS: 45.020 - Railway engineering in general
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Oct-2026
• Due Date: 27-Dec-2026
• Ref Project: ETSI TS 103 765-5 V1.0.0 (2025-07) - Rail Telecommunications (RT); Future Railway Mobile Communication System (FRMCS); Building Blocks and Functions; Part 5: User Equipment (UE) capabilities

SIST-TS ETSI/TS 103 765-5 V1.0.0:2026 is the ETSI Technical Specification for Rail Telecommunications (RT), Future Railway Mobile Communication System (FRMCS), Building Blocks and Functions, Part 5. It specifies User Equipment (UE) capabilities for an On-Board FRMCS Radio Module, with requirements focused on TDD frame support, Remote SIM Provisioning (RSP), and a minimum 5G Core Session Management capability. The document is intended for engineers, integrators, and procurement or test teams that need to define what the on-board radio module shall support.

What does SIST-TS ETSI/TS 103 765-5 V1.0.0:2026 specify?

SIST-TS ETSI/TS 103 765-5 V1.0.0:2026 specifies the FRMCS UE capabilities for an On-Board FRMCS Radio Module. The scope is limited to that on-board module and excludes FRMCS-capable Handhelds and FRMCS-capable Objects.

The document is organized into short clauses and one normative annex:

Part	What it covers
Clause 1	Scope
Clause 2	References
Clause 3	Terms, symbols and abbreviations
Clause 4	Onboard FRMCS Radio Module capabilities
Annex A	Reference TDD frame from ECC Recommendation (23)01

Clause 4 is the core of the specification. Annex A provides the TDD frame reference that the on-board module has to follow in band n101.

What are the key requirements of SIST-TS ETSI/TS 103 765-5 V1.0.0:2026?

The main requirements are in Clause 4 and Annex A. They define a narrow set of capabilities for the on-board radio module and point implementers to external specifications for the detailed procedures.

TDD frame support in band n101

Clause 4.1.1 requires an Onboard FRMCS Radio Module to support the reference TDD frame in Annex A for TDD operation in band n101. In practice, this means the radio timing has to match the specified downlink, guard period, and uplink sequence.

Clock alignment and frame timing

Annex A requires the reference clock to be aligned with UTC and properly monitored so local clock drift does not exceed the stated limit during a PRTC outage. GNSS is given as an example of a compliant Primary Reference Time Clock (PRTC). For implementers, this means timing design and monitoring are part of the radio module integration, not an afterthought.

Compatible NR timing structure

Annex A ties the frame to NR timing using the basic time unit Tc from ETSI TS 138 211. It also notes that different Subcarrier Spacing (SCS) values are acceptable if the frame still meets the required timings and avoids downlink/uplink overlap. That gives implementers flexibility, but only within the timing envelope defined by the annex.

FRMCS profile management with eUICC and RSP

Clause 4.1.2 requires an eUICC that complies with GSMA SGP.21 and SGP.22 for Remote SIM Provisioning (RSP). The module has to support profile download, installation, enabling, disabling, and deletion. In practice, this is the lifecycle control needed to manage railway identities and service profiles securely.

ES9+ and ES11 interface support

Clause 4.1.2 also requires support for the ES9+ and ES11 interfaces as defined in GSMA SGP.22. This matters because profile management is not just about having an eUICC - the module also has to speak the specified RSP interfaces.

5G Core Session Management capability

Clause 4.4.2 requires support for at least the 5QI identified in ETSI TS 103 765-1, Table 9.3-1. For readers, this is the minimum session-management quality identifier set that the module has to handle when FRMCS traffic is mapped into the 5G Core.

What terms does SIST-TS ETSI/TS 103 765-5 V1.0.0:2026 define?

• FRMCS (Future Railway Mobile Communication System) - the railway mobile communication system family that this specification supports.
• UE (User Equipment) - the radio equipment at the network edge; here it is the on-board FRMCS radio module.
• eUICC (embedded Universal Integrated Circuit Card) - the secure embedded card used for standardized profile storage and provisioning.
• RSP (Remote SIM Provisioning) - the process used to download and manage eUICC profiles remotely.
• 5QI (5G QoS Identifier) - the identifier used by 5G Core Session Management to classify quality of service.
• TDD (Time Division Duplex) - the duplex method that alternates downlink and uplink in a shared frame structure.
• PRTC (Primary Reference Time Clock) - the timing reference used to keep the module aligned to UTC.
• SCS (Subcarrier Spacing) - the NR spacing parameter used when forming the radio frame.

Who uses SIST-TS ETSI/TS 103 765-5 V1.0.0:2026?

FRMCS radio module designers use this specification to define timing, provisioning, and session capabilities. Railway system integrators use it when they decide what the on-board radio equipment has to support in the train environment.

It is also relevant to eUICC and RSP implementers, test laboratories, and quality or procurement teams. These readers use it to check support for the required TDD frame, verify profile management behavior, and confirm the minimum 5QI-related capability.

What changed in SIST-TS ETSI/TS 103 765-5 V1.0.0:2026 from the previous edition?

The document history identifies V1.0.0 from July 2025 and V1.1.1 published in January 2026. The published version replaces the earlier V1.0.0 July 2025 version.

Which standards are used with SIST-TS ETSI/TS 103 765-5 V1.0.0:2026?

• ETSI TS 138 211 - provides the NR physical channel and modulation basis, including the basic time unit Tc used in Annex A.
• GSMA SGP.21 - provides the RSP architecture used for eUICC profile management.
• GSMA SGP.22 - provides the RSP technical specification, including the ES9+ and ES11 interfaces.
• ETSI TS 103 765-1 - provides the FRMCS Transport Stratum reference, including the 5QI table cited in Clause 4.4.2.
• ETSI TR 103 791 - provides the FRMCS terminology used in Clause 3.
• CEPT ECC Recommendation (23)01 - provides the reference TDD frame basis used by Annex A for the 1900-1910 MHz TDD band.

What does the SIST-TS ETSI/TS 103 765-5 V1.0.0:2026 document contain?

The document contains a short requirement set for an on-board FRMCS radio module, plus one normative annex with the reference TDD frame. The body combines scope, references, terminology, general capabilities, RSP profile management, and a minimal 5G Core Session Management requirement.

Annex A is the most detailed technical part. It gives the clock and frame conditions for the reference TDD structure and explains how compatible NR configurations relate to those timings.

The document also points implementers to external sources for the detailed RSP architecture and the FRMCS 5QI reference. That makes the specification useful as a capability baseline, while the detailed procedures remain in the named companion standards.

Draft ETSI TS 103 765-5 V1.0.0 (2025-07)

TECHNICAL SPECIFICATION
Rail Telecommunications (RT);
Future Railway Mobile Communication System (FRMCS);
Building Blocks and Functions;
Part 5: User Equipment (UE) capabilities

2 Draft ETSI TS 103 765-5 V1.0.0 (2025-07)

Reference
DTS/RT-0087
Keywords
FRMCS, radio, user
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
No representation or warranty is made that this deliverable is technically accurate or sufficient or conforms to any law
and/or governmental rule and/or regulation and further, no representation or warranty is made of merchantability or fitness
for any particular purpose or against infringement of intellectual property rights.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2025.
All rights reserved.
ETSI
3 Draft ETSI TS 103 765-5 V1.0.0 (2025-07)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definition of terms, symbols and abbreviations . 5
3.1 Terms . 5
3.2 Symbols . 6
3.3 Abbreviations . 6
4 Onboard FRMCS Radio Module capabilities. 6
4.1 General capabilities . 6
4.1.1 TDD Frame configuration . 6
4.1.2 FRMCS Profile management . 6
4.2 Radio Access UE capabilities . 6
4.3 5G Core Mobility Management UE capabilities . 7
4.4 5G Core Session Management UE capabilities . 7
4.4.1 Introduction. 7
4.4.2 5QI . 7
Annex A (normative): Reference TDD frame from ECC Recommendation (23)01 . 8
History . 9

ETSI
4 Draft ETSI TS 103 765-5 V1.0.0 (2025-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for
...

ETSI TS 103 765-5 V1.1.1 (2026-01)

TECHNICAL SPECIFICATION
Rail Telecommunications (RT);
Future Railway Mobile Communication System (FRMCS);
Building Blocks and Functions;
Part 5: User Equipment (UE) capabilities

2 ETSI TS 103 765-5 V1.1.1 (2026-01)

Reference
DTS/RT-0087
Keywords
FRMCS, radio, user
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
No representation or warranty is made that this deliverable is technically accurate or sufficient or conforms to any law
and/or governmental rule and/or regulation and further, no representation or warranty is made of merchantability or fitness
for any particular purpose or against infringement of intellectual property rights.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2026.
All rights reserved.
ETSI
3 ETSI TS 103 765-5 V1.1.1 (2026-01)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definition of terms, symbols and abbreviations . 5
3.1 Terms . 5
3.2 Symbols . 6
3.3 Abbreviations . 6
4 Onboard FRMCS Radio Module capabilities. 6
4.1 General capabilities . 6
4.1.1 TDD Frame configuration . 6
4.1.2 FRMCS Profile management . 6
4.2 Radio Access UE capabilities . 6
4.3 5G Core Mobility Management UE capabilities . 7
4.4 5G Core Session Management UE capabilities . 7
4.4.1 Introduction. 7
4.4.2 5QI . 7
Annex A (normative): Reference TDD frame from ECC Recommendation (23)01 . 8
History . 9

ETSI
4 ETSI TS 103 765-5 V1.1.1 (2026-01)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™,
...

SLOVENSKI STANDARD
oSIST-TS ETSI/prTS 103 765-5 V1.0.0:2025
01-september-2025
Železniške telekomunikacije (RT) - Prihodnji sistem radijskih komunikacij za
železnice (FRMCS) - Gradniki in funkcionalnosti - 5. del: Zmogljivosti uporabniške
opreme (EU)
Rail Telecommunications (RT) - Future Railway Mobile Communication System
(FRMCS) - Building Blocks and Functions - Part 5: User Equipment (UE) capabilities
Ta slovenski standard je istoveten z: ETSI TS 103 765-5 V1.0.0 (2025-07)
ICS:
33.060.01 Radijske komunikacije na Radiocommunications in
splošno general
45.020 Železniška tehnika na Railway engineering in
splošno general
oSIST-TS ETSI/prTS 103 765-5 en
V1.0.0:2025
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST-TS ETSI/prTS 103 765-5 V1.0.0:2025

oSIST-TS ETSI/prTS 103 765-5 V1.0.0:2025
Draft ETSI TS 103 765-5 V1.0.0 (2025-07)

TECHNICAL SPECIFICATION
Rail Telecommunications (RT);
Future Railway Mobile Communication System (FRMCS);
Building Blocks and Functions;
Part 5: User Equipment (UE) capabilities

oSIST-TS ETSI/prTS 103 765-5 V1.0.0:2025
2 Draft ETSI TS 103 765-5 V1.0.0 (2025-07)

Reference
DTS/RT-0087
Keywords
FRMCS, radio, user
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
No representation or warranty is made that this deliverable is technically accurate or sufficient or conforms to any law
and/or governmental rule and/or regulation and further, no representation or warranty is made of merchantability or fitness
for any particular purpose or against infringement of intellectual property rights.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2025.
All rights reserved.
ETSI
oSIST-TS ETSI/prTS 103 765-5 V1.0.0:2025
3 Draft ETSI TS 103 765-5 V1.0.0 (2025-07)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definition of terms, symbols and abbreviations . 5
3.1 Terms . 5
3.2 Symbols . 6
3.3 Abbreviations . 6
4 Onboard FRMCS Radio Module capabilities. 6
4.1 General capabilities . 6
4.1.1 TDD Frame configuration . 6
4.1.2 FRMCS Profile management . 6
4.2 Radio Access UE capabilities . 6
4.3 5G Core Mobility Management UE capabilities . 7
4.4 5G Core Session Management UE capabilities . 7
4.4.1 Introduction. 7
4.4.2 5QI . 7
Annex A (normative): Reference TDD frame from ECC Recommendation (23)01 . 8
History . 9

ETSI
oSIST-TS ETSI/prTS 103 765-5 V1.0.0:2025
4 Draft ETSI TS 103 765-5 V1.0.0 (2025-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or regis
...