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ITU-T Liaison Statements
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ITU-T Liaison Statements
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Incoming liaison statements allocated to an ITU-T Study Group meeting (
*
)
ITU-T Study Group
Any
ITU-T TSAG [Telecommunication Standardization Advisory Group]
ITU-T SG2 [Operational aspects of telecommunications and ICTs]
ITU-T SG3 [Tariff and accounting principles and international telecommunication/ICT economic and policy issues]
ITU-T SG5 [Environment, climate action, circular economy and electromagnetic fields]
ITU-T SG11 [Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices]
ITU-T SG12 [Performance, quality of service (QoS) and quality of experience (QoE)]
ITU-T SG13 [Future networks and emerging network technologies]
ITU-T SG15 [Networks, technologies and infrastructures for transport, access and home]
ITU-T SG17 [Security]
ITU-T SG20 [Internet of Things, digital twins and smart sustainable cities and communities]
ITU-T SG21 [Technologies for multimedia, content delivery and cable television]
Meeting
Geneva, 9-18 September 2026
Geneva, 4-13 February 2026
Geneva, 25 August - 5 September 2025
Geneva, 5-14 February 2025
Geneva, 19-28 June 2024
E-Meeting, 11 March 2024
Geneva, 8-17 November 2023
E-Meeting, 13-22 March 2023
Geneva, 16-20 May 2022
E-Meeting, 8-19 November 2021
E-Meeting, 31 May - 11 June 2021
E-Meeting, 18 December 2020
E-Meeting, 7-8 September 2020
E-Meeting, 27 May - 5 June 2020
Geneva, 4-13 December 2019
Geneva, 19-28 February 2019
Geneva, 4-13 July 2018
Geneva, 27 November - 1 December 2017
Geneva, 29 March - 7 April 2017
Geneva, 14-23 September 2016
Geneva, 20-29 January 2016
Geneva, 18-27 March 2015
Geneva, 28 May - 6 June 2014
Geneva, 17-26 September 2013
Geneva, 22-31 January 2013
Geneva, 21-29 March 2012
Geneva, 1-10 June 2011
Geneva, 9-18 November 2010
Geneva, 17-21 May 2010
Geneva, 16-24 November 2009
Geneva, 24 March - 2 April 2009
Geneva, 23 September 2008
Geneva, 6-15 May 2008
Geneva, 30 October - 8 November 2007
Geneva, 27-31 August 2007
Geneva, 30 January - 8 February 2007
Geneva, 3-11 May 2006
Type of action
Any
Action
Comment
Information
With title containing all these words
Full search in ITU-T LSs Database
Total found:
128
Page Size:
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JCA-MV-LS3
- [
https://www.itu.int/ifa/t/2025/ls/jca-mv/sp18-jca-mv-00003.docx
]
LS on Request for Further Input to the Metaverse Standardization Roadmap and Invitation to Nominate Representatives to ITU-T JCA-MV
Approved on 2026-08-25
.
For action to:
All questions
For information to:
-
Deadline:
2026-11-19
Submitted as:
T25-SG02-260909-TD-GEN-0526
Meeting:
Geneva, 9-18 September 2026
SG3-LS17
- [
https://www.itu.int/ifa/t/2025/ls/sg3/sp18-sg3-00017.docx
]
LS/r on initiation of new work item M.cedco “Cost-effectiveness evaluation of data center operation” in Q6/2 (reply to SG2-LS76)
Approved on 2026-08-05
in response to
SG2-LS76
.
For action to:
-
For information to:
Q6/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0514
Meeting:
Geneva, 9-18 September 2026
FG-AINN-LS8
- [
https://www.itu.int/ifa/t/2025/ls/fg-ainn/sp18-fg-ainn-00008.docx
]
LS on revised FG-AINN Draft Deliverables
Approved on 2026-07-23
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0515
Meeting:
Geneva, 9-18 September 2026
SG11-LS149
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00149.zip
]
LS on initiation of new work item Q.SCid-SA “Signalling architecture of self-controlled identity based on blockchain in future networks”
Approved on 2026-07-22
.
For action to:
-
For information to:
Q5/2; Q6/2; Q7/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0517
Meeting:
Geneva, 9-18 September 2026
SG11-LS150
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00150.zip
]
LS on work progress on quantum key distribution network (QKDN) in SG11
Approved on 2026-07-22
.
For action to:
-
For information to:
Q5/2; Q6/2; Q7/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0518
Meeting:
Geneva, 9-18 September 2026
SG11-LS151
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00151.zip
]
LS on the determination of draft new Recommendation ITU-T Q.3070 (ex Q.TSCA) “Requirements for issuing End-Entity and Certification Authority public key certificates for enabling trustable signalling interconnection between network entities”
Approved on 2026-07-22
.
For action to:
-
For information to:
Q1/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0519
Meeting:
Geneva, 9-18 September 2026
SG11-LS153
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00153.zip
]
LS on the initiation of new work item Q.Sup.IGF-CFC “Implementation guideline framework on combating fraudulent communications using digital public-key certificates”
Approved on 2026-07-22
.
For action to:
-
For information to:
Q1/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0520
Meeting:
Geneva, 9-18 September 2026
SG11-LS154
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00154.zip
]
LS/r on consent of draft new Recommendation ITU-T Q.3067 (ex Q.Req_Frame_RRDN) “Requirements and framework for network-based rapid response to disaster caused by natural hazards” (reply to ITU-D Q3/1-1/103-LS6)
Approved on 2026-07-22
in response to
ITU-D Q3/1-1/103-LS6
.
For action to:
-
For information to:
Q3/2; Q5/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0521
Meeting:
Geneva, 9-18 September 2026
SG11-LS155
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00155.zip
]
LS on initiation of new work item Q.CPNG-DI “Architecture and signalling requirements of computing power network gateway supporting distributed inference”
Approved on 2026-07-22
.
For action to:
-
For information to:
Q5/2; Q6/2; Q7/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0522
Meeting:
Geneva, 9-18 September 2026
SG11-LS156
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00156.zip
]
LS on initiation of new work item Q.MP-CEC “Monitoring parameters and methods in future networks for Computing power and Electric power Coordination”
Approved on 2026-07-22
.
For action to:
-
For information to:
Q5/2; Q6/2; Q7/2
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0523
Meeting:
Geneva, 9-18 September 2026
SG11-LS157
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00157.docx
]
LS/r on the ongoing work on draft Recommendation L.CP on Standardized terminology for Computing power and Electric power Coordination” (reply to SG5-LS62)
Approved on 2026-07-22
in response to
SG5-LS62
.
For action to:
-
For information to:
Q5/2; Q6/2; Q7/2
Deadline:
2026-12-31
Submitted as:
T25-SG02-260909-TD-GEN-0524
Meeting:
Geneva, 9-18 September 2026
SG11-LS159
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00159.docx
]
LS/r on information regarding determined Recommendation A.RA "Appointment and operations of registration authorities" (reply to TSAG-LS17)
Approved on 2026-07-22
in response to
TSAG-LS17
.
For action to:
-
For information to:
Q1/2
Deadline:
2027-03-10
Submitted as:
T25-SG02-260909-TD-GEN-0525
Meeting:
Geneva, 9-18 September 2026
SG21-LS194
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00194.docx
]
LS/r on lead study group concept and coordination mechanisms (TSAG-LS21)
Approved on 2026-07-17
in response to
TSAG-LS21
.
For action to:
All questions
For information to:
-
Deadline:
2027-04-01
Submitted as:
T25-SG02-260909-TD-GEN-0503
Meeting:
Geneva, 9-18 September 2026
SG21-LS195
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00195.docx
]
LS/r on a checklist for ITU-T deliverables (TSAG-LS20)
Approved on 2026-07-17
in response to
TSAG-LS20
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0504
Meeting:
Geneva, 9-18 September 2026
SG21-LS197
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00197.docx
]
LS/r on call for updates for pilot projects and reference table of ITU-T Recommendations suitable for C&I testing (SG11-LS63)
Approved on 2026-07-17
in response to
SG11-LS63
.
For action to:
-
For information to:
All questions
Deadline:
2027-04-01
Submitted as:
T25-SG02-260909-TD-GEN-0505
Meeting:
Geneva, 9-18 September 2026
SG21-LS201
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00201.docx
]
LS/r on coordination for Identity Management (SG17-LS108)
Approved on 2026-07-17
in response to
SG17-LS108
.
For action to:
-
For information to:
All questions
Deadline:
2027-04-01
Submitted as:
T25-SG02-260909-TD-GEN-0506
Meeting:
Geneva, 9-18 September 2026
SG21-LS203
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00203.docx
]
LS/r on CCT editorial comments on terms and definitions (SCV-LS111& SCV-LS118)
Approved on 2026-07-17
in response to
SCV-LS111
,
SCV-LS118
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0507
Meeting:
Geneva, 9-18 September 2026
SG21-LS221
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00221.zip
]
LS on initiation of new work item ITU-T F.IOMT “Technical requirements of intelligent operation and maintenance tools for multimedia applications”
Approved on 2026-07-17
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0508
Meeting:
Geneva, 9-18 September 2026
SG21-LS227
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00227.zip
]
LS on initiation of the new work item ITU-T H.FMLS-QMEM “Quality Metrics and Evaluation Methods for Federated Machine Learning Services
Approved on 2026-07-17
.
For action to:
All questions
For information to:
-
Deadline:
2027-04-01
Submitted as:
T25-SG02-260909-TD-GEN-0509
Meeting:
Geneva, 9-18 September 2026
SG21-LS243
- [
https://www.itu.int/ifa/t/2025/ls/sg21/sp18-sg21-00243.zip
]
LS on initiation of new work item ITU-T F.SIVIS-arch "Functional architecture for substation intelligent visual inspection system"
Approved on 2026-07-17
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG02-260909-TD-GEN-0510
Meeting:
Geneva, 9-18 September 2026
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