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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
28 July - 5 August 2026, Geneva
7 November 2025, Geneva
8-17 April 2025, Geneva
9-18 July 2024, Geneva
10 November 2023, Geneva
1-10 March 2023, Geneva
11 November 2022, Geneva
23-27 May 2022, Geneva
13-17 December 2021, E-Meeting
24-28 May 2021, E-Meeting
24-28 August 2020, E-Meeting
31 March - 9 April 2020, E-Meeting
23 April - 2 May 2019, Geneva
9-18 April 2018, Geneva
5-13 April 2017, Geneva
22 February - 1 March 2016, Geneva
16-20 March 2015, Geneva
26-30 May 2014, Geneva
27-31 May 2013, Geneva
3-7 September 2012, Geneva
16-20 January 2012, Geneva
28 March - 1 April 2011, Geneva
17-21 May 2010, Seoul
21-25 September 2009, Kampala
19-23 January 2009, Geneva
31 March - 4 April 2008, Geneva
2-9 October 2007, Geneva
26-30 March 2007, Geneva
19-27 June 2006, Geneva
Type of action
Any
Action
Comment
Information
With title containing all these words
Full search in ITU-T LSs Database
Total found:
41
Page Size:
10
20
50
100
1
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ITU-D Q1/1-Document 1/99(Rev.1)
- [
https://www.itu.int/ifa/t/2025/ls/itu-dq1_1/sp18-itu-dq1_1-00003.docx
]
LS on continuation of the valuable collaboration
Approved on 2026-04-22
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0161
Meeting:
Geneva, 28 July - 5 August 2026
ITU-D Q5/1-Document 1/106-E
- [
https://www.itu.int/ifa/t/2025/ls/itu-dq5_1/sp18-itu-dq5_1-00005.docx
]
LS on collaboration and updates
Approved on 2026-04-17
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0159
Meeting:
Geneva, 28 July - 5 August 2026
ITU-D Q4/1-1/105-E
- [
https://www.itu.int/ifa/t/2025/ls/itu-dq4_1/sp18-itu-dq4_1-00008.docx
]
LS/r on economic activities (reply to SG3-LS12, SG3-LS9)
Approved on 2026-04-17
in response to
SG3-LS9
,
SG3-LS12
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0160
Meeting:
Geneva, 28 July - 5 August 2026
SG11-LS117
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00117.zip
]
LS on results of the ITU Survey on the use of ITU-T Recommendations in national conformity assessment frameworks, including type approval
Approved on 2026-03-11
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0158
Meeting:
Geneva, 28 July - 5 August 2026
SG11-LS115
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-00115.docx
]
LS/r on new terms and definitions produced in SG21 (reply to SG21-LS164)
Approved on 2026-03-11
in response to
SG21-LS164
.
For action to:
-
For information to:
All questions
Deadline:
2026-07-17
Submitted as:
T25-SG03-260728-TD-GEN-0157
Meeting:
Geneva, 28 July - 5 August 2026
SG13-LS170
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-00170.zip
]
LS on consent of draft new Recommendation ITU-T Y.3541 (ex Y.ecs-reqts) "Edge computing - Functional requirements of edge computing service"
Approved on 2026-02-27
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0151
Meeting:
Geneva, 28 July - 5 August 2026
SG13-LS171
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-00171.zip
]
LS on consent of draft new Recommendation ITU-T Y.3534 (ex Y.FaaS-reqts) “Cloud computing - Functional requirements of function as a service”
Approved on 2026-02-27
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0152
Meeting:
Geneva, 28 July - 5 August 2026
SG13-LS172
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-00172.zip
]
LS on initiation of new work item ITU-T Y.ecsai-reqts “Edge computing – Functional requirements of edge computing service for AI workload"
Approved on 2026-02-27
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0153
Meeting:
Geneva, 28 July - 5 August 2026
JCA-IMT2020/IMT2030-LS19
- [
https://www.itu.int/ifa/t/2025/ls/jca-imt2020_imt2030/sp18-jca-imt2020_imt2030-00019.docx
]
LS on Invitation to update the information in the IMT-2020 and IMT-2030 roadmap
Approved on 2026-02-24
.
For action to:
All questions
For information to:
-
Deadline:
2026-06-15
Submitted as:
T25-SG03-260728-TD-GEN-0154
Meeting:
Geneva, 28 July - 5 August 2026
SG2-LS76
- [
https://www.itu.int/ifa/t/2025/ls/sg2/sp18-sg2-00076.zip
]
LS on initiation of a new work item on ITU-T M.cedco “Cost-effectiveness evaluation of data center operation” in Q6/2
Approved on 2026-02-13
.
For action to:
-
For information to:
Q11/3
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0150
Meeting:
Geneva, 28 July - 5 August 2026
SG2-LS95
- [
https://www.itu.int/ifa/t/2025/ls/sg2/sp18-sg2-00095.docx
]
LS/r on OTT-related definitions (reply to SG3-LS10)
Approved on 2026-02-13
in response to
SG3-LS10
.
For action to:
Q9/3
For information to:
-
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0149
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS26
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00026.docx
]
LS on TSAG proposal for modification on enablers in the draft ITU Strategic Plan for 2028-2031
Approved on 2026-02-11
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0155
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS27
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00027.zip
]
LS on Request for feedback on the identification of needs to increase the support for the modernization of Study Groups
Approved on 2026-02-11
.
For action to:
All questions
For information to:
-
Deadline:
2026-09-30
Submitted as:
T25-SG03-260728-TD-GEN-0156
Meeting:
Geneva, 28 July - 5 August 2026
SCV-LS80
- [
https://www.itu.int/ifa/t/2025/ls/scv/sp18-scv-00080.docx
]
LS on comments on the term “OTT bypass” and its definition developed by ITU-T Study Group 2
Approved on 2026-02-02
.
For action to:
Q9/3
For information to:
-
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0145
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS16
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00016.docx
]
LS/r on Outcomes of the fourth meeting of CWG-SFP (reply to CWG-SFP-LS3)
Approved on 2026-01-30
in response to
CWG-SFP-LS3
.
For action to:
-
For information to:
All questions
Deadline:
2026-04-27
Submitted as:
T25-SG03-260728-TD-GEN-0122
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS18
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00018.zip
]
LS on information on determined ITU-T A.1 "Working methods for study groups of the ITU Telecommunication Standardization Sector"
Approved on 2026-01-30
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0123
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS19
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00019.zip
]
LS on Information on agreed A-series Supplement 4 "Guidelines for remote participation"
Approved on 2026-01-30
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0124
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS20
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00020.zip
]
LS on a checklist for ITU-T deliverables
Approved on 2026-01-30
.
For action to:
All questions
For information to:
-
Deadline:
2027-01-15
Submitted as:
T25-SG03-260728-TD-GEN-0125
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS21
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00021.docx
]
LS on lead study group concept and coordination mechanisms
Approved on 2026-01-30
.
For action to:
All questions
For information to:
-
Deadline:
2027-01-09
Submitted as:
T25-SG03-260728-TD-GEN-0146
Meeting:
Geneva, 28 July - 5 August 2026
TSAG-LS23
- [
https://www.itu.int/ifa/t/2025/ls/tsag/sp18-tsag-00023.docx
]
LS on the closure of Joint Correspondence Groups on IoT Security (JCG-IoTSec) and Trust (JCG-Trust)
Approved on 2026-01-30
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG03-260728-TD-GEN-0147
Meeting:
Geneva, 28 July - 5 August 2026
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