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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 (IoT) and smart cities and communities (SC&C)]
ITU-T SG21 [Technologies for multimedia, content delivery and cable television]
Meeting
Geneva, 13-24 October 2025
Geneva, 17-28 March 2025
Montreal, 1-12 July 2024
Geneva, 20 November - 1 December 2023
Geneva, 17-28 April 2023
Geneva, 19-30 September 2022
E-Meeting, 6-17 December 2021
E-Meeting, 12-23 April 2021
E-Meeting, 7-18 September 2020
Geneva, 27 January - 7 February 2020
Geneva, 1-12 July 2019
Geneva, 8-19 October 2018
Geneva, 29 January - 9 February 2018
Geneva, 19-30 June 2017
Geneva, 19-30 September 2016
Geneva, 15-26 February 2016
Geneva, 22 June - 3 July 2015
Geneva, 24 November - 5 December 2014
Geneva, 24 March - 4 April 2014
Geneva, 6 December 2013
Geneva, 1-12 July 2013
Geneva, 1 February 2013
Geneva, 10-21 September 2012
Geneva, 11 May 2012
Geneva, 5-16 December 2011
Geneva, 16 September 2011
Geneva, 14-25 February 2011
Geneva, 22 October 2010
Geneva, 31 May - 11 June 2010
Geneva, 15 January 2010
Geneva, 28 September - 9 October 2009
Geneva, 15 May 2009
Geneva, 1-12 December 2008
Geneva, 11-22 February 2008
Geneva, 4-15 June 2007
Geneva, 30 October - 10 November 2006
Geneva, 6-17 February 2006
Type of action
Any
Action
Comment
Information
With title containing all these words
Full search in ITU-T LSs Database
Total found:
95
Page Size:
10
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ITU-R WP 6A-6A/TEMP/76
- [
https://www.itu.int/ifa/t/2025/ls/itu-rwp6a/sp18-itu-rwp6a-iLS-00028.docx
]
LS on developments with low frequency powerline communications
Approved on 2025-03-17
.
For action to:
Q3/15
For information to:
-
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP1-0062
Meeting:
Geneva, 17-28 March 2025
SG13-LS1
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-oLS-00001.docx
]
LS/r on the resolution of AAP comments (TSAG-LS44)
Approved on 2025-03-14
in response to
TSAG-LS44
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0092
Meeting:
Geneva, 17-28 March 2025
SG13-LS4
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-oLS-00004.zip
]
LS on information about the progress of IMT-2030 network studies within SG13
Approved on 2025-03-14
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0095
Meeting:
Geneva, 17-28 March 2025
SG13-LS5
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-oLS-00005.zip
]
LS on initiation of new work item ITU-T Y.cnps “Service model of attestation-assisted credible network path provisioning based on orchestration in future networks”
Approved on 2025-03-14
.
For action to:
-
For information to:
All questions
Deadline:
2025-06-30
Submitted as:
T25-SG15-250317-TD-GEN-0097
Meeting:
Geneva, 17-28 March 2025
SG13-LS6
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-oLS-00006.zip
]
LS on work progress on Quantum Key Distribution (QKD) network in SG13 (as of March 2025)
Approved on 2025-03-14
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0098
Meeting:
Geneva, 17-28 March 2025
IEEE 802.3 Ethernet WG-LS144
- [
https://www.itu.int/ifa/t/2025/ls/ieee802.3ethernetwg/sp18-ieee802.3ethernetwg-iLS-00144.pdf
]
LS/r on 1.6T OTN mapping reference (reply to SG15-LS6)
Approved on 2025-03-13
in response to
SG15-LS6
.
For action to:
-
For information to:
Q11/15
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP3-0080
Meeting:
Geneva, 17-28 March 2025
IEEE 802.3 Ethernet WG-LS145
- [
https://www.itu.int/ifa/t/2025/ls/ieee802.3ethernetwg/sp18-ieee802.3ethernetwg-iLS-00145.pdf
]
LS/r on OTNT Standardization Work Plan (reply to SG15-LS135)
Approved on 2025-03-13
in response to
SG15-LS135
.
For action to:
Q12/15
For information to:
-
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP3-0081
Meeting:
Geneva, 17-28 March 2025
IEEE 802.3 Ethernet WG-LS146
- [
https://www.itu.int/ifa/t/2025/ls/ieee802.3ethernetwg/sp18-ieee802.3ethernetwg-iLS-00146.pdf
]
LS/r on ANT Standardization Work Plan (reply to SG15-LS115)
Approved on 2025-03-13
in response to
SG15-LS115
.
For action to:
Q2/15
For information to:
-
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP1-0061
Meeting:
Geneva, 17-28 March 2025
SG13-LS2
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-oLS-00002.docx
]
LS/r on FG-MV deliverables: allocation and guidance for future work (TSAG-LS46)
Approved on 2025-03-10
in response to
TSAG-LS46
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0093
Meeting:
Geneva, 17-28 March 2025
SG13-LS3
- [
https://www.itu.int/ifa/t/2025/ls/sg13/sp18-sg13-oLS-00003.docx
]
LS on up-dated JCA-ML Terms of Reference and the name
Approved on 2025-03-10
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0094
Meeting:
Geneva, 17-28 March 2025
JCA-IMT2020-LS16
- [
https://www.itu.int/ifa/t/2025/ls/jca-imt2020/sp18-jca-imt2020-oLS-00016.docx
]
LS on Invitation to update the information in the IMT-2020 and beyond roadmap
Approved on 2025-03-05
.
For action to:
All questions
For information to:
-
Deadline:
2025-07-04
Submitted as:
T25-SG15-250317-TD-GEN-0084
Meeting:
Geneva, 17-28 March 2025
OIF-LS63
- [
https://www.itu.int/ifa/t/2025/ls/oif/sp18-oif-iLS-00063.pdf
]
LS on publication of white paper: “Digital Twin Optical Network as an Enhanced Network Operation”
Approved on 2025-03-05
.
For action to:
-
For information to:
Q12/15; Q14/15
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP3-0079
Meeting:
Geneva, 17-28 March 2025
FOSA-LS1
- [
https://www.itu.int/ifa/t/2025/ls/fosa/sp18-fosa-iLS-00001.pdf
]
LS on Recommendation ITU-T G.dfos "Distributed Fibre Optic Sensing System for Terrestrial Optical Transmission System"
Approved on 2025-03-04
.
For action to:
All questions
For information to:
-
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0087
Meeting:
Geneva, 17-28 March 2025
IEC TC 86 SC 86A-LS7
- [
https://www.itu.int/ifa/t/2025/ls/iectc86sc86a/sp18-iectc86sc86a-iLS-00007.docx
]
LS on further harmonization work with ITU-T on single-mode fibres
Approved on 2025-03-04
.
For action to:
Q5/15
For information to:
-
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP2-0062
Meeting:
Geneva, 17-28 March 2025
SG11-LS7
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-oLS-00007.zip
]
LS on work progress on quantum key distribution network (QKDN) in SG11
Approved on 2025-02-28
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0081
Meeting:
Geneva, 17-28 March 2025
SG11-LS23
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-oLS-00023.docx
]
LS/r on the resolution of AAP comments (reply to TSAG-LS44)
Approved on 2025-02-28
in response to
TSAG-LS44
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0082
Meeting:
Geneva, 17-28 March 2025
SG11-LS24
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-oLS-00024.docx
]
LS/r on SG11 preparation for WTSA-24 (reply to SG15-LS129)
Approved on 2025-02-28
in response to
SG15-LS129
.
For action to:
-
For information to:
All questions
Deadline:
-
Submitted as:
T25-SG15-250317-TD-GEN-0083
Meeting:
Geneva, 17-28 March 2025
SG11-LS25
- [
https://www.itu.int/ifa/t/2025/ls/sg11/sp18-sg11-oLS-00025.docx
]
LS/r on draft Recommendation ITU-T Q.FGNS “Signalling requirements for fine-grained network slicing orchestration and management in bearer networks” (reply to SG15-LS128)
Approved on 2025-02-28
in response to
SG15-LS128
.
For action to:
-
For information to:
Q12/15
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP3-0077
Meeting:
Geneva, 17-28 March 2025
IETF-LS28
- [
https://www.itu.int/ifa/t/2025/ls/ietf/sp18-ietf-iLS-00028.docx
]
LS/i on Input for OTNT Standardization Work Plan Issue 34 (reply to SG15-LS135)
Approved on 2025-02-27
.
For action to:
-
For information to:
Q12/15
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP3-0078
Meeting:
Geneva, 17-28 March 2025
OpenROADM MSA-LS6
- [
https://www.itu.int/ifa/t/2025/ls/openroadmmsa/sp18-openroadmmsa-iLS-00006.docx
]
LS/r on OpenROADM (reply to SG15-LS2)
Approved on 2025-02-26
.
For action to:
-
For information to:
Q6/15
Deadline:
-
Submitted as:
T25-SG15-250317-TD-WP2-0037
Meeting:
Geneva, 17-28 March 2025
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