Connecting the world and beyond

Executive Summary

Executive Summary of SG11 meeting (Geneva, 17-26 November 2025)

ITU-T Study Group 11 “Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices” meeting was held in Geneva from 17 to 26 November 2025 and was attended by 188 delegates from 47 countries. List of participants is available in SG11-TD381-R1/GEN.

The webcast was provided for the Study Group 11 opening and closing plenary sessions, i.e., remote participants were able to listen but not to speak. All other sessions were supported by ITU MyMeetings remote participation tool. The remote participation guideline was available on the ITU-T SG11 webpage for Delegates and Moderators. Additional remote participation guidance is contained in SG11-TD385/GEN.

Interpretation was provided in Chinese, English, French, Spanish and Russian at the closing plenary.

Parallel events:

ITU Workshop on “Securing Telephone Networks: Toward collaborative approach for combating fraudulent communications using Digital Certificate”, 17 November 2025, https://itu.int/go/WS-STN;
ITU-T Conformity Assessment Steering Committee (ITU-T CASC), Geneva, 19 and 21 November 2025; more information is available on the CASC webpage (http://itu.int/go/casc);
Bridging the Standardization Gap (BSG) training session, 19 November 2025 (SG11-TD386-R2/GEN);
Orientation session for newcomers, 18 November 2025 (SG11-TD387/GEN).
ETSI TC INT meeting, 18-20 November 2025, more information is available on the ETSI webpage.

This meeting approved one draft Recommendation (Q.5056), consented 17 draft Recommendations, determined two draft Recommendations, agreed two revised and one new Supplements, and one Technical Report, and initiated 18 new work items across signalling, edge computing, testing/monitoring, security, and AI-related domains. Key outcomes include progress on QKDN, signalling security, MEC/confidential computing, SRv6-based SFC/SD-WAN, and digital twin network monitoring.

1 Approved draft Recommendation (TAP, Resolution 1)

The following table shows the “Approved” draft Recommendation according to Resolution 1 of WTSA-22 cl.9.5 (see SG11-TD392-R1/GEN).

It was approved at the SG11 opening plenary on 17 November 2025, following the results of MS consultation (SG11-TD398/GEN).

See TSB Circular 95.

#	Q	Draft new Rec. No.	Title	TD	A.5 Justification
1	15/11	ITU-T Q.5056 (ex Q.FC-MCM)	Framework for combating online Multimedia Content Misappropriation	SG11-R6/GEN	-

2 Determined draft Recommendations (TAP, Resolution 1)

The following table shows the “Determined” draft Recommendations (see SG11-TD392-R1/GEN).
See WP1/11 and WP2/11 reports (SG11-TD434-R1/GEN and SG11-TD435-R1/GEN) and TSB Circular 94.

#	Q	Draft new Rec. No.	Title	TD	A.5 Justification
1	4/11	ITU-T Q.5015 (ex Q.cco-mec)	Signalling requirements for orchestration supporting confidential computing in multi-access edge computing	SG11-TD741/GEN	SG11-TD619/GEN
2	7/11	ITU-T Q.5036 (ex Q.IEC-PDMF)	Data management interfaces for public decision-making framework on Intelligent edge computing	SG11-TD674-R1/GEN	-

3 Draft Recommendations for which Approval is deferred to next SG11 meeting (Geneva, 3-11 March 2026), TAP, Resolution 1

Due to several outstanding issues requiring resolution, at the closing plenary, SG11 decided to defer the approval procedure for determined draft Recommendations ITU-T Q.5010 and ITU-T Q.5055 to next SG11 meeting planned to be held in Geneva from 3 to 11 March 2026. See TSB Circular 95. The following table shows the draft Recommendations for which approval process is deferred to next SG11 meeting.

#	Q	Draft new Rec. No.	Title	TD	A.5 Justification
1	7/11	ITU-T Q.5010 (ex Q.UAMS-SRA)	Signalling requirements and architecture for communication service in urban air mobility environment	SG11-TD808/GEN	-
2	15/11	ITU-T Q.5055 (ex Q.CEIR)	Technical requirement, interfaces and generic functions of a central equipment identity register (CEIR)	SG11-TD754/GEN	-

Note: the title of draft ITU-T Q.5010 was modified during this SG11 meeting.

4 Consented Recommendations (ITU-T A.8)

The following table shows the “Consented” draft Recommendations (see SG11-TD392-R1/GEN). See WP1/11, WP2/11 and WP3/11 reports (SG11-TD434-R1/GEN, SG11-TD435-R1/GEN and SG11-TD436-R2/GEN).

#	Q	Draft new Rec. No.	Title	TD	A.5 Justification
1	1/11	ITU-T Q.5016 (ex Q.FMSC-SA)	Signalling architecture of fixed, mobile and satellite convergence for IMT-2020 networks and beyond	SG11-TD770/GEN	-
2	2/11	ITU-T Q.4165 (ex Q.QKDNi_profr)	Quantum key distribution network interworking - Protocol framework	SG11-TD712/GEN	-
3	2/11	ITU-T Q.3066 (ex Q.DMSA)	Principles for detection and mitigation of signalling attacks in telecommunication networks	SG11-TD713-R1/GEN	SG11-TD767/GEN
4	4/11	ITU-T Q.3065 (ex.Q.SFCO)	Signalling requirements and data models for service function chaining orchestration based on SRv6	SG11-TD743/GEN	SG11-TD819/GEN
5	5/11	ITU-T Q.3744 (ex Q.BNG-SLA)	Signalling requirements for subscriber SLA-based virtual Broadband Network Gateway	SG11-TD672-R1/GEN	-
6	5/11	ITU-T Q.3724 (ex Q.CNCG-IC)	Signalling requirements for intelligent control of the cloud-network-converged network gateway	SG11-TD673/GEN	-
7	6/11	ITU-T Q.5035 (ex Q.IMT2020-PFW)	Protocol Framework for IMT-2020 network interconnection with IMS	SG11-TD651-R1/GEN	-
8	6/11	ITU-T Q.5014 (ex Q.PDN)	Signalling and Protocol for distributed core network in future network	SG11-TD652/GEN	-
9	6/11	ITU-T Q.5034 (ex Q.PIRSO)	Protocol for supporting integrated resource scheduling and orchestration for future network including IMT-2020 networks	SG11-TD653/GEN	-
10	7/11	ITU-T Q.5037 (ex Q.IEC-ERINF)	Data management interfaces in educational robot system with intelligent edge computing	SG11-TD675-R1/GEN	-
11	8/11	ITU-T Q.4106 (ex Q.HP2P-svcfrw)	Hybrid peer-to-peer (P2P) communications: Service framework	SG11-TD790/GEN	SG11-TD616/GEN
12	12/11	ITU-T Q.4080 (ex Q.MUD_IoT)	Framework for testing and monitoring internet of things devices and networks using technical requirements from manufacturer usage description	SG11-TD696-R1/GEN	SG11-TD633/GEN
13	13/11	ITU-T Q.3918 (ex Q.MMPS)	Requirements and Reference Model of minimum monitoring parameter set generation of Multi-modality communication services in Digital Twin Network	SG11-TD676/GEN	-
14	13/11	ITU-T Q.3919 (ex Q.RI_PISRM)	Requirements and reference model of resource integration and protocol independent methods for source routing measurements	SG11-TD678-R1/GEN	SG11-TD622/GEN
15	13/11	ITU-T Q.4081 (ex Q.MMAIM)	Methods and metrics for monitoring Machine Learning/Artificial Intelligent in future networks including IMT-2020	SG11-TD680/GEN	-
16	14/11	ITU-T Q.3921 (ex Q.FSDNT)	Test framework for software-defined networking multi-controller inter-networking using communication segment	SG11-TD765-R1/GEN	-
17	16/11	ITU-T Q.4082 (ex Q.DPI-TR)	Testing requirements for deep packet inspection device	SG11-TD695-R1/GEN	-

5 Supplements, Handbooks, Technical Papers, Guidelines and Corrigenda

5.1 Supplements

The following table shows the “Agreed” Supplements (see SG11-TD392-R1/GEN). See WP1/11 report (SG11-TD434-R1/GEN).

#	Q	Draft new Suppl.	Title	TD
1	3/11	Q.Suppl.69 (ex Q.Supplement.69-Rev)	Framework for interconnection between VoLTE-based network and other networks supporting emergency call	SG11-TD654/GEN
2	3/11	Q.Suppl.72 (ex Q.Supplement.72-Rev)	Signalling requirements for internet protocol multimedia subsystem (IMS) emergency call in support of multiple access	SG11-TD655-R1/GEN
3	4/11	Q.Suppl.79 (ex Q.sup.sdwan-srv6)	Implementation of Software-defined wide area networking (SD-WAN) service based on Segment Routing IPv6 (SRv6)	SG11-TD744/GEN

5.2 Guidelines
No Guidelines were approvedat this meeting.

5.3 Handbooks

No Handbooks were approvedat this meeting.

5.4 Technical Papers / Technical Reports

The following table shows the “Agreed” Technical Report (see SG11-TD392-R1/GEN).

#	Q	Draft new Technical Report	Title	TD
1	13/11	QSTR.MPLRA	Requirements and architecture for monitoring packet loss caused by network congestion	SG11-TD682-R1/GEN

5.5 Corrigenda
No Corrigenda were approved at this meeting.

6 Recommendations/Technical reports/Supplements deleted
No Recommendations/Technical Reports/Supplements were deleted at this meeting.

7 SG11 Structure, Management and Rapporteurs

The current ITU-T SG11 Management is as follow:

SG11 Chair: Tejpal Singh (Ministry of Communications, India)

Vice-chairs:

Uwe BAEDER (Rohde & Schwarz GmbH & Co. KG, Germany)
Kaoru Kenyoshi (NICT, Japan)
Namseok KO (ETRI, Korea, Rep. of)
Cheng Li (China Academy of Information and Communications Technology (CAICT), MIIT, China)
Njeri Mwangi (Communications Authority of Kenya (CA), Kenya)
Paul Najarian (U.S. Department of State, United States)
Salim Nebili (Tunisie Télécom, Tunisia)
Emmanuel Ntambara (Rwanda Utilities Regulatory Authority (RURA), Rwanda)
Doniyor Safarov (Ministry of Digital Technologies of the Republic of Uzbekistan, Uzbekistan)
Mohsene Abdelfettah Tebbi (Algérie Télécom SPA, Algeria)
Kofi Ntim YEBOAH-KORDIEH (National Communications Authority, Ghana)

Note: according to “resolve 7” of Resolution 208 (PP-22), it is noted that Paul NAJARIAN (U.S. Department of State, United States) and Emmanuel NTAMBARA (Rwanda Utilities Regulatory Authority, Rwanda) did not attend the meeting.

There were no changes to the structure of ITU-T SG11.

Ms Rui Xia (China Unicom) was appointed as Associate rapporteur of Q3/11 during SG11 opening plenary.

The current structure of ITU-T SG11, including acting Rapporteurs appointed for this particular meeting is available in SG11-TD396-R1/GEN.

8 Questions

There were no changes to the Questions texts at this meeting.

9 Liaison officers

There were no changes to the list of Liaison Officers at this meeting. The current list can be found in SG11-TD397/GEN.

10 Conformity Assessment Steering Committee

The twenty first meeting of the ITU-T Conformity Assessment Steering Committee (CASC) was held in Geneva on 19 and 21 November 2025 during the ITU-T SG11 meeting. The meeting was chaired by Mr. Anshul Kumar Gupta (CASC Vice-Chair).

The current status of the ITU Testing Laboratories database was presented by TSB (SG11-TD395/GEN). As of November 2025, there are 14 testing laboratories registered in ITU Testing Laboratories database. Since February 2025, several laboratories have undergone accreditation reassessments or renewals and provided updated certificates with extended validity of accreditation. All changes were duly reflected in the ITU TL database (https://itu.int/go/tldb).

The CASC Chair introduced the results of the CASC interim e-meetings held in May and September 2025. Across both meetings, substantial progress was made on developing a comprehensive Questionnaire for ITU members on the use of ITU-T Recommendations in national conformity assessment frameworks and type approval processes.

At this particular meeting, CASC finalized the questionnaire and agreed to conduct a survey on the subject matter. The objective is to identify existing practices and adoption of the ITU-T Recommendations including levels of awareness about specific ISO/IEC standards within testing, certification, and accreditation systems. The collected data will assist the ITU Conformity Assessment Steering Committee (CASC) in evaluating the adoption of international conformity assessment standards and understanding national needs regarding testing laboratories and certification practices in relation to ITU-T Recommendations. The questionnaire is available online at: https://itu.int/go/CASC-QS-2025. The deadline for the feedback is 23 February 2026. The results will be considered at the next SG11 meeting in March 2026. More details are available in TSB Circular 96.

Also, during the May and September interim CASC e-meetings, CASC initiated a collaboration with the International Accreditation Forum (IAF) on establishing certification scheme. Both meetings highlighted the importance of strengthening ITU-IAF coordination to support efficient and globally recognized conformity assessment processes.

Following the discussion at this particular meeting, CASC requests the IAF’s support in exploring the feasibility of conducting a survey across IAF members to assess the current status of Certification Bodies certifying ICT equipment in line with ITU-T Recommendations. Consequently, this would also enable CASC to assess the potential necessity of broadening the current ITU Testing Laboratories Database (https://itu.int/go/tldb), which was created based on ILAC survey and ITU-ILAC partnership, to include Certification Bodies as well. The relevant LS was sent to IAF accordingly (see SG11-LS64).

In addition, TSB introduced the report (SG11-TD606/GEN) which was prepared in accordance with Resolution 177 of PP-22 (Rev. Bucharest, 2022) which instructs TSB Director:

- to develop the criteria for assessing the maturity of Pillar 1 of the Action Plan for the C&I Programme mentioned in recognizing further

j) above and report to the Council;

- to define the ITU Mark concept and its implications for ITU and its membership.

The report prepared by TSB contains an overview of existing conformity programmes, international marks and logos as well as criteria for assessing Pillar 1 of the ITU C&I Programme. It also describes a concept of ITU Mark taking into consideration the existing ITU mark for Global Mobile Personal Communications by Satellite systems (GMPCS).

Following the discussions, CASC participants showed interest on report prepared by TSB and it was decided that TSB should prepare and maintain a list of ITU-T Recommendations which should be considered for ITU Mark concept.

Further, it was noted that the draft report contained in SG11-TD606/GEN require more discussion and review along the comments of ITU-T SG11 members. The contributions are encouraged to be submitted to next ITU SG11 meeting to be held in March 2026.

Finally, CASC decided to request all SGs to provide updates for pilot projects (https://itu.int/go/pilot-projects) and reference table of ITU-T Recommendations suitable for C&I testing (https://itu.int/go/reference-table). The relevant LS was sent out to all SGs.

More details are available in CASC report (SG11-TD418-R1/GEN) and its webpage at: https://itu.int/go/casc.

11 Signalling and protocols

SG11 advanced 50 ongoing work items and initiated 14 new work items on signalling and protocols-related aspects.

Due to several outstanding issues requiring resolution, SG11 decided to defer the approval procedure for determined draft ITU-T Q.5010 to next SG11 meeting planned to be held in Geneva, 3-11 March 2026 (see cl.3 above).

11.1 Broadband Network Gateway signalling

SG11 consented two new draft Recommendations related to Broadband Network Gateway, as follows (see cl.4 above):

Q.3744 (ex Q.BNG-SLA): Signalling requirements for subscriber SLA-based virtual Broadband Network Gateway
Q.3724 (ex Q.CNCG-IC): Signalling requirements for intelligent control of the cloud-network-converged network gateway

Two new draft Recommendations and revision of one existing Recommendation were initiated during this meeting:

Q.BNG-MC: Management and Control Signalling Requirements of Northbound Interface of virtualized Broadband Network Gateway (vBNG)
Q.BNG-NDC: Signalling requirements and procedures for network data caching in vBNG (virtualized Broadband Network Gateway)
Q.4143-rev: Signalling requirements for cloud-based control plane and pooled user plane of virtualized broadband network gateway (vBNG)

11.2 Signalling requirements for emergency telecommunications

SG11 agreed revision of two Supplements (see cl.5 above):

Q.Suppl.69: Framework for interconnection between VoLTE-based network and other networks supporting emergency telecommunications service (ETS)
Q.Suppl.72: Signalling requirements for IP multimedia subsystem (IMS) emergency telecommunications service in support of multiple access

A new draft Recommendation was initiated during this meeting:

Q.IMS-INT-RS: IMS interconnection restoration architecture and procedures

11.3 CPN, edge computing, SFC, SRv6-based SD-WAN service, NICE, big data and media protocols

SG11 determined two new draft Recommendations related to edge computing, as follows (see cl.2 above):

Q.5015 (ex Q.cco-mec): Signalling requirements for orchestration supporting confidential computing in multi-access edge computing
Q.5036 (ex Q.IEC-PDMF): Data management interfaces for public decision-making framework on Intelligent edge computing

consented one new draft Recommendation related to SFC (see cl.4 above):

Q.3065 (ex Q.SFCO): Signalling requirements and data models for service function chaining orchestration based on SRv6

and agreed a new Supplement on SRv6-based SD-WAN service (see cl.5 above):

Q.Suppl.79 (ex Q.sup.sdwan-srv6): Implementation of Software-defined wide area networking (SD-WAN) service based on Segment Routing IPv6 (SRv6)

SG11 started revison of one existing Recommendation and initiated two new work items:

Q.3064-rev: Signalling architecture of network intelligence capability enhancement (NICE) in support of awareness capabilities
Q.DC-SA-Ms: Media session protocols for interfaces on converged media function for data channel enhanced IMS network
Q.bDDN-SA: Signalling architecture of big data driven networking

11.4 Signalling of IMT-2020 and beyond

SG11 consented four new draft Recommendations related to IMT-2020 and beyond, as follows (see cl.4 above):

Q.5016 (ex Q.FMSC-SA): Signalling architecture of fixed, mobile and satellite convergence for IMT-2020 networks and beyond
Q.5035 (ex Q.IMT2020-PFW): Protocol Framework for IMT-2020 network interconnection with IMS
Q.5014 (ex Q.PDN): Signalling and Protocol for distributed core network in future network
Q.5034 (ex Q.PIRSO): Protocol for supporting integrated resource scheduling and orchestration for future network including IMT-2020 networks

Also, SG11 started the following new work items:

QSTR.SP-RCA: Signalling architecture and protocol procedures for service quality degradation root cause analysis in IMT-2020 network and beyond
QSTR.SPACN: Signalling and protocol for AI-agent communication network in IMT-2020 networks and beyond

11.5 Signalling for P2P communications

SG11 consented one new draft Recommendation related to P2P communications, as follows (see cl.4 above):

Q.4106 (ex Q.HP2P-svcfrw): Hybrid peer-to-peer (P2P) communications: service framework

11.6 Signalling for metaverse, robot systems, digital twin

SG11 initiated a new work item on metaverse:

Q.SR-TSM: Signalling requirements for interactions between telepresence suits and avatars in the metaverse

With regard to robot systems, SG11 consented one new draft Recommendation (see cl.4 above):

Q.5037 (ex Q.IEC-ERINF): Data management interfaces in educational robot system with intelligent edge computing

and started two new work items:

Q.IEC-ERS: Signalling requirements and interfaces of educational robot system at intelligent edge computing
Q.DT-SA: Signalling architecture of digital twin network

11.7 QKDN protocols

As a continuation of studies related to signalling protocols for QKDN, ITU-T SG11 consented a new Recommendation:

ITU-T Q.4165 (ex Q.QKDNi_profr): Quantum key distribution network interworking - Protocol framework

and started a new work item:

Q.QKDN_Pro-car: Protocols for cryptographic application registration in quantum key distribution networks

12 Signalling security

Since 2016, ITU-T SG11 continues its studies on implementation of security measures, in particular to use digital public-key certificates in the signalling level in order to cope with different types of attacks on existing ICT infrastructure and services (e.g., OTP intercept, calls intercept, spoofing numbers, robocalls, etc.). More details are available on dedicated webpage at: https://itu.int/go/SIG-SECURITY.

SG11 made a good progress on draft Recommendation Q.TSCA “Requirements for issuing End-Entity and Certification Authority certificates for enabling trustable signalling interconnection between network entities” (SG11-TD722/GEN). SG11 considered a LS from SG2 and provided comments related to their work item E.RAA4QTSCA (see SG11-TD719-R1/GEN).

Also, according to the request of SG11 at its previous meeting held in February 2025, TSB informed SG11 that CA/Browser Forum is not eligible to be qualified under the criteria set forth in Annex B of ITU-T A.5 (2022), because it has no legal status as defined in the bylaws of CA/Browser Forum. The details are available in SG11-TD535/GEN.

During this meeting, SG11 consented one new Recommendation:

ITU-T Q.3066 (ex Q.DMSA): Principles for detection and mitigation of signalling attacks in telecommunication networks

and started revision of Technical Report:

QSTR-USSD-rev: Low resource requirement, quantum resistant, encryption of USSD messages for use in financial services

Also, during this meeting, ITU organized a Workshop on Securing Telephone Networks: Toward collaborative approach for combating fraudulent communications using Digital Certificate (https://itu.int/go/WS-STN). Its aim was to raise awareness about the growing threats posed by fraudulent communications, present current ITU initiatives related to the use of digital public-key certificates for authenticating Calling Line Identification (CLI) and facilitate international collaboration among all interested stakeholders to address this global issue. More details are highlighted in cl.17 below.

ITU-T SG11 continues close collaboration with ITU-T SG17 and ITU-T SG2 on this subject matter and informed them and TSAG via LSs accordingly. During this meeting, Tejpal Singh (SG11 Chair) and Assaf Klinger (Editor of Q.TSCA) gave an interview on this matter which was presented at the SG11 closing plenary.

13 AI/ML related work

During the SG11 opening plenary, TSB presented the ITU Standards Landscape https://www.itu.int/itu-t/landscape particularly AI standards database. Rapporteurs and Editors were encouraged to inform TSB about ongoing work items (WIs) as well as approved Recommendations dealing with AI, highlighting particular values for the AI Industry Vertical and Human AI Activity. These values are to be included in the topic field for each particular WI in the Work Programme Database accordingly.

14 Testing and monitoring specifications

ITU-T SG11 consented six new Recommendations, agreed one Technical Report and started three new work items related to testing and monitoring specifications. SG11 made progress on 14 ongoing work items.

14.1 DPI, IoT and interoperability testing

SG11 consented three new draft Recommendations (see cl.4 above):

Q.4082 (ex Q.DPI-TR): Testing requirements for deep packet inspection device
Q.3921 (ex Q.FSDNT): Test framework for software-defined networking multi-controller inter-networking using communication segment
Q.4080 (ex Q.MUD_IoT): Framework for testing and monitoring internet of things devices and networks using technical requirements from manufacturer usage description

No new work items were started at this meeting.

14.2 Monitoring

SG11 consented three new draft Recommendations and agreed a new Technical Report (see cl.4 and cl.5 above):

Q.3918 (ex Q.MMPS): Requirements and Reference Model of minimum monitoring parameter set generation of Multi-modality communication services in Digital Twin Network
Q.3919 (ex Q.RI_PISRM): Requirements and reference model of resource integration and protocol independent methods for source routing measurements
Q.4081 (ex Q.MMAIM): Methods and metrics for monitoring Machine Learning/Artificial Intelligent in future networks including IMT-2020
QSTR.MPLRA: Requirements and architecture for monitoring packet loss caused by network congestion

and started three new work items:

Q.NMP-LLMT: Network monitoring parameters for large language model training
Q.SFCP: Monitoring parameters for service function orchestration based on service function chaining
QSTR.MMPI: Monitoring parameters and methods for communication networks used in power inspection

15 Combating counterfeit telecommunication/ICT devices/software and mobile device theft

At this particular meeting, SG11 took the following decisions (see cl.1 and 3 above):

Approved Recommendation ITU-T Q.5056 (ex Q.FC-MCM): Framework for combating online Multimedia Content Misappropriation
The approval of the determined draft Recommendation ITU-T Q.5055 (ex Q.CEIR): Technical requirement, interfaces and generic functions of a central equipment identity register (CEIR) was defered to the next SG11 meeting (Geneva, 3-11 March 2026)

started a new Supplement:

Q.Sup.RCV-DVC: Procedures for recovering stolen devices

SG11 made progress on four ongoing work items.

16 SG11 Workshops and Webinars

Since last SG11 meeting (February 2025), ITU organized the following Workshops and Forum on SG11 related topic:

ITU Workshop - Securing Telephone Networks: Toward collaborative approach for combating fraudulent communications using Digital Certificate, http://itu.int/go/WS-STN, Geneva, 17 November 2025
Fourth ITU Regional Workshop for Africa “Strengthening ICT Integrity: Combating Counterfeits, Testing Challenges, and Fraudulent Communications in the Africa Region”, Tunis, Tunisia, 1 October 2025
ITU Forum "Future Technologies: AI, Metaverse, HTC and other ICT Applications and Services. Vision 2030"
Saint Petersburg, Russian Federation, 9-11 June 2025

17 ITU Workshop on Securing Telephone Networks

During ITU-T SG11 meeting, on 17 November 2025, ITU organized a Workshop on Securing Telephone Networks: Toward a Collaborative Approach for Combating Fraudulent Communications Using Digital Certificates (https://itu.int/go/WS-STN).

See ITU News blog.

The key objectives of the Workshop were to raise awareness about the growing threats posed by fraudulent communications, present current ITU initiatives related to the use of digital public-key certificates for authenticating Calling Line Identification (CLI) and facilitate international collaboration among all interested stakeholders to address this global issue.

A dedicated roundtable discussion brought together key stakeholders from government agencies, telecom operators, financial institutions, standards bodies, and cybersecurity experts to engage in an open and solutions-oriented dialogue. It offered an open forum to discuss the adoption of ITU signalling security standards, supporting the creation of a trusted global framework for secure interconnection - ultimately reinforcing the global telecommunications infrastructure against fraudulent communications. The session was critical for generating consensus and fostering commitment toward a collective action.

It was highlighted that fraudulent communications, including spoofing and scam calls, represent a significant and growing global threat, undermining national security and consumer confidence. The exploitation of weaknesses in legacy signalling protocols like SS7 is widespread, with attackers leveraging these vulnerabilities for a range of malicious activities.

The workshop emphasised the importance of adopting robust authentication measures and international cooperation, noting that the problem is prevalent across various regions, each facing unique challenges such as differing regulatory landscapes and levels of technology adoption.

The workshop outcomes, key takeaways and call for actions are summarized in SG11-TD714-R2/GEN. The relevant LS was sent to SG2, SG17 and TSAG (SG11-LS54).

18 New Terms and Definitions

ITU-T SG11 continues its practice to inform SCV about new terms and definitions defined in the draft standards consented, approved and determined. At this particular meeting, ITU-T SG11 informed SCV about new terms and definitions extracted from work items consented at this particular meeting. The liaison statement is available in SG11-TD820/GEN.

Also, SG11 considered number of iLSs received from SCV/CCT and prepared relevant replies (SG11-TD800-R1/GEN, SG11-TD813/GEN, SG11-TD814/GEN, SG11-TD815-R1/GEN and SG11-TD817/GEN).

19 Stale work items

SG11 considered the list of stale work items (SG11-TD388/GEN). There were six stale work items namely Q.IBN-SA (Q1/11), Q.RMP-Fc (Q2/11), QSTR-SSC (Q2/11), Q.SCC (Q4/11), Q.Suppl.Inter-SDWAN (Q4/11) and Q.MEC-FED (Q7/11). Most of them were updated while QSTR-SSC (Q2/11) remains stale as of November 2025. Editors were encouraged to progress it in the next meeting.

Also, two out of eight work items which are supposed to achieve stale status in 3 and 6 months were updated.

20 Action plan

There are no updates for SG11 action plan for the study period 2025-2028. The latest version agreed in February 2025 is available in SG11-TD198/GEN.

21 Success stories

Following TSAG’s request on seeking success stories on real-world implementations of ITU-T standards, SG11 prepared 15 use cases proposed by India, China and Japan. Among them were success stories on the following topics: combating counterfeiting/stolen ICT devices, Quantum key distribution networks, Virtualized Broadband Network Gateway, Computing power network, Software-defined data center interconnection, Service Based Network, Signalling architecture of data channel enhanced IMS network, Protocol, service and network monitoring, Cloud-Network Convergence, IMT-2020 network and cloud computing testing.

The relevant LS was sent to TSAG (SG11-TD662-R1/GEN).

22 Outgoing Liaison Statements

SG11 agreed to send out 58 outgoing liaison statements (oLSs). In addition, SG11 noted one outgoing LS (SG11-LS50/SG11-TD536/GEN), which was agreed by the Management Team by correspondence in July 2025.

The full list of oLSs agreed by SG11 is available in SG11-TD391/GEN.

23 New work items
23.1 New work items initiated during ITU-T SG11 meeting (Geneva, 17-26 November 2025)
ITU-T SG11 agreed to start 18 new work items. See SG11-TD393/GEN.

23.2 Work items initiated during the interim Rapporteur meetings
None.

24 Work plan for interim Rapporteur Group e-meetings (RGM)

ITU-T SG11 decided to conduct the following interim RGM:

Q4/11 (e-meeting, 6-8 January 2026)
Q15/11 (e-meeting, 20-21 January 2026)
Q15/11 (e-meeting, 10-11 February 2026)

More details are available in SG11-TD394-R1/GEN.

25 Regional Groups meetings

Since last SG11 meeting (Geneva, 19-28 February 2025), there were two Regional Groups meetings of SG11, as follows:

SG11RG-EECAT conducted its first meeting in the current Study Period in Saint-Petersburg, Russian Federation from 9 to 11 June 2025 (https://itu.int/go/tsg11rgeecat). The meeting was collocated with ITU Forum “Future Technologies: AI, Metaverse, HTC and other ICT Applications and Services. Vision 2030”. The report is to be found in SG11RG-EECAT-R1.
SG11RG-AFR conducted its first meeting in the current Study Period in Tunis, Tunisia from 1-3 October 2025 (https://itu.int/go/tsg11rgafr). The meeting was collocated with fourth ITU Regional Workshop for Africa “Strengthening ICT Integrity: Combating Counterfeits, Testing Challenges, and Fraudulent Communications in the Africa Region”. The report is to be found in SG11RG-AFR-R1-R1.

Based on the request of the SG11RG-EECAT and SG11RG-AFR, the appointment of new management teams of these regional groups was confirmed by SG11, as follows:

Management team of SG11RG-EECAT
Chair: Andrey Koucheryavy (Russian Federation, SPbSUT)
Management team of SG11RG-AFR
Chair: Kofi Ntim YEBOAH-KORDIEH (NCA, Ghana)
VC: Salim Nebili (Tunisie Telecom)

SG11 considered revised the ToR of the Regional Groups. They were approved without any additional changes. The revised ToR are available in SG11-TD400/GEN and SG11-TD601/GEN.

Both Regional Groups plan to meet in 2026. The dates and venues are to be confirmed.

26 Next Study Group 11 meeting

It was noted that next ITU-T SG11 meeting is planned to be held in Geneva from 3 to 11 March 2026. More details are available in SG11-TD394-R1/GEN.

During the SG11 plenary, and in response to TSAG's discussion regarding meeting organization efficiency, SG11 decided to shorten the duration of future statutory SG11 meetings from eight days to seven days. The new schedule will run from Tuesday of the first week to Wednesday of the following week. It was noted that a maximum of eight sessions can run simultaneously, with morning and evening sessions available if necessary.

27 10 years anniversary of SG11-ETSI TC INT collaboration

At the opening plenary, the Chair of SG11 emphasised a significant milestone - the 10th anniversary of the collaboration between SG11 and ETSI TC INT. This partnership has resulted in the development of 58 joint test specifications. Further details can be found in document SG11-TD617/GEN.

A Certificate of Appreciation was presented to Mr Giulio Maggiore, Chair of ETSI TC INT.

28 AOB

The group photo of the closing plenary is available here (26 November 2025).