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Question 3/11

Question 3/11 – Signalling requirements and protocol for emergency telecommunications
(Continuation of Question 13/11)


In the emerging network environment, impacts of new technologies and services (e.g. machine-to-machine (M2M) communication, Internet of things (IoT), cloud computing and future networks) on emergency telecommunications, including emergency telecommunication service (ETS), will need to be studied. In addition, it is needed to be studied how some of the emerging services can be leveraged for the benefit of emergency telecommunications.

Some technical areas for consideration include: work related to the use of the IETF authority to citizen alert (ATOCA) WG RFCs, SG 17 and OASIS specified CAP protocol in support of early warning, data transmission for emergency telecommunications, etc.

There is also a need to continue development of emergency telecommunications applications, e.g. voice, video, data signalling requirements and protocol enhancements. Ensuring the maintenance of existing ETS capabilities in SG 11 Supplements and Recommendations, e.g. Q.931, Q.761, Q.762, Q.763, Q.764, Q.1902.1, Q.1902.3, Q.1902.4, Q.1950, Q.2630.3, Q.2931, and Q-series Supplement 53.


Study items to be considered include, but are not limited to:

  • What signalling requirements and protocol enhancements need to be defined in support of emergency telecommunications?
  • What recommendations must be created in response to these requirements because the work is not covered by other SG Questions as part of the coordination role?
  • What changes should be proposed to the overall plans maintained by the respective lead study groups, to provide for new capabilities, to provide better realization of capabilities already being standardized, or to remove obsolete content?


Tasks include, but are not limited to:

  • analysis of emergency telecommunication capabilities to which priority has been assigned by their respective lead study group to determine the specific study tasks that must be added to the work plans of individual SG Questions;
  • ensuring that the necessary communications take place at the technical level between the Questions of the study group, so that their work of realization of emergency telecommunication capabilities is effective, consistent, and complete;
  • ensuring that the necessary communications take place at the technical level between the Questions of the study group, Questions of other study groups, and other groups defining standards relating to emergency telecommunications, as identified by the plans maintained by the respective lead study groups;
  • reviewing capabilities associated with ETS and disaster relief communications specified in recommendations within the area of responsibility of the study group, to ensure that they are still relevant and effective;
  • contributing to the development and maintenance of the plans which are the responsibility of the respective lead study groups for emergency telecommunications, including the proposal of new content when this seems appropriate;
  • creation of supplements and recommendations defining signalling requirements and protocols in support of emergency telecommunications;
  • creation of new recommendations dealing with emergency telecommunication when these fall outside the scope of other Questions of the study group;
  • development of methodology for security testing and test specification for security testing of Emergency Telecommunication related signalling and protocol functions.

An up-to-date status of work under this Question is contained in the SG 11 work programme



  • The Question is responsible for maintenance of the ETS aspects of the following Recommendations: Q.931, Q.761, Q.762, Q.763, Q.764, Q.1902.1, Q.Q.1902.3, Q.1902.4, Q.1950, Q.2630.3, Q.2931, Q-series Supplement 47, Q-series Supplement 53, Q-series Supplement 57, Q-series Supplement 61, and Q-series Supplement 62. The work that the Question oversees operates within the framework defined by Recommendation ITU‑T Y.1271 and Recommendation ITU‑T Y.2205


  •  All Questions of SG 11

Study groups

  • ITU‑T SG 2, SG 9, SG 13, SG 16, and SG 17, especially SG Questions specifically relating to emergency telecommunications and work of related Focus Groups (FG), e.g. FG on disaster relief systems, network resilience and recovery (FG-DR&NRR)

Standardization bodies

  • 3GPP, IETF, IEEE, and regional SDOs dealing with emergency telecommunications or capabilities required for their implementation