| LS | Title | From | To | Approval date |
| SG11-LS42 | LS/r on draft Recommendation ITU-T Q.Req_Frame_RRDN “Requirements and framework for rapid response to natural disasters on network” (reply to SG2-LS105, ITU-D SG1-Doc1/461-LS69 and ITU-D SG1-1/458-E) | SG11 | ITU-R WP 5A; ITU-D SG 1; SG2; | 2025-02-28 |
| ITU-D SG 1-Doc 1/461- LS69 | LS on use of telecommunications/ICTs for disaster risk reduction and management | ITU-D SG 1 | ITU-R; SG2; SG5; SG21; SG11; SG13; SG15; SG20; | 2024-11-08 |
| ITU-D SG 1-1/458-E | LS/r on draft Recommendation ITU-T Q.Req_Frame_RRDN “Requirements and framework for rapid response to sudden natural disasters in network” (reply SG11-LS174 ) | ITU-D SG 1 | SG11; | 2024-11-08 |
| SG2-LS105 | LS/r on initiation of new work item ITU-T Q.IEM_arch_req “Reference architecture and signalling requirements for interactive emergency messaging through mobile network” and ITU-T Q.Req_Frame_RRDN, “Requirements and framework for rapid response to sudden natural disasters in network” (reply to SG11-LS173) | SG2 | EMTEL; 3GPP TSG SA1; GSMA; 3GPP TSG SA2; SG11; | 2024-06-28 |
| SG11-LS173 | LS on initiation of new work item ITU-T Q.IEM_arch_req “Reference architecture and signalling requirements for interactive emergency messaging through mobile network” | SG11 | EMTEL; 3GPP TSG SA1; GSMA; 3GPP TSG SA2; SG2; | 2024-05-10 |
| SG11-LS174 | LS on draft Recommendation ITU-T Q.Req_Frame_RRDN “Requirements and framework for rapid response to sudden natural disasters in network” | SG11 | ITU-R WP 5A; ITU-D SG 1; SG2; | 2024-05-10 |
