| LS | Title | From | To | Approval date |
| ITU-R WP 4B-Doc-4B/TEMP/69-LS29 | LS/r on ITU-T Recommendations on fixed, mobile and satellite convergence (FMSC) and on-going work ITU-T Y.IMT2030-terms (SG13-LS216, SG13-LS225, SG13-LS226, SG13-LS227, SG13-LS228, SG13-LS229, SG13-LS230, SG13-LS271) | ITU-R WP 4B | ITU-R WP 5D; SG13; | 2026-10-28 |
| SG13-LS216 | LS on agreement of new Technical Report ITU-T YSTR.IMT2030-terms “IMT-2030 networks – Considerations on terms and definitions” and initiation of draft new Recommendation ITU-T Y.IMT2030-terms “IMT-2030 networks – Terms and definitions” | SG13 | ETSI; 3GPP TSG SA1; ITU-R WP 5D; SCV; 3GPP TSG SA2; ITU-R WP 4B; SG2; SG3; SG5; SG21; SG11; SG12; SG15; SG17; TSAG; SG20; | 2026-07-02 |
| SG13-LS225 | LS on consent of draft new Recommendation ITU-T Y.3231 (ex Y.FMSC-BM) “Fixed, mobile and satellite convergence – Network enhancements of supporting broadcast and multicast for IMT-2020 networks and beyond” | SG13 | ITU-R WP 5D; ITU-R WP 4B; SG2; SG11; SG15; SG17; | 2026-07-02 |
| SG13-LS226 | LS on consent of draft new Recommendation ITU-T Y.3232 (ex Y.FMSC-SF) “Fixed, mobile and satellite convergence – Store and forward for IMT-2020 networks and beyond” | SG13 | ITU-R WP 5D; ITU-R WP 4B; SG2; SG11; SG17; | 2026-07-02 |
| SG13-LS227 | LS on agreement of new Supplement 108 to ITU-T Y.3200 series (ex Y.Sup.fmsc-roadmap) “Fixed, mobile and satellite convergence – Standardization roadmap” | SG13 | ITU-R WP 5D; ITU-R WP 4B; SG2; SG11; SG15; SG17; | 2026-07-02 |
| SG13-LS228 | LS on initiation of draft new Recommendation ITU-T Y.FMSC-CPE “Fixed, mobile and satellite convergence – Control plane enhancement for IMT-2020 networks and beyond” | SG13 | ITU-R WP 5D; ITU-R WP 4B; SG2; SG11; SG15; SG17; | 2026-07-02 |
| SG13-LS229 | LS on initiation of draft new Recommendation ITU-T Y.FMSC-EFF “Fixed, mobile and satellite convergence – System efficiency enhancements for IMT-2020 networks and beyond” | SG13 | ITU-R WP 4B; ITU-R WP 5D; SG2; SG5; SG11; SG15; SG17; | 2026-07-02 |
| SG13-LS230 | LS on initiation of draft new Recommendation ITU-T Y.FMSC-IWF “Fixed, mobile and satellite convergence – Interworking function for IMT-2020 networks and beyond” | SG13 | ITU-R WP 5D; ITU-R WP 4B; SG11; SG15; SG17; | 2026-07-02 |
| SG13-LS271 | LS on initiation of draft new Recommendation ITU-T Y.FMSC-multi-NTN “Fixed, mobile and satellite convergence – Architectural framework for integration of multiple non-terrestrial network domains for IMT-2020 networks and beyond” | SG13 | ITU-R WP 5D; ITU-R WP 4B; | 2026-07-02 |
