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37280 TTAT.3G-24.007V19.4.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;Mobile radio interface signalling layer 3; General Aspects(Release 19) 2026-05-04
37279 TTAT.3G-24.008V19.5.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;Mobile radio interface Layer 3 specification; Core network protocols; Stage 3(Release 19) 2026-05-04
37278 TTAT.3G-24.186V19.5.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;IMS Data Channel applications; Protocol specification(Release 19) 2026-05-04
37277 TTAT.3G-24.193V19.5.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;5G System;Access Traffic Steering, Switching and Splitting (ATSSS); Stage 3(Release 19) 2026-05-04
37276 TTAT.3G-24.229V18.9.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3(Release 18) 2026-05-04
37275 TTAT.3G-24.229V19.5.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3(Release 19) 2026-05-04
37274 TTAT.3G-24.281V17.12.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;Mission Critical Video (MCVideo) signalling control; Protocol specification(Release 17) 2026-05-04
37273 TTAT.3G-24.281V18.11.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;Mission Critical Video (MCVideo) signalling control; Protocol specification(Release 18) 2026-05-04
37272 TTAT.3G-24.281V19.4.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;Mission Critical Video (MCVideo) signalling control; Protocol specification(Release 19) 2026-05-04
37271 TTAT.3G-24.282V14.12.0 3rd Generation Partnership Project;Technical Specification Group Core Network and Terminals;Mission Critical Data (MCData) signalling control; Protocol specification(Release 14) 2026-05-04