{"id":8995,"number":"24.979","type":"TR","title":"Combining Circuit-Switched (CS) calls and IP Multimedia Subsystem (IMS) sessions","series":24,"status":"Withdrawn before change control","initial_release":"Rel-7","primary_group":"C1","secondary_groups":[],"portal_id":1149,"portal_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1149","dynareport_url":"https://www.3gpp.org/dynareport/24979.htm","publication_scope":null,"radio_technologies":[],"first_seen_at":"2026-09-16T11:13:24.179994+00:00","updated_at":"2026-10-16T09:34:55.609033+00:00","raw_metadata":{"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1149"},"detail_synced_at":"2026-10-07T23:53:14.167268+00:00","versions":[],"release_presence":[],"classifications":[],"work_items":[{"uid":31055,"acronym":"IRTSD-CS_IMS","effective_acronym":"IRTSD-CS_IMS","title":"Study on Combining CS calls and IMS sessions","responsible_groups":["S1"],"release":"Rel-7","status":"Awaiting approval","wi_level":"Feature (1st level)","type":"Work Item","first_release":null,"last_release":null,"provenance_type":"official","source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1149","association_sources":[],"association_status":"historical_unverified"}],"change_requests":[],"relationships":[],"relationship_release_evidence_summary":[],"relationship_release_evidence":[],"relationship_release_evidence_meta":{"total":0,"returned_count":0,"limit":100,"truncated":false,"href":"/api/specs/24.979/relationship-evidence"}}