Specification
3GPP TS 24.239: Flexible Alerting (FA) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification
At a glance
- Title
- Flexible Alerting (FA) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification
- Newest version
- V19.0.0 (Rel-19)
- Versions indexed
- 5
- Newest per release
- Rel-15: V15.0.0 (2017-12-28); Rel-16: V16.0.0 (2019-12-19); Rel-17: V17.0.0 (2022-04-01); Rel-18: V18.0.0 (2024-04-04); Rel-19: V19.0.0 (2025-10-14)
In plain words
TS 24.239 provides protocol details for Flexible Alerting (FA) in the IP Multimedia (IM) Core Network (CN) subsystem. Its call handling is described as "Flexible Alerting (FA) causes a call to a pilot identity to branch the call into several legs to alert several termination addresses (group members) simultaneously." The first leg answered connects to the calling party, and additional calls may be delivered to the FA Pilot Identity at any time.
Source: 3GPP TS 24.239 V19.0.0, clause 1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/24_series/24.239/24239-j00.zip
Newest version in each release
| Release | Newest version | In the archive | TSG meeting |
|---|---|---|---|
| Rel-19 | V19.0.0 | 2025-10-14 | TSG SA #109 |
| Rel-18 | V18.0.0 | 2024-04-04 | TSG SA #103 |
| Rel-17 | V17.0.0 | 2022-04-01 | not recorded |
| Rel-16 | V16.0.0 | 2019-12-19 | TSG CT #86 |
| Rel-15 | V15.0.0 | 2017-12-28 | TSG CT #78 |
Source: 3GPP specification archive, versions indexed by 3GPP Scout. Each version links its official file.
Meetings behind the latest versions
Plenary meetings:
- TSG SA #109 is recorded for V19.0.0 (Rel-19)
- TSG SA #103 is recorded for V18.0.0 (Rel-18)
Source: 3GPP CR database and specification archive, as indexed by 3GPP Scout.
Sources
- 3GPP TS 24.239 V19.0.0, clause 1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/24_series/24.239/24239-j00.zip
- 3GPP TS 24.239 V19.0.0, clause 4.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/24_series/24.239/24239-j00.zip
How this page was made
The facts box and the tables come straight from the 3GPP specification archive and CR database as indexed by 3GPP Scout. An AI model (GPT-6 Luna) wrote the paragraph and named the source of each sentence. Code checked every quote word for word against the stored source text and every number against the cited source. A second AI model from another company (Claude Opus 5.5) reviewed the paragraph against the same sources. The 3GPP documents themselves govern.