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ETSI - European Telecommunication Standard Institute(ETSI) produces globally-applicable standards for information and telecommunication technologies (ICT) including land, mobile, radio, converged, broadcast and internet technologies.
Electromagnetic compatibility and Radio spectrum Matters (ERM); Terrestrial Flight Telecommunications System; Protocol to support GSM-A;
Standard published on 26.11.2001
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (GSM 02.93 version 6.0.1 Release 1997)
Standard published on 31.7.1998
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (GSM 02.93 version 7.0.0 Release 1998)
Standard published on 13.8.1999
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Completion of Calls to Busy Subscriber (CCBS); Stage 2 (GSM 03.93 version 6.1.0)
Standard published on 31.7.1998
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Technical realization of Completion of Calls to Busy Subscriber (CCBS); Stage 2 (GSM 03.93 version 6.2.0 Release 1997)
Standard published on 30.10.1998
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Technical realization of Completion of Calls to Busy Subscriber (CCBS); Stage 2 (GSM 03.93 version 7.0.0 Release 1998)
Standard published on 13.8.1999
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Completion of Calls to Busy Subscriber (CCBS); Stage 3 (GSM 04.93 version 6.1.0 Release 1997)
Standard published on 31.7.1998
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Completion of Calls to Busy Subscriber (CCBS); Stage 3 (GSM 04.93 version 6.1.1 Release 1997)
Standard published on 26.2.1999
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Completion of Calls to Busy Subscriber (CCBS); Stage 3 (GSM 04.93 version 7.0.0 Release 1998)
Standard published on 13.8.1999
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Customised Applications for Mobile network Enhanced Logic (CAMEL); Service definition, Stage 1 (GSM 02.78 version 6.1.0)
Standard published on 31.7.1998
Selected format:Latest update: 2026-06-11 (Number of items: 2 281 927)
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