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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.
Digital cellular telecommunications system (Phase 2+) (GSM); Base Station System (BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 17.0.0 Release 17)
Standard published on 2.5.2022
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Base Station System (BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 18.0.0 Release 18)
Standard published on 13.5.2024
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Base Station System (BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 19.0.0 Release 19)
Standard published on 21.10.2025
Selected format:Digital cellular telecommunications system (Phase 2+); GSM radio aspects base station system equipment specification (3GPP TS 51.021 version 4.0.0 Release 4)
Standard published on 30.11.2001
Selected format:Digital cellular telecommunications system (Phase 2+); GSM radio aspects base station system equipment specification (3GPP TS 51.021 version 4.1.0 Release 4)
Standard published on 30.6.2002
Selected format:Digital cellular telecommunications system (Phase 2+); GSM radio aspects base station system equipment specification (3GPP TS 51.021 version 4.2.0 Release 4)
Standard published on 30.11.2002
Selected format:Digital cellular telecommunications system (Phase 2+); GSM radio aspects base station system equipment specification (3GPP TS 51.021 version 4.3.0 Release 4)
Standard published on 28.2.2003
Selected format:Digital cellular telecommunications system (Phase 2+); GSM radio aspects base station system equipment specification (3GPP TS 51.021 version 4.4.0 Release 4)
Standard published on 30.6.2003
Selected format:Digital cellular telecommunications system (Phase 2+); Base Station System (BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 4.5.0 Release 4)
Standard published on 30.11.2005
Selected format:Digital cellular telecommunications system (Phase 2+); Base Station System (BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 4.6.0 Release 4)
Standard published on 7.7.2009
Selected format:Latest update: 2026-01-19 (Number of items: 2 257 233)
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