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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); Universal Mobile Telecommunications System (UMTS); LTE; Architectural requirements (3GPP TS 23.221 version 17.0.0 Release 17)
Standard published on 5.4.2022
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Architectural requirements (3GPP TS 23.221 version 18.0.0 Release 18)
Standard published on 24.4.2024
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Architectural requirements (3GPP TS 23.221 version 19.0.0 Release 19)
Standard published on 14.10.2025
Selected format:Universal Mobile Telecommunications System (UMTS); Architectural requirements (3GPP TS 23.221 version 4.0.0 Release 4)
Standard published on 19.4.2001
Selected format:Universal Mobile Telecommunications System (UMTS); Architectural requirements (3GPP TS 23.221 version 4.1.0 Release 4)
Standard published on 26.7.2001
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Architectural requirements (3GPP TS 23.221 version 4.2.0 Release 4)
Standard published on 24.6.2002
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Architectural requirements (3GPP TS 23.221 version 5.10.0 Release 5)
Standard published on 30.6.2004
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Architectural requirements (3GPP TS 23.221 version 5.11.0 Release 5)
Standard published on 30.9.2004
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Architectural requirements (3GPP TS 23.221 version 5.4.0 Release 5)
Standard published on 31.3.2002
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Architectural requirements (3GPP TS 23.221 version 5.5.0 Release 5)
Standard published on 24.6.2002
Selected format:Latest update: 2026-07-26 (Number of items: 2 290 396)
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