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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); Architectural Requirements (3G TS 23.121 version 3.2.0 Release 1999)
Standard published on 28.1.2000
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Architectural Requirements (3G TS 23.121 version 3.3.0 Release 1999)
Standard published on 31.3.2000
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Architectural Requirements (3GPP TS 23.121 version 3.4.0 Release 1999)
Standard published on 31.10.2000
Selected format:Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Architectural Requirements for Release 1999 (3GPP TS 23.121 version 3.5.1 Release 1999)
Standard published on 31.12.2000
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Architecture Requirements for release 99 (3GPP TS 23.121 version 3.6.0 Release 1999)
Standard published on 24.6.2002
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode (3GPP TS 23.122 version 10.3.0 Release 10)
Standard published on 7.4.2011
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode (3GPP TS 23.122 version 10.4.0 Release 10)
Standard published on 22.6.2011
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode (3GPP TS 23.122 version 10.5.0 Release 10)
Standard published on 21.10.2011
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode (3GPP TS 23.122 version 11.3.0 Release 11)
Standard published on 8.10.2012
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode (3GPP TS 23.122 version 11.4.0 Release 11)
Standard published on 16.1.2013
Selected format:Latest update: 2026-07-24 (Number of items: 2 290 214)
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