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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.
Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 5.6.0 Release 5)
Standard published on 30.6.2005
Selected format:Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 6.1.0 Release 6)
Standard published on 31.1.2005
Selected format:Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 6.2.0 Release 6)
Standard published on 31.3.2005
Selected format:Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 6.3.0 Release 6)
Standard published on 30.6.2005
Selected format:Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 6.4.0 Release 6)
Standard published on 31.3.2006
Selected format:Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 7.0.0 Release 7)
Standard published on 30.6.2007
Selected format:Universal Mobile Telecommunications System (UMTS); LTE; Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 8.0.0 Release 8)
Standard published on 20.1.2009
Selected format:Universal Mobile Telecommunications System (UMTS); Technical realization of Circuit Switched (CS) multimedia service; UDI/RDI fallback and service modification; Stage 2 (3GPP TS 23.172 version 9.0.0 Release 9)
Standard published on 3.2.2010
Selected format:Universal Mobile Telecommunications System (UMTS); LTE; Functional architecture and information flows to support mission critical communication services; (3GPP TS 23.179 version 13.0.0 Release 13)
Standard published on 15.1.2016
Selected format:Universal Mobile Telecommunications System (UMTS); LTE; Functional architecture and information flows to support mission critical communication services; Stage 2 (3GPP TS 23.179 version 13.1.0 Release 13)
Standard published on 12.4.2016
Selected format:Latest update: 2026-07-26 (Number of items: 2 290 396)
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