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Universal Mobile Telecommunications System (UMTS); Working Methods (3GPP TR 21.900 version 3.4.0 Release 1999)
Standard published on 30.9.2000
Selected format:Universal Mobile Telecommunications System (UMTS); Working methods (3GPP TR 21.900 version 3.5.0 Release 1999)
Standard published on 31.12.2000
Selected format:Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 3.6.0 Release 1999)
Standard published on 31.3.2001
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 3.7.0 Release 1999)
Standard published on 31.12.2003
Selected format:Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 4.0.0 Release 4)
Standard published on 31.3.2001
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 4.1.0 Release 4)
Standard published on 31.12.2003
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 5.0.1 Release 5)
Standard published on 30.9.2002
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 5.1.0 Release 5)
Standard published on 31.12.2003
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 6.1.1 Release 6)
Standard published on 31.3.2004
Selected format:Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Technical Specification Group working methods (3GPP TR 21.900 version 6.2.0 Release 6)
Standard published on 30.6.2004
Selected format:Latest update: 2026-09-03 (Number of items: 2 300 115)
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