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ETSI TS 124091-V13.0.0
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Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 3 (3GPP TS 24.091 version 13.0.0 Release 13)
Standard published on 18.1.2016
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ETSI TS 124091-V14.0.0
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Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 3 (3GPP TS 24.091 version 14.0.0 Release 14)
Standard published on 30.3.2017
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ETSI TS 124091-V15.0.0
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Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 3 (3GPP TS 24.091 version 15.0.0 Release 15)
Standard published on 4.7.2018
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ETSI TS 124091-V16.0.0
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Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 3 (3GPP TS 24.091 version 16.0.0 Release 16)
Standard published on 20.7.2020
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ETSI TS 124091-V17.0.0
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Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 3 (3GPP TS 24.091 version 17.0.0 Release 17)
Standard published on 20.4.2022
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ETSI TS 124091-V18.0.0
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Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 3 (3GPP TS 24.091 version 18.0.0 Release 18)
Standard published on 16.5.2024
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ETSI TS 124091-V19.0.0
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Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 3 (3GPP TS 24.091 version 19.0.0 Release 19)
Standard published on 15.10.2025
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ETSI TS 124091-V3.0.0
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Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service - Stage 3 (3G TS 24.091 version 3.0.0 Release 1999)
Standard published on 28.1.2000
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ETSI TS 124091-V4.0.1
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Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) Supplementary Service; Stage 3 (3GPP TS 24.091 version 4.0.1 Release 4)
Standard published on 30.6.2002
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ETSI TS 124091-V5.0.0
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Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) Supplementary Service; Stage 3 (3GPP TS 24.091 version 5.0.0 Release 5)
Standard published on 30.6.2002
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