Normy ETSI - Evropský úřad pro normalizaci v telekomunikacích - strana 1100

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 1 (3GPP TS 22.091 version 5.0.0 Release 5)

Norma vydána dne 30.6.2002

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 1 (3GPP TS 22.091 version 6.0.0 Release 6)

Norma vydána dne 7.1.2005

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 1 (3GPP TS 22.091 version 7.0.0 Release 7)

Norma vydána dne 30.6.2007

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Explicit Call Transfer (ECT) supplementary service; Stage 1 (3GPP TS 22.091 version 8.0.0 Release 8)

Norma vydána dne 16.1.2009

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Explicit Call Transfer (ECT) supplementary service; Stage 1 (3GPP TS 22.091 version 9.0.0 Release 9)

Norma vydána dne 21.1.2010

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (3GPP TS 22.093 version 10.0.0 Release 10)

Norma vydána dne 13.5.2011

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (3GPP TS 22.093 version 11.0.0 Release 11)

Norma vydána dne 23.10.2012

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (3GPP TS 22.093 version 12.0.0 Release 12)

Norma vydána dne 23.10.2014

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (3GPP TS 22.093 version 13.0.0 Release 13)

Norma vydána dne 29.1.2016

Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (3GPP TS 22.093 version 14.0.0 Release 14)

Norma vydána dne 28.3.2017