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Preview ETSI TS 123135-V19.0.0 15.10.2025
ETSI TS 123135-V19.0.0

Universal Mobile Telecommunications System (UMTS); LTE; Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 19.0.0 Release 19)

Standard published on 15.10.2025

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Preview ETSI TS 123135-V3.0.0 31.3.2000
ETSI TS 123135-V3.0.0

Universal Mobile Telecommunications System (UMTS); Multicall; Stage 2 (3G TS 23.135 version 3.0.0 Release 1999)

Standard published on 31.3.2000

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Preview ETSI TS 123135-V3.1.0 22.6.2000
ETSI TS 123135-V3.1.0

Universal Mobile Telecommunications System (UMTS); Multicall supplementary service - Stage 2 (3G TS 23.135 version 3.1.0 Release 1999)

Standard published on 22.6.2000

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Preview ETSI TS 123135-V3.2.0 30.9.2000
ETSI TS 123135-V3.2.0

Universal Mobile Telecommunications System (UMTS); Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 3.2.0 Release 1999)

Standard published on 30.9.2000

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Preview ETSI TS 123135-V4.0.0 5.8.2002
ETSI TS 123135-V4.0.0

Universal Mobile Telecommunications System (UMTS); Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 4.0.0 Release 4)

Standard published on 5.8.2002

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Preview ETSI TS 123135-V5.0.0 30.6.2002
ETSI TS 123135-V5.0.0

Universal Mobile Telecommunications System (UMTS); Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 5.0.0 Release 5)

Standard published on 30.6.2002

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Preview ETSI TS 123135-V6.0.0 31.12.2004
ETSI TS 123135-V6.0.0

Universal Mobile Telecommunications System (UMTS); Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 6.0.0 Release 6)

Standard published on 31.12.2004

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Preview ETSI TS 123135-V7.0.0 17.7.2007
ETSI TS 123135-V7.0.0

Universal Mobile Telecommunications System (UMTS); Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 7.0.0 Release 7)

Standard published on 17.7.2007

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Preview ETSI TS 123135-V8.0.0 9.1.2009
ETSI TS 123135-V8.0.0

Universal Mobile Telecommunications System (UMTS); LTE; Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 8.0.0 Release 8)

Standard published on 9.1.2009

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Preview ETSI TS 123135-V9.0.0 25.1.2010
ETSI TS 123135-V9.0.0

Universal Mobile Telecommunications System (UMTS); LTE; Multicall supplementary service; Stage 2 (3GPP TS 23.135 version 9.0.0 Release 9)

Standard published on 25.1.2010

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