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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); Terminal Acoustic Characteristics for Telephony; Requirements (3G TS 26.131 version 3.1.0 Release 1999)
Standard published on 22.6.2000
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal Acoustic Characteristics for Telephony; Requirements (3GPP TS 26.131 version 3.2.0 Release 1999)
Standard published on 31.3.2001
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal Acoustic Characteristics for Telephony; Requirements (3GPP TS 26.131 version 3.3.0 Release 1999)
Standard published on 30.9.2001
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal acoustic characteristics for telephony; Requirements (3GPP TS 26.131 version 3.4.0 Release 1999)
Standard published on 30.9.2002
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal Acoustic Characteristics for Telephony; Requirements (3GPP TS 26.131 version 4.0.0 Release 4)
Standard published on 31.3.2001
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal Acoustic Characteristics for Telephony; Requirements (3GPP TS 26.131 version 4.1.0 Release 4)
Standard published on 30.9.2001
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal acoustic characteristics for telephony; Requirements (3GPP TS 26.131 version 4.2.0 Release 4)
Standard published on 30.9.2002
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal Acoustic Characteristics for Telephony; Requirements (3GPP TS 26.131 version 5.1.0 Release 5)
Standard published on 11.6.2002
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal acoustic characteristics for telephony; Requirements (3GPP TS 26.131 version 5.2.0 Release 5)
Standard published on 30.9.2002
Selected format:Universal Mobile Telecommunications System (UMTS); Terminal acoustic characteristics for telephony; Requirements (3GPP TS 26.131 version 6.0.0 Release 6)
Standard published on 28.1.2005
Selected format:Latest update: 2026-09-17 (Number of items: 2 301 467)
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