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ETSI TS 126 131
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ETSI TS 126 131 Universal Mobile Telecommunications System (UMTS); Terminal Acoustic Characteristics for Telephony; Requirements (3GPP TS 26.131 version 14.0.0 Release 14)
standard by European Telecommunications Standards Institute, 04/01/2017
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Full Description
ETSI TS 126 131 is applicable to any terminal capable of supporting narrowband, wideband, super-wideband orfullband telephony, either as a stand-alone service or as the telephony component of a multimedia service. The presentdocument specifies minimum performance requirements for the acoustic characteristics of 3G and LTE terminals whenused to provide narrowband, wideband, super-wideband or fullband telephony.The set of minimum performance requirements enables a guaranteed level of speech quality while taking possiblephysical limits of the terminal design into account. Some performance objectives are also defined, if such design limitscan be overcome. Care must be taken in applying performance objectives in isolation, not to degrade overall end-userspeech quality.