PRETS 300 380 : NOV 93
Superseded
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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UNIVERSAL PERSONAL TELECOMMUNICATIONS (UPT)
Superseded date
01-03-1995
Published date
12-01-2013
Mechanical and acoustical characteristics of a UPT DTMF access device which is acoustically coupled to the microphone of a handset telephony terminal.
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