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  • ETSI I-ETS 300 380
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ETSI I-ETS 300 380

  • Universal Personal Telecommunication (UPT); Access devices Dual Tone Multi Frequency (DTMF) sender for acoustical coupling to the microphone of a handset telephone
  • standard by European Telecommunications Standards Institute, 03/01/1995
  • Publisher: ETSI

$9.00$17.50


The mechanicanical & acoustical characteristics of a UPT DTMF access device which is accoustically coupled to the microphone of a handset telephony terminal.

Product Details

Edition:
1
Published:
03/01/1995
Number of Pages:
13
File Size:
1 file , 61 KB

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