I-ETS 300380:1995-03

Universal Personal Telecommunication (UPT) - Access devices - Dual Tone Multi Frequency (DTMF) sender for acoustical coupling to the microphone of a handset telephone

German title: Universelle personengebundene Telekommunikation (UPT) - Anschlußeinrichtungen - Doppelton-Mehrfrequenz-(DTMF)Sender für die akustische Kopplung an das Mikrofon des Telefonhörers
Publication date: 1995-03
Original language: English
Pages: 13

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