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phone DTMF touchtone dialer acoustic coupler and keypad from Tokai closeup 1 DHD.jpg
D=2008-08-23 [Aug 23, 2008]; S=2MB, 3072x2304; T=JPEG image [MIME:image/jpeg].
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• phone = phones, telephone
• phone dtmf = Dual Tone Multi-Frequency (DTMF), TouchTone(TM), Touch-Tone(TM)

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