Dual Tone Multi Frequency

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Dual Tone Multi Frequency

(communications)
(DTMF, or "touch-tone") A method used by the telephone system to communicate the keys pressed when dialling. Pressing a key on the phone's keypad generates two simultaneous tones, one for the row and one for the column. These are decoded by the exchange to determine which key was pressed.
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The Envox Prescription Refill application, which can be configured to accept Dual-Tone Multi-Frequency (DTMF) or speech input, provides pharmacies with a well-tested call flow and speech user interface that can be implemented with minimal customization.
At the same time, a dual-tone multi-frequency receiver is activated and connected for your line to detect the tones generated by the keypad or interpret the clicks.
Dual-tone multi-frequency (DTMF): DTMF is a tone-signaling scheme often used for various control purposes via the telephone network, such as remote control of an answering machine.
Replacing functions such as the basic hierarchical dual-tone multi-frequency (DTMF) menus and complex dialogs employing natural language understanding, automatic speech recognition (ASR) is finding its way into enterprises conducting e-business and carriers deploying voice-activated dialing and automated directory assistance.
This included single tone (CTCSS), tone-dial interrupt, two-tone sequential paging, dual-tone multi-frequency, mobile telephone service, improved mobile telephone service, 5/6-tone pager, remote base station, digital-coded squelch (CDCSS) and digital-pager display formats.
In the North American telephone network, there are different methods of inter-office signaling--Dial Pulse (DP), Multi-frequency (MF), Modem, Common-Channel Inter-office Signaling (CCIS) [currently limited to Class 4 and higher offices], eventually CCITT 7 (currently not available in North America) and finally Dual-Tone Multi-Frequency (DTMF).

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