DTMF (Dual Tone Multi-Frequency): Difference between revisions
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'''NENA-STA-027''', NENA E9-1-1 PSAP Equipment Standards |
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Latest revision as of 18:26, 9 January 2024
DTMF (Dual Tone Multi-Frequency) is the transmission of a selected number or symbol (*, #) via the generation of a specific pair of tones when that number’s or symbol’s button on a push button telephone is pressed. The tones are audible and transmitted within the voice band.
Relevant NENA Documents
Note: To find and download the document, copy the document number (like NENA-STA-010) from below and search the NENA Standards and Documents page.
NENA-STA-027, NENA E9-1-1 PSAP Equipment Standards