When you make a call, it says send DTMF. what does that mean? In settings, there is also an option: DTMF length.
Please give me sourse too.
2007-03-20 19:54:14 · 4 answers · asked by Hrushi 2 in Consumer Electronics ➔ Cell Phones & Plans
That is the tone you hear when you press a number button in a call. Like when you call customer service and they're like "Press press 1 to contact person a, Press 2 to contact a local store, Press...."
DTMF means that when you press a number button it sends the tone. You can turn it off on cellphones so that you dont accidently press the button and annoy the guy on the line. The Length is mainly for compadablity issues mentioned above. Some machines can't understand a DTMF tone if it's too short, that's why it can be longer.
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2007-03-20 19:58:03 · answer #1 · answered by Reppie 3 · 1⤊ 0⤋
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2016-08-07 23:21:51 · answer #2 · answered by Dianne 3 · 0⤊ 0⤋
Dual-tone multi-frequency (DTMF) signaling is used for telephone signaling over the line in the voice-frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch-Tone, and is standardised by ITU-T Recommendation Q.23. Other multi-frequency systems are used for signaling internal to the telephone network.
DTMF is an example of a multifrequency shift keying (MFSK) system. Today DTMF is used for most call setup to the telephone exchange, at least in developed regions of the world, and trunk signalling is now done out of band using the SS7 signaling system. The in band trunk signalling tones were different from the DTMF tones known as Touch-Tone, with a two out of six code being used rather than a square matrix
2007-03-20 20:04:28 · answer #3 · answered by PUNJABI ROCKS 2 · 0⤊ 0⤋
DTMF is Dual Tone Multiple Frequency.
2007-03-20 20:01:37 · answer #4 · answered by Anonymous · 0⤊ 0⤋