http://mars.merhot.dk/w/index.php?action=history&feed=atom&title=DTMF
DTMF - Revision history
2026-05-11T13:34:50Z
Revision history for this page on the wiki
MediaWiki 1.29.0
http://mars.merhot.dk/w/index.php?title=DTMF&diff=16212&oldid=prev
Heth: Dtmf moved to DTMF
2010-12-03T06:52:20Z
<p><a href="/w/index.php/Dtmf" class="mw-redirect" title="Dtmf">Dtmf</a> moved to <a href="/w/index.php/DTMF" title="DTMF">DTMF</a></p>
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<td colspan='1' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='1' style="background-color: white; color:black; text-align: center;">Revision as of 06:52, 3 December 2010</td>
</tr><tr><td colspan='2' style='text-align: center;' lang='en'><div class="mw-diff-empty">(No difference)</div>
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Heth
http://mars.merhot.dk/w/index.php?title=DTMF&diff=1701&oldid=prev
Heth at 04:13, 19 February 2009
2009-02-19T04:13:58Z
<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 04:13, 19 February 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[category:Telecom]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Keypad==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Keypad==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{main|Telephone keypad}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{main|Telephone keypad}}</div></td></tr>
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Heth
http://mars.merhot.dk/w/index.php?title=DTMF&diff=1289&oldid=prev
Heth at 11:10, 16 February 2009
2009-02-16T11:10:31Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 11:10, 16 February 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3" >Line 3:</td>
<td colspan="2" class="diff-lineno">Line 3:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The DTMF keypad is laid out in a 4&times;4 matrix, with each row representing a ''low'' frequency, and each column representing a ''high'' frequency.  Pressing a single key (such as '1' ) will send a [[sinusoidal]] tone of the two frequencies (697 and 1209 [[hertz]] (Hz)).  The original keypads had levers inside, so each button activated two contacts.  The multiple tones are the reason for calling the system multifrequency.  These tones are then decoded by the switching center to determine which key was pressed.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The DTMF keypad is laid out in a 4&times;4 matrix, with each row representing a ''low'' frequency, and each column representing a ''high'' frequency.  Pressing a single key (such as '1' ) will send a [[sinusoidal]] tone of the two frequencies (697 and 1209 [[hertz]] (Hz)).  The original keypads had levers inside, so each button activated two contacts.  The multiple tones are the reason for calling the system multifrequency.  These tones are then decoded by the switching center to determine which key was pressed.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>{|</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{|<ins class="diffchange diffchange-inline">border=1</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|+ DTMF keypad frequencies (with sound clips)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|+ DTMF keypad frequencies (with sound clips)</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-border=1</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-border=1</div></td></tr>
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Heth
http://mars.merhot.dk/w/index.php?title=DTMF&diff=1288&oldid=prev
Heth at 11:10, 16 February 2009
2009-02-16T11:10:21Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 11:10, 16 February 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3" >Line 3:</td>
<td colspan="2" class="diff-lineno">Line 3:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The DTMF keypad is laid out in a 4&times;4 matrix, with each row representing a ''low'' frequency, and each column representing a ''high'' frequency.  Pressing a single key (such as '1' ) will send a [[sinusoidal]] tone of the two frequencies (697 and 1209 [[hertz]] (Hz)).  The original keypads had levers inside, so each button activated two contacts.  The multiple tones are the reason for calling the system multifrequency.  These tones are then decoded by the switching center to determine which key was pressed.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The DTMF keypad is laid out in a 4&times;4 matrix, with each row representing a ''low'' frequency, and each column representing a ''high'' frequency.  Pressing a single key (such as '1' ) will send a [[sinusoidal]] tone of the two frequencies (697 and 1209 [[hertz]] (Hz)).  The original keypads had levers inside, so each button activated two contacts.  The multiple tones are the reason for calling the system multifrequency.  These tones are then decoded by the switching center to determine which key was pressed.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>{| <del class="diffchange diffchange-inline">class="wikitable"</del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{|</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|+ DTMF keypad frequencies (with sound clips)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|+ DTMF keypad frequencies (with sound clips)</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-border=1</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-border=1</div></td></tr>
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Heth
http://mars.merhot.dk/w/index.php?title=DTMF&diff=1287&oldid=prev
Heth: /* Keypad */
2009-02-16T11:10:06Z
<p><span dir="auto"><span class="autocomment">Keypad</span></span></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 11:10, 16 February 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l5" >Line 5:</td>
<td colspan="2" class="diff-lineno">Line 5:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{| class="wikitable"</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{| class="wikitable"</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|+ DTMF keypad frequencies (with sound clips)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|+ DTMF keypad frequencies (with sound clips)</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>|-<ins class="diffchange diffchange-inline">border=1</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>!align=center|</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>!align=center|</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>!align=center| 1209 Hz</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>!align=center| 1209 Hz</div></td></tr>
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Heth
http://mars.merhot.dk/w/index.php?title=DTMF&diff=1286&oldid=prev
Heth: New page: ==Keypad== {{main|Telephone keypad}} The DTMF keypad is laid out in a 4×4 matrix, with each row representing a ''low'' frequency, and each column representing a ''high'' frequency. ...
2009-02-16T11:09:44Z
<p>New page: ==Keypad== {{main|Telephone keypad}} The DTMF keypad is laid out in a 4×4 matrix, with each row representing a ''low'' frequency, and each column representing a ''high'' frequency. ...</p>
<p><b>New page</b></p><div>==Keypad==<br />
{{main|Telephone keypad}}<br />
The DTMF keypad is laid out in a 4&times;4 matrix, with each row representing a ''low'' frequency, and each column representing a ''high'' frequency. Pressing a single key (such as '1' ) will send a [[sinusoidal]] tone of the two frequencies (697 and 1209 [[hertz]] (Hz)). The original keypads had levers inside, so each button activated two contacts. The multiple tones are the reason for calling the system multifrequency. These tones are then decoded by the switching center to determine which key was pressed.<br />
<br />
{| class="wikitable"<br />
|+ DTMF keypad frequencies (with sound clips)<br />
|-<br />
!align=center|<br />
!align=center| 1209 Hz<br />
!align=center| 1336 Hz<br />
!align=center| 1477 Hz<br />
!align=center| 1633 Hz<br />
|-<br />
!align=center| 697 Hz<br />
|align=center| [[:Media:Dtmf1.ogg|1]]<br />
|align=center| [[:Media:Dtmf2.ogg|2]]<br />
|align=center| [[:Media:Dtmf3.ogg|3]]<br />
|align=center| [[:Media:DtmfA.ogg|A]]<br />
|-<br />
!align=center| 770 Hz<br />
|align=center| [[:Media:Dtmf4.ogg|4]]<br />
|align=center| [[:Media:Dtmf5.ogg|5]]<br />
|align=center| [[:Media:Dtmf6.ogg|6]]<br />
|align=center| [[:Media:DtmfB.ogg|B]]<br />
|-<br />
!align=center| 852 Hz<br />
|align=center| [[:Media:Dtmf7.ogg|7]]<br />
|align=center| [[:Media:Dtmf8.ogg|8]]<br />
|align=center| [[:Media:Dtmf9.ogg|9]]<br />
|align=center| [[:Media:DtmfC.ogg|C]]<br />
|-<br />
!align=center| 941 Hz<br />
|align=center| [[:Media:DtmfStar.ogg|*]]<br />
|align=center| [[:Media:Dtmf0.ogg|0]]<br />
|align=center| [[:Media:Dtmf-.ogg|#]]<br />
|align=center| [[:Media:DtmfD.ogg|D]]<br />
|}</div>
Heth