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	<id>https://onnocenter.or.id/wiki/index.php?action=history&amp;feed=atom&amp;title=VoIP_Cookbook%3A_Predefined_Extension_Names</id>
	<title>VoIP Cookbook: Predefined Extension Names - Revision history</title>
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	<updated>2026-05-03T23:34:41Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://onnocenter.or.id/wiki/index.php?title=VoIP_Cookbook:_Predefined_Extension_Names&amp;diff=17344&amp;oldid=prev</id>
		<title>Onnowpurbo at 07:29, 9 March 2010</title>
		<link rel="alternate" type="text/html" href="https://onnocenter.or.id/wiki/index.php?title=VoIP_Cookbook:_Predefined_Extension_Names&amp;diff=17344&amp;oldid=prev"/>
		<updated>2010-03-09T07:29:58Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left diff-editfont-monospace&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
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				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 07:29, 9 March 2010&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;An extension can be a series of numbers or a pattern. Extension can be a series of number, like 123, and may also contain some standard symbols * and #, which are available on the phone keypad. So 34#76 is &lt;/del&gt;a &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;valid extension &lt;/del&gt;number&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;. Some keypads are labeled A, B, C, and D.  Because &lt;/del&gt;of &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;this, extension can also be defined based on letters. So basically an &lt;/del&gt;extension &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;can be defined using both letters and numbers&lt;/del&gt;. &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Keep in note that there &lt;/del&gt;are &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;many VoIP phones that can call extension numbers consisting of text Sembang, like &amp;quot;Office&amp;quot;. Therefore it is not a problem to define such an extension name in Asterisk.&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Asterisk defines &lt;/ins&gt;a number of extension &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;names for specific needs&lt;/ins&gt;. &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;These extensions &lt;/ins&gt;are&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;: &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Are extension names case sensitive? Yes &lt;/del&gt;and &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;no. Extension case are sensitive because when Asterisk attempts to match the extension dialed by a user to extension that is defined in context, the extension name should be precisely matched, including uppercase letters and small. Therefore, if a user calls extension &amp;quot;OFFICE&amp;quot; through their VoIP phone, Asterisk will not immediately run the commands we define for extension &amp;quot;Office&amp;quot;. But in reality, extension names are not case sensitive in the sense that we cannot define different extensions based only on uppercase/ lowercase letters. It means we do not define the command for extension &amp;quot;Office&amp;quot; and &amp;quot;OFFICE&amp;quot; in a context&lt;/del&gt;.  &lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; i	: Invalid &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; s	: Start &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; h	: Hangup &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; t	: Timeout &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; T	: AbsoluteTimeout &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; o	: Operator &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; 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;&quot;&gt;&lt;div&gt;and &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;many more&lt;/ins&gt;.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==See Also==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==See Also==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Onnowpurbo</name></author>
	</entry>
	<entry>
		<id>https://onnocenter.or.id/wiki/index.php?title=VoIP_Cookbook:_Predefined_Extension_Names&amp;diff=17342&amp;oldid=prev</id>
		<title>Onnowpurbo: New page: An extension can be a series of numbers or a pattern. Extension can be a series of number, like 123, and may also contain some standard symbols * and #, which are available on the phone ke...</title>
		<link rel="alternate" type="text/html" href="https://onnocenter.or.id/wiki/index.php?title=VoIP_Cookbook:_Predefined_Extension_Names&amp;diff=17342&amp;oldid=prev"/>
		<updated>2010-03-09T07:24:37Z</updated>

		<summary type="html">&lt;p&gt;New page: An extension can be a series of numbers or a pattern. Extension can be a series of number, like 123, and may also contain some standard symbols * and #, which are available on the phone ke...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;An extension can be a series of numbers or a pattern. Extension can be a series of number, like 123, and may also contain some standard symbols * and #, which are available on the phone keypad. So 34#76 is a valid extension number. Some keypads are labeled A, B, C, and D.  Because of this, extension can also be defined based on letters. So basically an extension can be defined using both letters and numbers. Keep in note that there are many VoIP phones that can call extension numbers consisting of text Sembang, like &amp;quot;Office&amp;quot;. Therefore it is not a problem to define such an extension name in Asterisk.&lt;br /&gt;
&lt;br /&gt;
Are extension names case sensitive? Yes and no. Extension case are sensitive because when Asterisk attempts to match the extension dialed by a user to extension that is defined in context, the extension name should be precisely matched, including uppercase letters and small. Therefore, if a user calls extension &amp;quot;OFFICE&amp;quot; through their VoIP phone, Asterisk will not immediately run the commands we define for extension &amp;quot;Office&amp;quot;. But in reality, extension names are not case sensitive in the sense that we cannot define different extensions based only on uppercase/ lowercase letters. It means we do not define the command for extension &amp;quot;Office&amp;quot; and &amp;quot;OFFICE&amp;quot; in a context. &lt;br /&gt;
&lt;br /&gt;
==See Also==&lt;br /&gt;
&lt;br /&gt;
* [[VoIP Cookbook: Building your own Telecommunication Infrastructure]]&lt;br /&gt;
* [[VoIP Cookbook: More on Asterisk's Dialplan]]&lt;/div&gt;</summary>
		<author><name>Onnowpurbo</name></author>
	</entry>
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