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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Milliwatt()</title><link rel="stylesheet" href="styles.css" type="text/css" /><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /><link rel="start" href="index.html" title="Asterisk™: The Future of Telephony" /><link rel="up" href="asterisk-APP-B.html" title="Appendix B. Application Reference" /><link rel="prev" href="asterisk-APP-B-113.html" title="MeetMeCount()" /><link rel="next" href="asterisk-APP-B-303.html" title="MixMonitor()" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Milliwatt()</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="asterisk-APP-B-113.html">Prev</a> </td><th width="60%" align="center">Appendix B. Application Reference</th><td width="20%" align="right"> <a accesskey="n" href="asterisk-APP-B-303.html">Next</a></td></tr></table><hr /></div><div class="refentry" lang="en" xml:lang="en"><a id="asterisk-APP-B-115"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>Milliwatt() — Generates a 1,000 Hz tone</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><a id="I_programlisting_tt2287"></a><pre class="programlisting">Milliwatt()</pre></div><div class="refsect1" lang="en" xml:lang="en"><a id="id4189769"></a><h2></h2><p><a id="I_indexterm_tt2288" class="indexterm"></a>This application generates a constant 1,000 Hz tone at 0
dbm (μlaw). This application is often used for testing the audio
properties of a particular channel. <a id="I_programlisting_tt2289"></a></p><pre class="programlisting">; generate a 1000HZ tone
<span class="strong"><strong>exten => 123,1,Milliwatt()</strong></span>
</pre><div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Warning</h3><p>Please note that there is a service that the carriers use to
test circuits for loss, that folks in the industry have nicknamed
“1,000-cycles.” The thing is, the tone the carrier equipment sends
is actually 1,004 Hz, so if you want to test circuit loss on an
analog channel from Asterisk, <code class="literal">Milliwatt()</code> may not give you exactly
what you want.</p></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="asterisk-APP-B-116"></a><h2>See Also</h2><p><a href="asterisk-APP-B-63.html" title="Echo()"><span class="refentrytitle">Echo()</span></a>, <a href="asterisk-APP-B-136.html" title="Playtones()"><span class="refentrytitle">Playtones()</span></a></p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="asterisk-APP-B-113.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="asterisk-APP-B.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="asterisk-APP-B-303.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">MeetMeCount() </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> MixMonitor()</td></tr></table></div><div xmlns="" id="svn-footer"><hr /><p>You are reading <em>Asterisk: The Future of Telephony</em> (2nd Edition for Asterisk 1.4), by Jim van Meggelen, Jared Smith, and Leif Madsen.<br />
This work is licensed under the <a href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Attribution-Noncommercial-No Derivative Works License v3.0</a>.<br />
To submit comments, corrections, or other contributions to the text, please visit <a href="http://oreilly.com/catalog/9780596510480/">http://www.oreilly.com/</a>.</p></div></body></html>
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