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<div class="chapter">
<div class="titlepage"><div><div><h2 class="title">
<a name="ref-overview-modem-detection-and-setup"></a>Modem detection and setup</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="ref-overview-modem-detection-and-setup.html#idm211863910672">Detection mechanisms</a></span></dt>
<dt><span class="section"><a href="ch02s02.html">Probing</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="ch02s02.html#idm211863905456">Pre-probing filters</a></span></dt>
<dt><span class="section"><a href="ch02s02.html#idm211854553632">Probing sequence</a></span></dt>
<dt><span class="section"><a href="ch02s02.html#idm211864004288">Post-probing filters</a></span></dt>
<dt><span class="section"><a href="ch02s02.html#idm211856775152">Probing setup examples</a></span></dt>
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<dt><span class="section"><a href="ch02s03.html">Port grabbing and Modem object creation</a></span></dt>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="idm211863910672"></a>Detection mechanisms</h2></div></div></div>
<p>
ModemManager requires <span class="emphasis"><em>udev</em></span>-powered Linux kernels in order
to get notified of possible available Modems. udev will report each of the ports
found in the device, and ModemManager will probe each of the ports marked with
the <span class="emphasis"><em>ID_MM_CANDIDATE</em></span> tag in udev. This includes both "tty"
and "net" ports.
</p>
<p>
Aditionally, users of RS232-based devices may need to request additional manual
scans via DBus, in order to detect modems that may have been connected to
RS232 to USB adapters. In this case, udev just knows about the USB adapter being
connected, not about the RS232 modem connected to the adapter, if any.
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