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<title>Modem detection: ModemManager Reference Manual</title>
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<div class="chapter">
<div class="titlepage"><div><div><h2 class="title">
<a name="ref-overview-modem-detection"></a>Modem detection</h2></div></div></div>
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<dt><span class="section"><a href="ref-overview-modem-detection.html#id-1.2.3.2">Builds with udev support</a></span></dt>
<dt><span class="section"><a href="ch02s02.html">Builds without udev support</a></span></dt>
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<a name="id-1.2.3.2"></a>Builds with udev support</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 consider for probing each of the ports
marked with the <span class="emphasis"><em>ID_MM_CANDIDATE</em></span> tag in udev.
</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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