<varlistentry>
<term><varname>MTUBytes=</varname></term>
<listitem>
- <para>The maximum transmission unit in bytes to set for the device.</para>
+ <para>The maximum transmission unit in bytes to set for
+ the device. The usual suffixes K, M, G, are supported and
+ are understood to the base of 1024.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>BitsPerSecond=</varname></term>
<listitem>
- <para>The speed to set for the device, the value is rounded down
- to the nearest Mbps.</para>
+ <para>The speed to set for the device, the value is
+ rounded down to the nearest Mbps. The usual suffixes K, M,
+ G, are supported and are understood to the base of
+ 1000.</para>
</listitem>
</varlistentry>
<varlistentry>