<Dashboard> or <CallButtons>
...
<Button>
<title>Dial</title>
<action>DIAL</action>
<value></value>
<enabled>true</enabled>
<confirm>false</confirm>
<description>Custom dial button</description>
<bg_color>#FF001425</bg_color>
<fg_color>#FFFFFFFF</fg_color>
<icon>dialbtn.png</icon>
</Button>
...
<Dashboard> or <CallButtons>