now this is interesting

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@6570 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/directory/default/default.xml

@@ -0,0 +1,10 @@
+<include>
+  <user id="default"> <!--if id is numeric mailbox param is not necessary-->
+    <variables>
+      <!--all variables here will be set on all inbound calls that originate from this user -->
+      <!-- set these to take advantage of a dialplan localized to this user -->
+      <variable name="numbering_plan" value="US"/>
+      <!-- <variable name="default_area_code" value="434"/> -->
+    </variables>
+  </user>
+</include>