+=item default_detailnum
+
+Optional rate detail to apply when a call doesn't match any region in the
+rate plan. If this is not set, the call will either be left unrated (though
+it may still be processed under a different pricing addon package), or be
+marked as 'skipped', or throw a fatal error, depending on the setting of
+the 'ignore_unrateable' package option.
+
+=item
+