diff --git a/resources/templates/provision/grandstream/ht503/{$mac}.xml b/resources/templates/provision/grandstream/ht503/{$mac}.xml
index 9c928daca5..d0989c927d 100644
--- a/resources/templates/provision/grandstream/ht503/{$mac}.xml
+++ b/resources/templates/provision/grandstream/ht503/{$mac}.xml
@@ -683,7 +683,12 @@
 
 <!--  Dial Plan -->
 <!--  String -->
+	
+{if isset($grandstream_dial_plan) }
 <P4200>{$grandstream_dial_plan}</P4200>
+{else}
+<P4200>{literal}{x+|*x+|*++|\p\a\r\k\+*x+| \f\l\o\w\+*x+}{/literal}</P4200>
+{/if}
 
 <!--  SUBSCRIBE for MWI. 0 - No, 1 - Yes -->
 <!--  Number: 0, 1 -->