diff --git a/resources/templates/provision/grandstream/gxp20xx/{$mac}.xml b/resources/templates/provision/grandstream/gxp20xx/{$mac}.xml
index a3ebc0aa82..aaf09eb29e 100644
--- a/resources/templates/provision/grandstream/gxp20xx/{$mac}.xml
+++ b/resources/templates/provision/grandstream/gxp20xx/{$mac}.xml
@@ -327,7 +327,12 @@
 <P47>{$server_address_1}</P47>
 
 <!--  Outbound Proxy -->
-<P48></P48>
+<!--  String -->
+<P48>{$outbound_proxy_1}</P48>
+
+<!--  Backup Outbound Proxy -->
+<!--  String -->
+<!-- <P2333>{$outbound_proxy_secondary_1}</P2333> -->
 
 <!--  SIP User ID -->
 <P35>{$user_id_1}</P35>