diff --git a/resources/templates/provision/yealink/t52s/y000000000074.cfg b/resources/templates/provision/yealink/t52s/y000000000074.cfg
index 54dba17914..6177c12780 100644
--- a/resources/templates/provision/yealink/t52s/y000000000074.cfg
+++ b/resources/templates/provision/yealink/t52s/y000000000074.cfg
@@ -594,19 +594,23 @@ phone_setting.early_media.rtp_sniffer.timeout=
 ################################################################
 #                        NAT&ICE                              ##
 ################################################################
-static.sip.nat_turn.enable=
-static.sip.nat_turn.username=
-static.sip.nat_turn.password=
-static.sip.nat_turn.server=
-static.sip.nat_turn.port=
+network.static_nat.enable = {if isset($yealink_static_nat)}1{else}0{/if}
 
-static.sip.nat_stun.enable=
-static.sip.nat_stun.server=
-static.sip.nat_stun.port=
+network.static_nat.addr = {$yealink_static_nat}
 
-static.ice.enable=
-static.network.static_nat.enable=
-static.network.static_nat.addr=
+ice.enable =
+
+sip.nat_stun.enable = {if isset($stun_server)}1{else}0{/if}
+
+sip.nat_stun.server = {$stun_server}
+sip.nat_stun.port = {if isset($stun_port)}{$stun_port}{else}3478{/if}
+
+
+sip.nat_turn.enable =
+sip.nat_turn.username =
+sip.nat_turn.password =
+sip.nat_turn.server =
+sip.nat_turn.port =
 
 
 #######################################################################################