diff --git a/resources/templates/provision/yealink/t46s/{$mac}.cfg b/resources/templates/provision/yealink/t46s/{$mac}.cfg
index 08a474902f..d118d436b8 100644
--- a/resources/templates/provision/yealink/t46s/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t46s/{$mac}.cfg
@@ -129,7 +129,12 @@ account.1.outbound_proxy.2.port = {$outbound_proxy_2_port}
 account.1.outbound_proxy.2.port = 5060
 {/if}
 
-account.1.outbound_proxy_fallback_interval=
+{if isset($outbound_proxy_fallback_interval)}
+account.1.outbound_proxy_fallback_interval = {$outbound_proxy_fallback_interval}
+{else}
+account.1.outbound_proxy_fallback_interval = 120
+{/if}
+
 account.1.nat.nat_traversal=