diff --git a/resources/templates/provision/yealink/t43u/y000000000107.cfg b/resources/templates/provision/yealink/t43u/y000000000107.cfg
index b6ed626b4a..e74c36eacf 100644
--- a/resources/templates/provision/yealink/t43u/y000000000107.cfg
+++ b/resources/templates/provision/yealink/t43u/y000000000107.cfg
@@ -376,12 +376,20 @@ static.security.dev_cert =
 static.security.ca_cert = 
 static.security.trust_certificates = {$yealink_trust_certificates}
 
-static.security.user_password = {$var_name}:{$var_password}
-static.security.user_password = {$admin_name}:{$admin_password}
-static.security.user_password = {$user_name}:{$user_password}
-static.security.user_name.var = {$var_name}
-static.security.user_name.admin = {$admin_name}
+{if isset($user_name) }
 static.security.user_name.user = {$user_name}
+static.security.user_password = {$user_name}:{$user_password}
+{/if}
+
+{if isset($admin_name) }
+static.security.user_name.admin = {$admin_name}
+static.security.user_password = {$admin_name}:{$admin_password}
+{/if}
+
+{if isset($var_name) }
+static.security.user_name.var = {$var_name}
+static.security.user_password = {$var_name}:{$var_password}
+{/if}
 
 ##V83 Add
 static.security.default_access_level =