diff --git a/resources/templates/provision/yealink/t52s/{$mac}.cfg b/resources/templates/provision/yealink/t52s/{$mac}.cfg
index 030f1eaa47..e7d3fef2b5 100644
--- a/resources/templates/provision/yealink/t52s/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t52s/{$mac}.cfg
@@ -420,7 +420,7 @@ account.1.sip_server.2.invite_retry_counts=
 account.1.static_cache_pri=
 account.1.dns_cache_type=
 account.1.naptr_build=
-account.1.fallback.timeout=
+account.1.fallback.timeout = {$yealink_outbound_proxy_fallback_interval}
 account.1.fallback.redundancy_type=
 account.1.reg_failed_retry_max_time=
 account.1.reg_failed_retry_min_time=
@@ -459,7 +459,7 @@ account.2.sip_server.2.invite_retry_counts=
 account.2.static_cache_pri=
 account.2.dns_cache_type=
 account.2.naptr_build=
-account.2.fallback.timeout=
+account.2.fallback.timeout = {$yealink_outbound_proxy_fallback_interval}
 account.2.fallback.redundancy_type=
 account.2.reg_failed_retry_max_time=
 account.2.reg_failed_retry_min_time=