diff --git a/resources/templates/provision/polycom/4.x/{$mac}.cfg b/resources/templates/provision/polycom/4.x/{$mac}.cfg
index e3f4c4d1fb..9dc51a6f6f 100644
--- a/resources/templates/provision/polycom/4.x/{$mac}.cfg
+++ b/resources/templates/provision/polycom/4.x/{$mac}.cfg
@@ -115,6 +115,7 @@
 		diags.pcap.remote.enabled="0"
 	/>
 	<GENERAL
+		nat.keepalive.interval="30"
 		voIpProt.SIP.specialEvent.checkSync.alwaysReboot="1"
 		feature.broadsoftUcOne.enabled="0"
 		voice.volume.persist.handset="1"