diff --git a/conf/dialplan/default.xml b/conf/dialplan/default.xml
index c93fea429f..c31d644f63 100644
--- a/conf/dialplan/default.xml
+++ b/conf/dialplan/default.xml
@@ -86,6 +86,16 @@
 	<!-- Offer SRTP on outbound legs if we have it on inbound. -->
 	<!-- <action application="export" data="sip_secure_media=true"/> -->
       </condition>
+
+      <!-- 
+	   This will cause us to not enable SRTP on known broken 3.x.x Polycom Firmware.
+      -->
+      <condition field="${sip_secure_media}" expression="^true$" break="never"/>
+      <condition field="${sip_user_agent}" expression="^PolycomSound(Point|Station)IP-S(S|P)IP_\d{3,4}-UA\/((3).(\d).(\d).(\d{4}))$" break="never">
+	<action application="set" data="sip_secure_media=false"/>
+	<action application="log" data="crit Your phone is a Polycom running 3.x firmware that is known broken for SRTP."/>
+      </condition>
+
       <condition>
 	<action application="hash" data="insert/${domain_name}-spymap/${caller_id_number}/${uuid}"/>
 	<action application="hash" data="insert/${domain_name}-last_dial/${caller_id_number}/${destination_number}"/>