diff --git a/resources/templates/provision/poly/edge-e550/{$mac}.cfg b/resources/templates/provision/poly/edge-e550/{$mac}.cfg
index 2b2a2f4de0..3ed89a21d6 100644
--- a/resources/templates/provision/poly/edge-e550/{$mac}.cfg
+++ b/resources/templates/provision/poly/edge-e550/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/5.x/{$mac}.cfg b/resources/templates/provision/polycom/5.x/{$mac}.cfg
index 88e7a300d5..4b787f8619 100644
--- a/resources/templates/provision/polycom/5.x/{$mac}.cfg
+++ b/resources/templates/provision/polycom/5.x/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/6.x/{$mac}.cfg b/resources/templates/provision/polycom/6.x/{$mac}.cfg
index 88e7a300d5..4b787f8619 100644
--- a/resources/templates/provision/polycom/6.x/{$mac}.cfg
+++ b/resources/templates/provision/polycom/6.x/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx101/{$mac}.cfg b/resources/templates/provision/polycom/vvx101/{$mac}.cfg
index 25375b6955..8f9a8e441d 100644
--- a/resources/templates/provision/polycom/vvx101/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx101/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx150/{$mac}.cfg b/resources/templates/provision/polycom/vvx150/{$mac}.cfg
index ba5195201f..01378b9214 100644
--- a/resources/templates/provision/polycom/vvx150/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx150/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx1500/{$mac}.cfg b/resources/templates/provision/polycom/vvx1500/{$mac}.cfg
index 1acf6be295..bb812793b9 100644
--- a/resources/templates/provision/polycom/vvx1500/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx1500/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx201/{$mac}.cfg b/resources/templates/provision/polycom/vvx201/{$mac}.cfg
index a1f1761606..bc648773fc 100644
--- a/resources/templates/provision/polycom/vvx201/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx201/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx250/{$mac}.cfg b/resources/templates/provision/polycom/vvx250/{$mac}.cfg
index 8062b7e009..59ca471b30 100644
--- a/resources/templates/provision/polycom/vvx250/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx250/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx300/{$mac}.cfg b/resources/templates/provision/polycom/vvx300/{$mac}.cfg
index 7c677fe328..3e799f9903 100644
--- a/resources/templates/provision/polycom/vvx300/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx300/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx301/{$mac}.cfg b/resources/templates/provision/polycom/vvx301/{$mac}.cfg
index 2504ab61f2..0bd54b3b8d 100644
--- a/resources/templates/provision/polycom/vvx301/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx301/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx310/{$mac}.cfg b/resources/templates/provision/polycom/vvx310/{$mac}.cfg
index ac599147df..5b4b92fd6c 100644
--- a/resources/templates/provision/polycom/vvx310/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx310/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx311/{$mac}.cfg b/resources/templates/provision/polycom/vvx311/{$mac}.cfg
index 952cb7a966..f4abf4bf58 100644
--- a/resources/templates/provision/polycom/vvx311/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx311/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx350/{$mac}.cfg b/resources/templates/provision/polycom/vvx350/{$mac}.cfg
index 4cc3deef87..6bb3b723fa 100644
--- a/resources/templates/provision/polycom/vvx350/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx350/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx400/{$mac}.cfg b/resources/templates/provision/polycom/vvx400/{$mac}.cfg
index 9359491cc6..24b357a1d8 100644
--- a/resources/templates/provision/polycom/vvx400/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx400/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx401/{$mac}.cfg b/resources/templates/provision/polycom/vvx401/{$mac}.cfg
index 925b9281d9..6fb452f515 100644
--- a/resources/templates/provision/polycom/vvx401/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx401/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx410/{$mac}.cfg b/resources/templates/provision/polycom/vvx410/{$mac}.cfg
index 9dd56ac7ae..7e9857015f 100644
--- a/resources/templates/provision/polycom/vvx410/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx410/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx411/{$mac}.cfg b/resources/templates/provision/polycom/vvx411/{$mac}.cfg
index ddd8369fba..f9260c67da 100644
--- a/resources/templates/provision/polycom/vvx411/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx411/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx450/{$mac}.cfg b/resources/templates/provision/polycom/vvx450/{$mac}.cfg
index 524d84862d..123806136d 100644
--- a/resources/templates/provision/polycom/vvx450/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx450/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx500/{$mac}.cfg b/resources/templates/provision/polycom/vvx500/{$mac}.cfg
index 5002e36d30..6a404ef3d0 100644
--- a/resources/templates/provision/polycom/vvx500/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx500/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx501/{$mac}.cfg b/resources/templates/provision/polycom/vvx501/{$mac}.cfg
index be909bdfdc..d0cd9652d6 100644
--- a/resources/templates/provision/polycom/vvx501/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx501/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx600/{$mac}.cfg b/resources/templates/provision/polycom/vvx600/{$mac}.cfg
index 77f8121759..9973344d87 100644
--- a/resources/templates/provision/polycom/vvx600/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx600/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}
diff --git a/resources/templates/provision/polycom/vvx601/{$mac}.cfg b/resources/templates/provision/polycom/vvx601/{$mac}.cfg
index 07caed48a8..4343c9fde0 100644
--- a/resources/templates/provision/polycom/vvx601/{$mac}.cfg
+++ b/resources/templates/provision/polycom/vvx601/{$mac}.cfg
@@ -144,7 +144,7 @@
 		tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="0"
 	/>
 	<DIALPLAN
-		{if $polycom_emergency_customized}
+		{if filter_var($polycom_emergency_customized, FILTER_VALIDATE_BOOLEAN)}
 			dialplan.routing.server.1.address="{$polycom_emergency_server}"
 			dialplan.routing.server.1.port="{$polycom_emergency_port}"
 				{foreach $polycom_emergency_number as $number name=emergencynumbers}