diff --git a/resources/templates/provision/yealink/t22p/{$mac}.cfg b/resources/templates/provision/yealink/t22p/{$mac}.cfg
index 7fef6e9bfc..ce904e36e6 100644
--- a/resources/templates/provision/yealink/t22p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t22p/{$mac}.cfg
@@ -223,8 +223,8 @@ account.1.nat.stun_server =
 #Configure the STUN server port, the default value is 3478.
 account.1.nat.stun_port = 
 
-#Enable or disable the NAT keep-alive; 0-Disabled, 1-Enabled (default);
-account.1.nat.udp_update_enable = 
+#Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 
diff --git a/resources/templates/provision/yealink/t23g/{$mac}.cfg b/resources/templates/provision/yealink/t23g/{$mac}.cfg
index e09d088c44..8641aa3259 100644
--- a/resources/templates/provision/yealink/t23g/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t23g/{$mac}.cfg
@@ -126,7 +126,7 @@ account.1.nat.stun_server =
 account.1.nat.stun_port = 3478
 
 #Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
-account.1.nat.udp_update_enable = 1
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 30
diff --git a/resources/templates/provision/yealink/t23p/{$mac}.cfg b/resources/templates/provision/yealink/t23p/{$mac}.cfg
index e09d088c44..8641aa3259 100644
--- a/resources/templates/provision/yealink/t23p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t23p/{$mac}.cfg
@@ -126,7 +126,7 @@ account.1.nat.stun_server =
 account.1.nat.stun_port = 3478
 
 #Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
-account.1.nat.udp_update_enable = 1
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 30
diff --git a/resources/templates/provision/yealink/t26p/{$mac}.cfg b/resources/templates/provision/yealink/t26p/{$mac}.cfg
index ecc4c4997b..2761774eaa 100644
--- a/resources/templates/provision/yealink/t26p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t26p/{$mac}.cfg
@@ -223,8 +223,8 @@ account.1.nat.stun_server =
 #Configure the STUN server port, the default value is 3478.
 account.1.nat.stun_port = 
 
-#Enable or disable the NAT keep-alive; 0-Disabled, 1-Enabled (default);
-account.1.nat.udp_update_enable = 
+#Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 
diff --git a/resources/templates/provision/yealink/t27p/{$mac}.cfg b/resources/templates/provision/yealink/t27p/{$mac}.cfg
index e09d088c44..8641aa3259 100644
--- a/resources/templates/provision/yealink/t27p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t27p/{$mac}.cfg
@@ -126,7 +126,7 @@ account.1.nat.stun_server =
 account.1.nat.stun_port = 3478
 
 #Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
-account.1.nat.udp_update_enable = 1
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 30
diff --git a/resources/templates/provision/yealink/t28p/{$mac}.cfg b/resources/templates/provision/yealink/t28p/{$mac}.cfg
index ecc4c4997b..2761774eaa 100644
--- a/resources/templates/provision/yealink/t28p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t28p/{$mac}.cfg
@@ -223,8 +223,8 @@ account.1.nat.stun_server =
 #Configure the STUN server port, the default value is 3478.
 account.1.nat.stun_port = 
 
-#Enable or disable the NAT keep-alive; 0-Disabled, 1-Enabled (default);
-account.1.nat.udp_update_enable = 
+#Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 
diff --git a/resources/templates/provision/yealink/t29g/{$mac}.cfg b/resources/templates/provision/yealink/t29g/{$mac}.cfg
index e09d088c44..8641aa3259 100644
--- a/resources/templates/provision/yealink/t29g/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t29g/{$mac}.cfg
@@ -126,7 +126,7 @@ account.1.nat.stun_server =
 account.1.nat.stun_port = 3478
 
 #Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
-account.1.nat.udp_update_enable = 1
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 30
diff --git a/resources/templates/provision/yealink/t32g/{$mac}.cfg b/resources/templates/provision/yealink/t32g/{$mac}.cfg
index b7de551e22..a7f7534e5e 100644
--- a/resources/templates/provision/yealink/t32g/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t32g/{$mac}.cfg
@@ -223,8 +223,8 @@ account.1.nat.stun_server =
 #Configure the STUN server port, the default value is 3478.
 account.1.nat.stun_port = 
 
-#Enable or disable the NAT keep-alive; 0-Disabled, 1-Enabled (default);
-account.1.nat.udp_update_enable = 
+#Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 
diff --git a/resources/templates/provision/yealink/t38g/{$mac}.cfg b/resources/templates/provision/yealink/t38g/{$mac}.cfg
index e2f464c29b..cffa4df9dc 100644
--- a/resources/templates/provision/yealink/t38g/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t38g/{$mac}.cfg
@@ -223,8 +223,8 @@ account.1.nat.stun_server =
 #Configure the STUN server port, the default value is 3478.
 account.1.nat.stun_port = 
 
-#Enable or disable the NAT keep-alive; 0-Disabled, 1-Enabled (default);
-account.1.nat.udp_update_enable = 
+#Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 
diff --git a/resources/templates/provision/yealink/t41p/{$mac}.cfg b/resources/templates/provision/yealink/t41p/{$mac}.cfg
index e09d088c44..8641aa3259 100644
--- a/resources/templates/provision/yealink/t41p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t41p/{$mac}.cfg
@@ -126,7 +126,7 @@ account.1.nat.stun_server =
 account.1.nat.stun_port = 3478
 
 #Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
-account.1.nat.udp_update_enable = 1
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 30
diff --git a/resources/templates/provision/yealink/t42g/{$mac}.cfg b/resources/templates/provision/yealink/t42g/{$mac}.cfg
index 94d6cc28a1..70c98e9022 100644
--- a/resources/templates/provision/yealink/t42g/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t42g/{$mac}.cfg
@@ -126,7 +126,7 @@ account.1.nat.stun_server =
 account.1.nat.stun_port = 3478
 
 #Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
-account.1.nat.udp_update_enable = 1
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 30
diff --git a/resources/templates/provision/yealink/vp530/{$mac}.cfg b/resources/templates/provision/yealink/vp530/{$mac}.cfg
index a380a3f81d..b35405d03e 100644
--- a/resources/templates/provision/yealink/vp530/{$mac}.cfg
+++ b/resources/templates/provision/yealink/vp530/{$mac}.cfg
@@ -253,8 +253,8 @@ account.1.nat.stun_server =
 #Configure the STUN server port, the default value is 3478.
 account.1.nat.stun_port = 
 
-#Enable or disable the NAT keep-alive; 0-Disabled, 1-Enabled (default);
-account.1.nat.udp_update_enable = 
+#Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time = 
diff --git a/resources/templates/provision/yealink/w52p/{$mac}.cfg b/resources/templates/provision/yealink/w52p/{$mac}.cfg
index a6bc0d586a..2509a41fbf 100644
--- a/resources/templates/provision/yealink/w52p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/w52p/{$mac}.cfg
@@ -147,8 +147,8 @@ account.1.nat.stun_server =
 #Configure the STUN server port, the default value is 3478.
 account.1.nat.stun_port = 
 
-#Enable or disable the NAT keep-alive; 0-Disabled, 1-Enabled (default);
-account.1.nat.udp_update_enable = 
+#Enable or disable the NAT keep-alive; 0-Disabled, 1-Default (default), 2-Option, 3-Notify;
+account.1.nat.udp_update_enable = 3
 
 #Specify the keep-alive interval (in seconds), the default value is 30.
 account.1.nat.udp_update_time =