diff --git a/resources/templates/provision/grandstream/gxw410x/{$mac}.xml b/resources/templates/provision/grandstream/gxw410x/{$mac}.xml
index 2f3fbff187..db028c95df 100644
--- a/resources/templates/provision/grandstream/gxw410x/{$mac}.xml
+++ b/resources/templates/provision/grandstream/gxw410x/{$mac}.xml
@@ -97,7 +97,7 @@
     <!--  Unregister On Reboot. 0 - no, 1 - yes -->
     <P81>0</P81>
     <!--  Register Expiration (in minutes. default 1 hour, max 45 days) -->
-    <P32>3</P32>
+    <P32>{math equation="x / y" x=$account.1.register_expires y=40}</P32>
     <!--  Registration Failure Retry Wait Time (in seconds. Between 1-3600, default is 20) -->
     <P138>20</P138>
     <!--  SIP Transport. 1 - UDP, 2 - TCP , (default is UDP) -->
@@ -170,7 +170,7 @@
     <!--  Unregister on Reboot. 0 - no, 1 - yes -->
     <P411>0</P411>
     <!--  Register Expiration (in minutes. default 1 hour, max 45 days) -->
-    <P412>3</P412>
+    <P412>{math equation="x / y" x=$account.2.register_expires y=40}</P412>
     <!--  Registration Failure Retry Wait Time (in seconds. Between 1-3600, default is 20) -->
     <P471>20</P471>
     <!--  SIP Transport. 1 - UDP, 2 - TCP , (default is UDP) -->
@@ -242,7 +242,7 @@
     <!--  Unregister on Reboot. 0 - no, 1 - yes -->
     <P511>0</P511>
     <!--  Register Expiration (in minutes. default 1 hour, max 45 days) -->
-    <P512>3</P512>
+    <P512>{math equation="x / y" x=$account.3.register_expires y=40}</P512>
     <!--  Registration Failure Retry Wait Time (in seconds. Between 1-3600, default is 20) -->
     <P571>20</P571>
     <!--  SIP Transport. 1 - UDP, 2 - TCP , (default is UDP) -->