diff --git a/resources/templates/provision/grandstream/gxp2135/{$mac}.xml b/resources/templates/provision/grandstream/gxp2135/{$mac}.xml
index a8de9984ca..66475e6f19 100644
--- a/resources/templates/provision/grandstream/gxp2135/{$mac}.xml
+++ b/resources/templates/provision/grandstream/gxp2135/{$mac}.xml
@@ -100,8 +100,8 @@
 <!--  NAT Traversal. 0 - No, 1 - STUN, 2 - keep alive, 3 - UPnP, 4 - Auto, 5 - VPN. Default is 0. -->
 <!--  Number: 0, 1, 2, 3, 4, 5 -->
 <!--  Mandatory -->
-{if isset($nat_traversal_1) }
-<P52>{$nat_traversal_1}</P52>
+{if isset($grandstream_nat_traversal_1) }
+<P52>{$grandstream_nat_traversal_1}</P52>
 {else}
 <P52>0</P52>
 {/if}
@@ -131,7 +131,7 @@
 <!--  Register Expiration (in minutes). Default is 60. Max about 45 days -->
 <!--  Number: 1 - 64800 -->
 <!--  Mandatory -->
-<P32>3</P32>
+<P32>{$register_expires_1}</P32>
 
 <!--  Subscribe Expiration. Default is 60. Max about 45 days -->
 <!--  Number: 1 - 64800 -->
@@ -869,8 +869,8 @@
 <!--  NAT Traversal. 0 - No, 1 - STUN, 2 - keep alive, 3 - UPnP, 4 - Auto, 5 - VPN. Default is 0 -->
 <!--  Number: 0, 1, 2, 3, 4, 5 -->
 <!--  Mandatory -->
-{if isset($nat_traversal_2) }
-<P414>{$nat_traversal_2}</P414>
+{if isset($grandstream_nat_traversal_2) }
+<P414>{$grandstream_nat_traversal_2}</P414>
 {else}
 <P414>0</P414>
 {/if}
@@ -900,7 +900,7 @@
 <!--  Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!--  Number: 1 - 64800 -->
 <!--  Mandatory -->
-<P412>3</P412>
+<P412>{$register_expires_2}</P412>
 
 <!--  Subscribe Expiration. Default is 60. Max about 45 days -->
 <!--  Number: 1 - 64800 -->
@@ -1623,8 +1623,8 @@
 <!--  NAT Traversal. 0 - No, 1 - STUN, 2 - keep alive, 3 - UPnP, 4 - Auto, 5 - VPN. Default is 0 -->
 <!--  Number: 0, 1, 2, 3, 4, 5 -->
 <!--  Mandatory -->
-{if isset($nat_traversal_3) }
-<P514>{$nat_traversal_3}</P514>
+{if isset($grandstream_nat_traversal_3) }
+<P514>{$grandstream_nat_traversal_3}</P514>
 {else}
 <P514>0</P514>
 {/if}
@@ -1654,7 +1654,7 @@
 <!--  Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!--  Number: 1 - 64800 -->
 <!--  Mandatory -->
-<P512>3</P512>
+<P512>{$register_expires_3}</P512>
 
 <!--  Subscribe Expiration. Default is 60. Max about 45 days -->
 <!--  Number: 1 - 64800 -->
@@ -2376,8 +2376,8 @@
 <!--  NAT Traversal. 0 - No, 1 - STUN, 2 - keep alive, 3 - UPnP, 4 - Auto, 5 - VPN. Default is 0 -->
 <!--  Number: 0, 1, 2, 3, 4, 5 -->
 <!--  Mandatory -->
-{if isset($nat_traversal_4) }
-<P614>{$nat_traversal_4}</P614>
+{if isset($grandstream_nat_traversal_4) }
+<P614>{$grandstream_nat_traversal_4}</P614>
 {else}
 <P614>0</P614>
 {/if}
@@ -2407,7 +2407,7 @@
 <!--  Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!--  Number: 1 - 64800 -->
 <!--  Mandatory -->
-<P612>3</P612>
+<P612>{$register_expires_4}</P612>
 
 <!--  Subscribe Expiration. Default is 60. Max about 45 days -->
 <!--  Number: 1 - 64800 -->
@@ -3131,8 +3131,8 @@
 <!--  NAT Traversal. 0 - No, 1 - STUN, 2 - keep alive, 3 - UPnP, 4 - Auto, 5 - VPN. Default is 0 -->
 <!--  Number: 0, 1, 2, 3, 4, 5 -->
 <!--  Mandatory -->
-{if isset($nat_traversal_5) }
-<P1714>{$nat_traversal_5}</P1714>
+{if isset($grandstream_nat_traversal_5) }
+<P1714>{$grandstream_nat_traversal_5}</P1714>
 {else}
 <P1714>0</P1714>
 {/if}
@@ -3162,7 +3162,7 @@
 <!--  Register Expiration (in minutes. default 1 hour, max 45 days) -->
 <!--  Number: 1-64800 -->
 <!--  Mandatory -->
-<P1712>3</P1712>
+<P1712>{$register_expires_5}</P1712>
 
 <!--  Subscribe Expiration. Default is 60. Max about 45 days -->
 <!--  Number: 1 - 64800 -->
@@ -3885,8 +3885,8 @@
 <!--  NAT Traversal. 0 - No, 1 - STUN, 2 - keep alive, 3 - UPnP, 4 - Auto, 5 - VPN. Default is 0 -->
 <!--  Number: 0, 1, 2, 3, 4, 5 -->
 <!--  Mandatory -->
-{if isset($nat_traversal_6) }
-<P1814>{$nat_traversal_6}</P1814>
+{if isset($grandstream_nat_traversal_6) }
+<P1814>{$grandstream_nat_traversal_6}</P1814>
 {else}
 <P1814>0</P1814>
 {/if}
@@ -3917,7 +3917,7 @@
 <!--  Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!--  Number: 1 - 64800 -->
 <!--  Mandatory -->
-<P1812>3</P1812>
+<P1812>{$register_expires_6}</P1812>
 
 <!--  Subscribe Expiration. Default is 60. Max about 45 days -->
 <!--  Number: 1 - 64800 -->
diff --git a/resources/templates/provision/grandstream/gxp2170/{$mac}.xml b/resources/templates/provision/grandstream/gxp2170/{$mac}.xml
index 963303e5d7..56983d5047 100644
--- a/resources/templates/provision/grandstream/gxp2170/{$mac}.xml
+++ b/resources/templates/provision/grandstream/gxp2170/{$mac}.xml
@@ -129,7 +129,7 @@
 <!-- # Register Expiration (in minutes). Default is 60. Max about 45 days -->
 <!-- # Number: 1 - 64800 -->
 <!-- # Mandatory -->
-<P32>60</P32>
+<P32>{$register_expires_1}</P32>
 
 <!-- # Subscribe Expiration. Default is 60. Max about 45 days -->
 <!-- # Number: 1 - 64800 -->
@@ -670,33 +670,33 @@
 
 <!-- # Matching Incoming Caller ID. Matching Rule 1 -->
 <!-- # String -->
-<P1488></P1488>
+<P1488>ring1</P1488>
 
 <!-- # Matching Rule 1 Distinctive Ringtone -->
 <!-- # 0 - system ring tone, 1 - custom ring tone 1, 2 - custom ring tone 2, 3 - custom ring tone 3, 4 - silent. Default is 0. -->
 <!-- # Number: 0, 1, 2, 3, 4 -->
 <!-- # Mandatory -->
-<P1489>0</P1489>
+<P1489>1</P1489>
 
 <!-- # Matching Incoming Caller ID. Matching Rule 2 -->
 <!-- # String -->
-<P1490></P1490>
+<P1490>ring2</P1490>
 
 <!-- # Matching Rule 2 Distinctive Ringtone -->
 <!-- # 0 - system ring tone, 1 - custom ring tone 1, 2 - custom ring tone 2, 3 - custom ring tone 3, 4 - silent. Default is 0. -->
 <!-- # Number: 0, 1, 2, 3, 4 -->
 <!-- # Mandatory -->
-<P1491>0</P1491>
+<P1491>2</P1491>
 
 <!-- # Matching Incoming Caller ID. Matching Rule 3 -->
 <!-- # String -->
-<P1492></P1492>
+<P1492>ring</P1492>
 
 <!-- # Matching Rule 3 Distinctive Ringtone -->
 <!-- # 0 - system ring tone, 1 - custom ring tone 1, 2 - custom ring tone 2, 3 - custom ring tone 3, 4 - silent. Default is 0. -->
 <!-- # Number: 0, 1, 2, 3, 4 -->
 <!-- # Mandatory -->
-<P1493>0</P1493>
+<P1493>3</P1493>
 
 <!-- # Ring Timeout (in seconds). Default is 60 -->
 <!-- # Number: 30 - 3600 -->
@@ -806,7 +806,8 @@
 <!-- #Enable Call Features.  0 - No, 1 - Yes. Default is 1 -->
 <!-- #Number: 0, 1  -->
 <!-- #Mandatory -->
-<P191>1</P191>
+<!-- # This must be 0 for FusionPBX features to work!!! -->
+<P191>0</P191>
 
 <!-- #Do Not Disturb (DND) - On -->
 <!-- # String -->
@@ -966,7 +967,7 @@
 <!-- # Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!-- # Number: 1 - 64800 -->
 <!-- # Mandatory -->
-<P412>60</P412>
+<P412>{$register_expires_2}</P412>
 
 <!-- # Subscribe Expiration. Default is 60. Max about 45 days -->
 <!-- # Number: 1 - 64800 -->
@@ -1803,7 +1804,7 @@
 <!-- # Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!-- # Number: 1 - 64800 -->
 <!-- # Mandatory -->
-<P512>60</P512>
+<P512>{$register_expires_3}</P512>
 
 <!-- # Subscribe Expiration. Default is 60. Max about 45 days -->
 <!-- # Number: 1 - 64800 -->
@@ -2639,7 +2640,7 @@
 <!-- # Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!-- # Number: 1 - 64800 -->
 <!-- # Mandatory -->
-<P612>60</P612>
+<P612>{$register_expires_4}</P612>
 
 <!-- # Subscribe Expiration. Default is 60. Max about 45 days -->
 <!-- # Number: 1 - 64800 -->
@@ -3477,7 +3478,7 @@
 <!-- # Register Expiration (in minutes. default 1 hour, max 45 days) -->
 <!-- # Number: 1-64800 -->
 <!-- # Mandatory -->
-<P1712>60</P1712>
+<P1712>{$register_expires_5}</P1712>
 
 <!-- # Subscribe Expiration. Default is 60. Max about 45 days -->
 <!-- # Number: 1 - 64800 -->
@@ -4315,7 +4316,7 @@
 <!-- # Register Expiration (in minutes). Default is 60. Max is 45 days -->
 <!-- # Number: 1 - 64800 -->
 <!-- # Mandatory -->
-<P1812>60</P1812>
+<P1812>{$register_expires_6}</P1812>
 
 <!-- # Subscribe Expiration. Default is 60. Max about 45 days -->
 <!-- # Number: 1 - 64800 -->
@@ -5270,7 +5271,7 @@
 {if isset($grandstream_pc_port_vlan) }
 <P229>{$grandstream_pc_port_vlan}</P229>
 {else}
-<P229>1</P229>
+<P229>0</P229>
 {/if}
 
 <!-- # PC Port Priority Value. Default is 0  -->
@@ -7206,12 +7207,14 @@
 <!-- # Speaker Ring Volume -->
 <!-- # Number: 0-7. Default is 5. -->
 <!-- # Mandatory -->
-<P8352>5</P8352>
+<!-- ##### We should NOT force the user's volume!!! ### -->
+<!-- <P8352>5</P8352> -->
 
 <!-- # Notification Tone Volume -->
 <!-- # Number: 0-7. Default is 5. -->
 <!-- # Mandatory -->
-<P8399>5</P8399>
+<!-- ##### We should NOT force the user's volume!!! ### -->
+<!-- <P8399>5</P8399> -->
 
 <!-- # Lock Volumne. 0 - No, 1 - Yes. Default is 0 -->
 <!-- # Number: 0, 1 -->