diff --git a/resources/templates/provision/cisco/spa501g/{$mac}.xml b/resources/templates/provision/cisco/spa501g/{$mac}.xml
index db81196b7e..3dac6842de 100644
--- a/resources/templates/provision/cisco/spa501g/{$mac}.xml
+++ b/resources/templates/provision/cisco/spa501g/{$mac}.xml
@@ -148,12 +148,12 @@
 <EncapRTP_Codec_Name group="SIP/SDP_Payload_Types">encaprtp</EncapRTP_Codec_Name>
 
 <!-- SIP/NAT_Support_Parameters -->
-<Handle_VIA_received group="SIP/NAT_Support_Parameters">{$cisco_spa_rport}</Handle_VIA_received>
-<Handle_VIA_rport group="SIP/NAT_Support_Parameters">{$cisco_handle_via_rport}</Handle_VIA_rport>
+<Handle_VIA_received group="SIP/NAT_Support_Parameters">No</Handle_VIA_received>
+<Handle_VIA_rport group="SIP/NAT_Support_Parameters">{$spa_handle_via_rport}</Handle_VIA_rport>
 <Insert_VIA_received group="SIP/NAT_Support_Parameters">No</Insert_VIA_received>
-<Insert_VIA_rport group="SIP/NAT_Support_Parameters">{$cisco_insert_via_rport}</Insert_VIA_rport>
-<Substitute_VIA_Addr group="SIP/NAT_Support_Parameters">{$cisco_spa_rport}</Substitute_VIA_Addr>
-<Send_Resp_To_Src_Port group="SIP/NAT_Support_Parameters">{$cisco_spa_rport}</Send_Resp_To_Src_Port>
+<Insert_VIA_rport group="SIP/NAT_Support_Parameters">{spa_insert_via_rport}</Insert_VIA_rport>
+<Substitute_VIA_Addr group="SIP/NAT_Support_Parameters">No</Substitute_VIA_Addr>
+<Send_Resp_To_Src_Port group="SIP/NAT_Support_Parameters">No</Send_Resp_To_Src_Port>
 <STUN_Enable group="SIP/NAT_Support_Parameters">No</STUN_Enable>
 <STUN_Test_Enable group="SIP/NAT_Support_Parameters">No</STUN_Test_Enable>
 <STUN_Server group="SIP/NAT_Support_Parameters" />