diff --git a/resources/templates/provision/fanvil/x6/{$mac}.cfg b/resources/templates/provision/fanvil/x6/{$mac}.cfg
index 577cc12bca..e207383107 100644
--- a/resources/templates/provision/fanvil/x6/{$mac}.cfg
+++ b/resources/templates/provision/fanvil/x6/{$mac}.cfg
@@ -184,7 +184,7 @@
             <SendANOffCode>*67</SendANOffCode>
             <CWOnCode></CWOnCode>
             <CWOffCode></CWOffCode>
-            <VoiceCodecMap>PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
+            <VoiceCodecMap>opus,PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
             <VideoCodecMap></VideoCodecMap>
             <BLFListUri></BLFListUri>
             <BLFServer></BLFServer>
@@ -326,7 +326,7 @@
             <SendANOffCode>*67</SendANOffCode>
             <CWOnCode></CWOnCode>
             <CWOffCode></CWOffCode>
-            <VoiceCodecMap>PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
+            <VoiceCodecMap>opus,PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
             <VideoCodecMap></VideoCodecMap>
             <BLFListUri></BLFListUri>
             <BLFServer></BLFServer>
@@ -470,7 +470,7 @@
             <SendANOffCode></SendANOffCode>
             <CWOnCode></CWOnCode>
             <CWOffCode></CWOffCode>
-            <VoiceCodecMap>PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
+            <VoiceCodecMap>opus,PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
             <VideoCodecMap></VideoCodecMap>
             <BLFListUri></BLFListUri>
             <BLFServer></BLFServer>
@@ -611,7 +611,7 @@
             <SendANOffCode>*67</SendANOffCode>
             <CWOnCode></CWOnCode>
             <CWOffCode></CWOffCode>
-            <VoiceCodecMap>PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
+            <VoiceCodecMap>opus,PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
             <VideoCodecMap></VideoCodecMap>
             <BLFListUri></BLFListUri>
             <BLFServer></BLFServer>
@@ -753,7 +753,7 @@
             <SendANOffCode>*67</SendANOffCode>
             <CWOnCode></CWOnCode>
             <CWOffCode></CWOffCode>
-            <VoiceCodecMap>PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
+            <VoiceCodecMap>opus,PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
             <VideoCodecMap></VideoCodecMap>
             <BLFListUri></BLFListUri>
             <BLFServer></BLFServer>
@@ -895,7 +895,7 @@
             <SendANOffCode>*67</SendANOffCode>
             <CWOnCode></CWOnCode>
             <CWOffCode></CWOffCode>
-            <VoiceCodecMap>PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
+            <VoiceCodecMap>opus,PCMU,PCMA,G726-32,G729,G723,iLBC,AMR,G722,AMR-WB</VoiceCodecMap>
             <VideoCodecMap></VideoCodecMap>
             <BLFListUri></BLFListUri>
             <BLFServer></BLFServer>