DefaultTransformationConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<TransformationConfig>		
 	<TransformationRules>

		<Client2Pbx>
			<Rule regex="(.* )(sip:)(/'ProxySocketIP'/)( SIP/)"
		    	  replacement="$1$2/'PbxIP'/$4"
		    	  isActive="true"/>
			<Rule regex="(Via: )(SIP/.*/UDP )(/'ClientIP'/)(:)(/'ClientPort'/)" 
			      replacement="$1$2/'ProxySocketIP'/$4/'ProxySocketPort'/"
		    	  isActive="true"/>
			<Rule regex="(From: )(.* )(.sip:)(.*)(@)(/'ProxySocketIP'/)(.)" 
			      replacement="$1$2$3$4$5/'PbxIP'/$7"
		    	  isActive="true"/>
			<Rule regex="(To: )(.*)(sip:)(.*)(@)(/'ProxySocketIP'/)(.)"
			      replacement="$1$2$3$4$5/'PbxIP'/$7"
		    	  isActive="true"/>
			<Rule regex="(Contact: )(.*)(sip:)(.*)(@)(/'ClientIP'/)(:)(/'ClientPort'/)(.)"
			      replacement="$1$2$3$4$5/'ProxySocketIP'/$7/'ProxySocketPort'/$9"
		    	  isActive="true"/>
			<Rule regex="(Call-ID: )(.*)(@)(/'ProxySocketIP'/)"
			      replacement="$1$2$3/'PbxIP'/"
		    	  isActive="true"/>
		    <Rule regex="(ACK )(sip:.*)(@)(/'ProxySocketIP'/)"
		          replacement="$1$2$3/'PbxIP'/"
		          isActive="true"/>
	    </Client2Pbx>
   	 
		<Pbx2Client>
			<Rule regex="(.* )(sip:)(.*)(@)(/'ProxySocketIP'/)(:)(/'ProxySocketPort'/)( SIP/)"
			      replacement="$1$2$3$4/'ClientIP'/$6/'ClientPort'/$8"
		    	  isActive="true"/>
			<Rule regex="(Via: )(SIP/.*/UDP )(/'ProxySocketIP'/)(:)(/'ProxySocketPort'/)(.*)(received=)(/'ProxySocketIP'/)"
			      replacement="$1$2/'ClientIP'/$4/'ClientPort'/$6$7/'ClientIP'/"
		    	  isActive="true"/>
			<Rule regex="(Via: )(SIP/.*/UDP )(/'PbxIP'/)(:)(/'PbxPort'/)"
			      replacement="$1$2/'ProxySocketIP'/$4/'ProxySocketPort'/"
		    	  isActive="true"/>
			<Rule regex="(From: )(.* )(.sip:)(.*)(@)(/'PbxIP'/)(.)" 
			      replacement="$1$2$3$4$5/'ProxySocketIP'/$7"
		    	  isActive="true"/>
			<Rule regex="(To: )(.*)(sip:)(.*)(@)(/'PbxIP'/)(.)" 
			      replacement="$1$2$3$4$5/'ProxySocketIP'/$7"
		    	  isActive="true"/>
			<Rule regex="(To: )(sip:)(.*)(@)(/'ProxySocketIP'/)(:)(/'ProxySocketPort'/)(.)" 
			      replacement="$1$2$3$4/'ClientIP'/$6/'ClientPort'/$8"
		    	  isActive="true"/>
			<Rule regex="(Call-ID: )(.*)(@)(/'PbxIP'/)"
			      replacement="$1$2$3/'ProxySocketIP'/"
		    	  isActive="true"/>
			<Rule regex="(Contact: )(.sip:)(.*)(@)(/'PbxIP'/)(.)"
			      replacement="$1$2$3$4/'ProxySocketIP'/$6"
		    	  isActive="true"/>
			<Rule regex="(Message-Account: )(sip:)(.*)(@)(/'PbxIP'/)"
			      replacement="$1$2$3$4/'ProxySocketIP'/"
		    	  isActive="true"/>
	    </Pbx2Client>

  	</TransformationRules>
  	
</TransformationConfig>