tweak, and yes this works too ;)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7874 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/dialplan/default.xml

@@ -142,7 +142,7 @@
     <extension name="cf">
       <condition field="destination_number" expression="^cf$">
 	<action application="answer"/>
-	<action application="transfer" data="-both 3000"/>
+	<action application="transfer" data="-both 30${dialed_extension:2}"/>
       </condition>
     </extension>