FYI, I have post message yesterday, and I did a quick tried on following step to add enum. I tried to use java sip client to make outbound call using gafachi or qwest. So, I added    <extension name="matchpoint_caller">        <condition field="caller_id_number" expression="^16508101200$"/>        <condition field="destination_number" expression="^(.*)$">          <action application="set" data="effective_caller_id_number=16508101200"/>          <action application="set" data="effective_caller_id_name=Matchpoint Inc."/>          <action application="bridge" data="sofia/gateway/sip.gafachi.com/$1"/>       </condition>     </extension> First, created new file matchpoint_caller.xml, and put under conf/dialplan, (i also tried it at conf/dialplan/default) directory. For some reason, It never pickup this enum (404 error), when java sip sent the invite. Then remove the matchpoint_caller.xml and add the <extension name="matchpoint_caller"> to conf/dialplan/default.xml. The trick thing is that if put this element above <X-PRE-PROCESS cmd="include" data="default/*.xml"/> then 404 is gone. If I put it below <X-PRE-PROCESS cmd="include" data="default/*.xml"/> then i still got 404 error.