<extension name="Bind_DTMF_action">
    <condition field="destination_number" expression="^DTMF_CALL_CONTROL$">
      <action application="bind_digit_action" data="dtmf_call_control,*1,exec:execute_extension,attented_xfer XML ${context},both,self"/>
     
      <action application="bind_digit_action" data="dtmf_call_control,~^\d,exec:execute_extension,send_dgts XML ${context},both,peer"/>
      <action application="digit_action_set_realm" data="dtmf_call_control"/>
    </condition>
  </extension>


<extension name="Send_DTMF">
<condition field="destination_number" expression="^send_dgts$">
<action application="send_dtmf" data="${last_matching_digits}"/>
</condition>
</extension>