Freeswitch限制外呼并发

<extension name="outbound">
  <condition field="destination_number" expression="^0(\d+)$">
    <action application="limit_execute" data="hash outbound carrier1 5 bridge sofia/gateway/carrier1/${destination_number}" />
    <action application="limit_execute" data="hash outbound carrier2 5 bridge sofia/gateway/carrier2/${destination_number}" />
  </condition>
</extension>

<extension name="limit_exceeded">
  <condition field="destination_number" expression="^limit_exceeded$">
    <action application="playback" data="/sounds/overthelimit.wav"/>
    <action application="hangup"/>
  </condition>
</extension>
 
<extension name="limit" continue="true">
  <condition>
    <!-- You can set ${max_calls} per user in directory.conf and remove the line below -->
    <action application="set" data="max_calls=1" inline="true"/>
    <action application="limit" data="db $${domain} ${sip_auth_username} ${max_calls}"/>
  </condition>
</extension>