freeswitch/conf/autoload_configs/distributor.conf.xml

<configuration name="distributor.conf" description="Distributor Configuration">
  <lists>
    <!-- every 10 calls to test you will get foo1 once and foo2 9 times...yes NINE TIMES! -->
    <!-- this is not the same as 100 with 10 and 90 that would do foo1 10 times in a row then foo2 90 times in a row -->
    <list name="test" total-weight="10">
      <node name="foo1" weight="1"/>
      <node name="foo2" weight="9"/>
    </list>
  </lists>
</configuration>