freeswitch/libs/xmlrpc-c/tools/binmode-rpc-kit/examples/good-2.xml

<?xml version="1.0" encoding="UTF-8"?>
<methodCall>
  <methodName>add</methodName>
  <params>
    <param>
      <value><int>2</int></value>
    </param>
    <param>
      <value><int>2</int></value>
    </param>
  </params>
</methodCall>