echo - Test of response of the server
XML request, sent by the client to the server 
<protocol>
     <echo [sid="8"]>
           <data>test</data> 
     </echo>
</protocol> 
                   
Attribute
Meaning
data
The function sends contents of the section data to the server.
XML response of the server to the client
<protocol>
      <response action="echo" errorCode="0" [sid="8"]>
           <data>test</data>
      </response>
</protocol>
                    
Attribute
Meaning
data
The server returns the section data. If the section data sent and returned are not alike the server does not work well.