<p>In order for Echo to collect call audio information it must be installed
 on a computer that has an additional network card connected to a 
mirrored port on a local managed network switch.</p>

<p>The
 primary network card would have its IP configuration setup so it is 
visible on the data LAN.  This allows playback of recordings by 
authorised users of the system, as well as remote control (such as 
Remote Desktop Connection) of the Echo server if required.</p>

<p>The secondary network card would have its IP configuration setup so it is 
visible on the SIP/telephone network.  This will allow it to have 
mirrored traffic sent to it for monitoring and recording by the Echo 
server.</p>