I'd been trying using the web api, but couldn't get this to work.
got it working using the TCP.Client - power off pasted below -
<?xml version="1.0" encoding="utf-16"?>
<!--VoxCommando 2.2.1.4-->
<command id="-1" name="Actions copied from LCB">
<action>
<cmdType>TCP.Client.Connect</cmdType>
<params>
<param>LoungeBravia</param>
<param>10.1.1.7</param>
<param>20060</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>TCP.Client.Write</cmdType>
<params>
<param>LoungeBravia</param>
<param>*SCPOWR0000000000000000\x0A</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>TCP.Client.Disconnect</cmdType>
<params>
<param>LoungeBravia</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
</command>