Hello Pablo,
Someone tested echo on sems ?
How I need to configure sems.conf to test echo ?
You don't need to configure anything for the echo plug-in.
All you need to configure is Ser (ser.cfg) to redirect some number or
special URI to the echo module.
You can find an example with 'voicemail' at <ser>/examples/voicemail.cfg.
Then, you just have to replace 'voicemail' with 'echo', so that any call
gets redirected to echo.
-Raphael.