Hi Jose, thank you for getting back! On Mon, Aug 22, 2011 at 9:41 PM, Jose Suarez <jsuarez at padirac.com.ar> wrote: > PJSUA has only one thread to manipulate all events for all the calls. So the > performance is very poor when you increase the number of calls in your > system. I recomend that you use the PJLIB and PJMEDIA libraries for that > purpose. I really don't need a lot of performance as I need to handle four calls at a time at a maximum. It seems, though, that PJSUA is not suitable for multiple calls by design, as it uses a lot of global, per-process state in the pjsua_var variable. I will look into using PJLIB and PJMEDIA, but it seems that those libraries will require much more effort due to their low-level nature? Thanks anyway, Hans