Hi, In the machine with kernel 2.6.16.16 I was able to compile pjsua 1.5. I had problems with the alsa lib/drivers...so I could not compile another one higher. In the one with kernel 2.6.39 I could compile the last one v1.10. So, in the first one I installed v1.5 and in the second one v1.10 and the problems disappeared ! Both applications work quite well. However, I had problems if I executed v1.5 - 1.10 in two machines with the elder kernel (2.6.16.16)...the communications suddenly stopped the same way I commented in previous posts. Thanks again. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111021/e4da3006/attachment.html>