Hi again all, I am still building an IVR server and testing the max possible account of calls that can be handled by pjsip. I set PJSUA_MAX_CALLS to 100 The value inf config_site.h for PJMEDIA_SOUND_BUFFER_COUNT is set to 16. My application just take calls and play a sound file looped. I use the pjsua high level methods (pjsua_player_create ....) The machine is a Pentium IV 1.9 Ghz with enough memory. When I send 20 calls, the sound stays being correct. If I send 30 simultaneous calls, I get the same result than described on your site : http://trac.pjsip.org/repos/wiki/audio-problem-dropouts The sound I have is the same than the stutter.wav found there. http://trac.pjsip.org/repos/attachment/wiki/audio-problem-dropouts/stutter.wav Wich optimisations can be done ? My goal is about 100 simultaneous calls. Regards, Frederic (Sorry again for my very bad english) -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080903/478f7fbf/attachment.html -------------- next part -------------- A non-text attachment was scrubbed... Name: fclement.vcf Type: text/x-vcard Size: 389 bytes Desc: not available Url : http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080903/478f7fbf/attachment.vcf