When reading PJSIP Dev Guide, section 1.2.3 Polling the stack *PJSIP stack never creates threads. All execution throughout the stack runs on * *behalf of application?s created thread, either when an API is called or when * *application calls the polling function* * * Is this what you're talking about? And if yes, please show me the tool you used to make 200-300 calls, thanks -- Khoa Pham HCMC University of Science Faculty of Information Technology -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130116/66b99242/attachment-0001.html>