Hi, When I use pj_thread_sleep() at invite session callback on_tsx_state_changed to wait for some external resource, this action causes other sip threads block too.Is it possible? or I miss something? regards, Gang -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20081209/16c4f0d2/attachment.html>