Hi, Am new to SIP and as well to pj sip. While going through documentation in python pjsip...it says "design is all async"... Can i get to know the background...is it because sync model creates dead lock when leg-leg tries to update each other state? Does async also create priority inversion problems? Pls guide me as am trying to create B2BUA example...using this stack. Should B2Bua also follow async model? regards ragha -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130512/407d01cf/attachment-0001.html>