Hi, I tried to change the listening socket (TCP), but sending unregister and sending register again always failed because VIA header is not update (using old network interface). Does anyone know how to change this VIA header in REGISTER message? Thanks Yeffri -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20101208/923f93b7/attachment.html>