also with the same settings of pjsua --id sip:xxx at sip2sip.info --registrar sip:sip2sip.info --realm sip2sip.info --username xxx --password xxx --outbound sip:proxy.sipthor.net --nameserver proxy.sipthor.net --log-level 3 --no-tcp I tried on different network but it dosent work in some. why is it so ? Regards, Mohsin Z Barbhaiwala, Manager - Design. Spectrum Solutions & Technologies Pvt. Ltd. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140314/0fa5fccb/attachment-0001.html>