Hi Benny, I have tested pjsua sample using outbound proxy. With some other SIP Clients like X-Lite it works fine, but with PJSIP, the first REGISTER is routed over the outbound proxy but the second one (with authentication data) is sended directly to the SIP router. In attachment you can see the SIP flow and the configuration file. Best regards, Helmut -------------- next part -------------- A non-text attachment was scrubbed... Name: SIP Msg and config.zip Type: application/x-zip-compressed Size: 1167 bytes Desc: not available Url : http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20071016/4f7d312d/attachment.bin