Hi all, While getting further in my development, we encountered a weird (and wrong) behaviour from the pjsip library during the registration. I want to register on my server for the domain dom.org let say. But I have to go through a border control function (a proxy). So, when I add my account, I set the reg_uri to "sip:dom.org" which is the domain on which I want to register. Then I add app_config.cfg.outbound_proxy_cnt = 1; app_config.cfg.outbound_proxy[0] = pj_str("sip:1.2.3.4"); to my configuration. When sniffing the traffic who comes to the registrar, I expected to see a "REGISTER sip:dom.org" but in fact it was a "REGISTER sip:1.2.3.4". This is something that should not happen. When you specify an outbound proxy, it just mean that the signaling should be sent to this address (looking strictly to the transport layer) in place of using DNS lookup on the domain to find directly the Registrar address. Regards, Olivier B. -- Olivier Beytrison Telecommunication Engineer Mobile: +41 (0)78 619 73 53 Mail: olivier at heliosnet.org GPG: 0x4FB83528 http://pgp.mit.edu/