Hi I have sent this email before but received no reply so I am resending it hoping that it will catch someone's attention and reply with some help :) I am trying to rout my voip traffic through a non standard port number, say 12345, which is already open on my server. I tired the following syntax when making a voip call using pjsua_call_make_call() but the call is routed through the default 5060 port: "sip:1234567 <at> localphone.com:12345" Any ideas how I can achieve this, if it is possible in PJSip? Cheers Fadi