Hi, I'm totally new to pjsip so apologies if this is a dumb question. I wanted to run two clients on the same box so I modified simpleua.c from the samples directory to allow some configuration from environment variables. In one window I run SIP_PORT=5061 RTP_PORT=8002 ./simpleua And in another SIP_PORT=5062 RTP_PORT=8004 ./simpleua sip:localhost:5061 The call progresses as follows: INVITE --> <-- 180 OK <-- 200 OK ACK --> But the ACK is sent to port 5060, not to port 5061 Any ideas? Julian --------------------------------- Yahoo! Answers - Get better answers from someone who knows. Tryit now. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080220/7cc3f1a2/attachment.html