Hello, (sorry for repeating myquestion, but my first email seems to get lost ...) I have problems with registering PJSUA test-application to receive phone calls (calling somebody works fine) I?m using a Router with NAT behind a cable modem. Localy, my computer has the IP-Adress 192.168.123.50 Account list: [0] <sip:192.168.123.50:5060>: does not register Online status: Online [1] <sip:192.168.123.50:5060;transport=TCP>: does not register Online status: Online *[2] sip:4991329050000 at sip.1und1.de: 100/In Progress (expires=0) Online status: Online Am I understanding right, that the very first lines [0] and [1] try to register pjsua on my own computer UDP and TCP transport, both on Port 5060, but this registration fails??? What could be the reason??? (As a second problem, my Provider can not register [3] because this is a local address. But with "--ip-addr 62.245.123.123" in the config file, I can tell PJSUA my Internet IP-Adress, and registering of [3] works fine. Now I can call somebody by phone. But furthermore I can?t get phone calls) Account list: [ 0] <sip:62.245.123.123:5060>: does not register Online status: Online [ 1] <sip:62.245.123.123:5060;transport=TCP>: does not register Online status: Online *[ 2] sip:4991329050000 at sip.1und1.de: 200/OK (expires=14390) Online status: Online So ? if I?m understanding right ? pjsua tries to setup transport on the Internet address, but is not reaching my computer ... I tried to add one or both of the two parameters below, but this didn?t help at all. --bound-addr 192.168.123.50 --stun-srv stun.1und1.de It seems, that not receiving calls depends on not registering [0], but who could help ??? p.s. on my firewall Ports 5060(TCP+UDP), 4000-4019(UDP), 5070:5079(UDP) and 30000-30019(UDP) are forwarded to my computer, and I can see Invite telegram?s which come to my computer (measured with ethereal); with netstat PJSUA seems listening on Port 5060 (TCP+UDP) and 4000-4009 (UDP), but no info: "receiving call", and no reaction on the Invite ... With Regards, Michael -- Neu: GMX De-Mail - Einfach wie E-Mail, sicher wie ein Brief! Jetzt De-Mail-Adresse reservieren: http://portal.gmx.net/de/go/demail