Hello Jason, What you should do is on the Kamailio server do an ngrep, that information will make it possible for the people on the list to take a look and help you. By only telling your experiences it is hard to help you. Just give the command: ngrep -qt -W byline port 5060 and then do the test calls, so from android to xlite and vice versa. Save the info and paste it in the case. Good luck. Gertjan From: sr-users-bounces(a)lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Jason Sia Sent: zondag 28 juli 2013 10:52 To: sr-users(a)lists.sip-router.org Subject: [SR-Users] kamailio call problem Hi, I installed kamailio v 3.1.6 rpm. I used the default configuration. Kamailio started. I have two clients one is an android phone using native sip client, and the other one x-lite. I can call x-lite to phone but not the other way around. When I restarted kamailio, I can call phone to x-lite but not the other way around. The first one I did when I restart kamailio will be the only leg that will be working, then I have to restart again if I want to do the reverse. Has anyone encountered this problem? How do I fix it? I'm on a LAN, kamailio server and the two clients are on the same LAN. Thanks, Jason