Hi! > I can not see that port 5060 is busy in any process under linux - another suggestion what can be wrong with 5060 port on linux machine? > AppServ1:/home/emssim/tools/pjproject2/pjsip-apps/bin # netstat -a | grep 5060 When I execute this command netstat -a|grep 5060 on a machine running an asterisk on port 5040 I also get no result. Try it with this command: netstat -apn|grep 5060 udp 0 0 0.0.0.0:5060 0.0.0.0:* 1236/asterisk Best Regards J?rg Schwarzenberg