hi, i am adding code for making udp transport pjsua_transport_config cfg1; pjsua_transport_config_default(&cfg1); cfg1.port= 5060; status = pjsua_transport_create(PJSIP_TRANSPORT_UDP,&cfg1,NULL); if(status!=PJ_SUCCESS){ app_perror(THIS_FILE,"transport error",status); return 1; } but after running this, it giving me error :<bind error> what is the reason for this error? any advice would be appreciated..... Regards New_bie -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20081206/af3557f2/attachment.html>