Hello, I am new to VOIP world. I want to learn about the message processing in kamailio server. Can some one point out some good online source. Thanks Secondly when I connect soft phone to kamailio server. I find some error messages generated by Kamailio Server (I found out these messages using WireShark). I want to know which part of kamailio.cfg generated those messages. Thanks. Any help for this newbie will be appreciated. Best Regards