How to develop a Simple Sip Stack - thoughts mind flow

1. http://code.google.com/p/openjsip/
2. http://www.oracle.com/technetwork/java/javase/tech/index-jsp-136424.html
3. http://www.cafesip.org/projects/sipunit/javadocs/org/cafesip/sipunit/SipStack.html
4. http://camel.apache.org/sip.html
1. http://camel.apache.org/
2. http://stackoverflow.com/questions/8845186/what-exactly-is-apache-camel
3. http://java.dzone.com/articles/open-source-integration-apache
4. http://manning.com/ibsen/
5. 
   

Why do we need NIO Framework.

1. http://gleamynode.net/articles/2232/
2. http://stackoverflow.com/questions/2671520/java-programs-using-nio-framework
3. http://www.khelekore.org/rnio/
4. http://www.jboss.org/netty/
5. http://nioframework.sourceforge.net/