SIP Sessions

Hi Robert.. how to getting started with SIP? any good tutorials for SIP? like what is SIP, whats the different between SIP in here with SIP in TCP/IP? what are advantages of SIP? in which layer is it in SS7 protocol layers? on application layer? why SIP? and so on, sorry, i'm still newbie, please help..thanks a lot.

Hello Biyon! 
 
There are many good books and websites available to help you with learning SIP. A great place to start is the resource center at Tekelec: 
http://www.tekelec.com/resource-center/ 
 
Be sure to check out the Webinars - there are several focusing on introducing SI 
P. You'll also find the SIP Pocket Guide quite useful. 
 
To start to answer your questions (you can get more detail at the link above): 
 
SIP (the Session Initiation Protocol) is the signaling protocol used to establish real-time sessions on the Internet. It provides two primary services: allowing two endpoints find each other (even when their addresses frequently change), and allowing those endpoints to negotiate how they are going to communicate.  
 
SIP runs on top of other transport protocols. Currently, there are standard defi 
nitions for using SIP on UDP, TCP, and SCTP (including protecting the SIP messages on those transports with TLS). 
 
Glad to see you joining in the SIP community. Good luck, and enjoy! 

Hello Robert! 
 
 
 
Thanks a lot for your help.. :-) I have downloaded some books from that website, I will read it soon and then come back with some questions :P 
 
 
 
Thanks a lot Robert, Good luck too!

I have been studying SIP since the beginning of the year and I have been following the ongoing in the IETF of defining a P2P version of SIP. My question is what do I need to start developing SIP applications,  
I'm only good at Java programming though