Websites for better understanding of SIP protocol.

I researched on SIP trunking VOIP phones previous two years ago, I developed a draft VOIP Technical Review and Risk Analysis for my organization. The SIP is nowadays captivating innovative trend where most of the organizations utilizing Cloud SaaS is reducing risk. However, I gained the control knowledge from ISACA.org where you will get better understanding about the implementation of this technology. Stab here if you need deeper understanding of SIP: http://www.sipforum.org/content/view/19/72/ or techtarget.com where search for SIP gives VoIP technology a boost or you may get more insight from https://www.owasp.org.

@Shantha_mh - good post. A thumbs up from me, and someone else as well. SIP - Session Initiated Protocol, used for VOIP (voice over internet phone) is very important these days. Good reference links are important to understand what this stuff does.