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[2]Rosenberg, Schulzrinne, Camarillo, Johnston, Peterson, Sparks, Handley, Schooler, “SIP: Session Initiation Protocol,” INTERNET-DRAFT, October 26, 2001 Expires: April 2002.
[3]Alan Johnston, WorldCom, Steve Donovan, Robert Sparks, Chris Cunningham, Dean Willis, Jonathan Rosenberg, dynamicsoft, Kevin Summers, Sonus, Henning Schulzrinne, “SIP Call Flow Examples,” INTERNET-DRAFT, February 2002 Expires: August 2002.
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