Following a discussion with Jeff this past day or two , I ran across
this site that seems to contain all kinds of great papers concerning
SIP.
http://www.sipcenter.com/sip.nsf/html/Whitepapers
Starting with Henning Schulzrine in 1998 and leading right up to date,
there are a total of 103 whitepapers convering an array of resources.
Now where's that Evelyn Wood reading DVD?
N.
SIP Whitepapers 
Linear Mode
