The IETF SIP Working Group homepage is the official reference point
for the SIP Working Group, and includes our charter. See:
http://www.ietf.org/html.charters/sip-charter.html
Brought to you as a personal effort (that's no corporate sponsorship implied, ok?) of Dean Willis, who can be reached at dean.willis@softarmor.com and several other unlikely places. This is a personal server. Please don't thrash it. Have a nice day!