B.3 SIP Resources

1. IETF SIP Working Group
2. Columbia University SIP site
3. SIPfoundry: Open source development project for SIP components
4. SIP Center: commercial developers' site; whitepapers & other information
5. SIP Forum: non-profit organization of SIP developers
6. SIPdev: useful information site for SIP developers
7. IETF RFC 2617 (1999), HTTP Authentication: Basic and Digest Access Authentication.
8. IETF RFC 3261 (2002), SIP: Session Initiation Protocol.
9. IETF RFC 3263 (2002), Session Initiation Protocol (SIP): Locating SIP Servers.
10. Jon Peterson, IETF RFC 3893 (2004), Session Initiation Protocol (SIP) Authenticated Identity Body (AIB) Format.