RFCs
RFC 2848 - The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call Services. June 2000. Proposed Standard.
RFC 2976 - The SIP INFO Method. October 2000. Proposed Standard.
RFC 3050 - Common Gateway Interface for SIP. January 2001. Informational.
RFC 3261 - SIP: Session Initiation Protocol. June 2002. Proposed Standard.
RFC 3262 - Reliability of Provisional Responses in the Session Initiation Protocol (SIP). June 2002. Proposed Standard.
RFC 3263 - Session Initiation Protocol (SIP): Locating SIP Servers. June 2002. Proposed Standard.
RFC 3264 - An Offer/Answer Model with the Session Description Protocol (SDP). June 2002. Proposed Standard.
RFC 3265 - Session Initiation Protocol (SIP)-Specific Event Notification. June 2002. Proposed Standard.
RFC 3311 - The Session Initiation Protocol (SIP) UPDATE Method. October 2002. Proposed Standard.
RFC 3312 - Integration of Resource Management and Session Initiation Protocol (SIP). October 2002. Proposed Standard.
RFC 3319 - Dynamic Host Configuration Protocol (DHCPv6) Options for Session Initiation Protocol (SIP) Servers. July 2003. Proposed Standard.
RFC 3351 - User Requirements for the Session Initiation Protocol (SIP) in Support of Deaf, Hard of Hearing and Speech-impaired Individuals. August 2002. Informational.
RFC 3361 - Dynamic Host Configuration Protocol (DHCP-for-IPv4) Option for Session Initiation Protocol (SIP) Servers. August 2002. Proposed Standard.
RFC 3372 - Session Initiation Protocol for Telephones (SIP-T): Context and Architectures. September 2002. Best Current Practice.
RFC 3420 - Internet Media Type message/sipfrag. November 2002. Proposed Standard.
RFC 3578 - Mapping of Integrated Services Digital Network (ISDN) User Part (ISUP) Overlap Signalling to the Session Initiation Protocol (SIP). August 2003. Proposed Standard.
RFC 3581 - An Extension to the Session Initiation Protocol (SIP) for Symmetric Response Routing. August 2003. Proposed Standard.
RFC 3603 - Private Session Initiation Protocol (SIP) Proxy-to-Proxy Extensions for Supporting the PacketCable Distributed Call Signaling Architecture. October 2003. Informational.
RFC 3608 - Session Initiation Protocol (SIP) Extension Header Field for Service Route Discovery During Registration. October 2003. Proposed Standard.
RFC 3665 - Session Initiation Protocol (SIP) Basic Call Flow Examples. December 2003. Best Current Practice.
RFC 3666 - Session Initiation Protocol (SIP) Public Switched Telephone Network (PSTN) Call Flows. December 2003. Best Current Practice.
RFC 3702 - Authentication, Authorization, and Accounting Requirements for the Session Initiation Protocol (SIP). February 2004. Informational.
Working Group Drafts
draft-ietf-sipping-aaa-req-00.txt - Authentication, Authorization and Accounting Requirements for the Session Initiation Protocol. September 10, 2002.
draft-ietf-sip-message-07.txt - Session Initiation Protocol Extension for Instant Messaging. September 14, 2002.
draft-ietf-sip-compression-01.txt - Compressing the Session Initiation Protocol. September 17, 2002.
draft-ietf-sipping-3gpp-r5-requirements - 3rd-Generation Partnership Project (3GPP) Release 5 requirements on the Session Initiation Protocol (SIP).
Non WG Drafts
Links
IETF Working Group Session Initiation Proposal Investigation (sipping)
Session Initiation Protocol INvestiGation (SIPPING) Working Group
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