| 9143 | Negotiating Media Multiplexing Using the Session Description Protocol (SDP)C. Holmberg, H. Alvestrand, C. Jennings | Proposed Standard | February 2022 |
| 8866 | SDP: Session Description ProtocolA. Begen, P. Kyzivat, C. Perkins, M. Handley | Proposed Standard | January 2021 |
| 8843 | Negotiating Media Multiplexing Using the Session Description Protocol (SDP)C. Holmberg, H. Alvestrand, C. Jennings · obsoleted by RFC 9143 | Proposed Standard | January 2021 |
| 7989 | End-to-End Session Identification in IP-Based Multimedia Communication NetworksP. Jones, G. Salgueiro, C. Pearce, P. Giralt | Proposed Standard | October 2016 |
| 6157 | IPv6 Transition in the Session Initiation Protocol (SIP)G. Camarillo, K. El Malki, V. Gurbani | Proposed Standard | April 2011 |
| 6026 | Correct Transaction Handling for 2xx Responses to Session Initiation Protocol (SIP) INVITE RequestsR. Sparks, T. Zourzouvillys | Proposed Standard | September 2010 |
| 5630 | The Use of the SIPS URI Scheme in the Session Initiation Protocol (SIP)F. Audet | Proposed Standard | October 2009 |
| 5589 | Session Initiation Protocol (SIP) Call Control - TransferR. Sparks, A. Johnston, Ed., D. Petrie | Best Current Practice | June 2009 |
| 5411 | A Hitchhiker's Guide to the Session Initiation Protocol (SIP)J. Rosenberg | Informational | February 2009 |
| 5393 | Addressing an Amplification Vulnerability in Session Initiation Protocol (SIP) Forking ProxiesR. Sparks, Ed., S. Lawrence, A. Hawrylyshen, B. Campen | Proposed Standard | December 2008 |
| 4916 | Connected Identity in the Session Initiation Protocol (SIP)J. Elwell | Proposed Standard | June 2007 |
| 4485 | Guidelines for Authors of Extensions to the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne | Informational | May 2006 |
| 4475 | Session Initiation Protocol (SIP) Torture Test MessagesR. Sparks, Ed., A. Hawrylyshen, A. Johnston, J. Rosenberg, H. Schulzrinne | Informational | May 2006 |
| 4463 | A Media Resource Control Protocol (MRCP) Developed by Cisco, Nuance, and SpeechworksS. Shanmugham, P. Monaco, B. Eberman | Informational | April 2006 |
| 4425 | RTP Payload Format for Video Codec 1 (VC-1)A. Klemets | Proposed Standard | February 2006 |
| 4168 | The Stream Control Transmission Protocol (SCTP) as a Transport for the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne, G. Camarillo | Proposed Standard | October 2005 |
| 3944 | H.350 Directory ServicesT. Johnson, S. Okubo, S. Campos | Informational | December 2004 |
| 3911 | The Session Initiation Protocol (SIP) "Join" HeaderR. Mahy, D. Petrie | Proposed Standard | October 2004 |
| 3891 | The Session Initiation Protocol (SIP) "Replaces" HeaderR. Mahy, B. Biggs, R. Dean | Proposed Standard | September 2004 |
| 3550 | RTP: A Transport Protocol for Real-Time ApplicationsH. Schulzrinne, S. Casner, R. Frederick, V. Jacobson | Internet Standard | July 2003 |
| 3525 | Gateway Control Protocol Version 1C. Groves, Ed., M. Pantaleo, Ed., T. Anderson, Ed., T. Taylor, Ed. · obsoleted by RFC 5125 | Historic | June 2003 |
| 3426 | General Architectural and Policy ConsiderationsS. Floyd | Informational | November 2002 |
| 3407 | Session Description Protocol (SDP) Simple Capability DeclarationF. Andreasen | Proposed Standard | October 2002 |
| 3362 | Real-time Facsimile (T.38) - image/t38 MIME Sub-type RegistrationG. Parsons | Proposed Standard | September 2002 |
| 3361 | Dynamic Host Configuration Protocol (DHCP-for-IPv4) Option for Session Initiation Protocol (SIP) ServersH. Schulzrinne | Proposed Standard | August 2002 |
| 3298 | Service in the Public Switched Telephone Network/Intelligent Network (PSTN/IN) Requesting InTernet Service (SPIRITS) Protocol RequirementsI. Faynberg, J. Gato, H. Lu, L. Slutsman | Informational | September 2002 |
| 3264 | An Offer/Answer Model with Session Description Protocol (SDP)J. Rosenberg, H. Schulzrinne | Proposed Standard | July 2002 |
| 3263 | Session Initiation Protocol (SIP): Locating SIP ServersJ. Rosenberg, H. Schulzrinne | Proposed Standard | July 2002 |
| 3262 | Reliability of Provisional Responses in Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne | Proposed Standard | July 2002 |
| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3259 | A Message Bus for Local CoordinationJ. Ott, C. Perkins, D. Kutscher | Informational | May 2002 |
| 3234 | Middleboxes: Taxonomy and IssuesB. Carpenter, S. Brim | Informational | February 2002 |
| 3219 | Telephony Routing over IP (TRIP)J. Rosenberg, H. Salama, M. Squire | Proposed Standard | January 2002 |
| 3204 | MIME media types for ISUP and QSIG ObjectsE. Zimmerer, J. Peterson, A. Vemuri, L. Ong, F. Audet, M. Watson, M. Zonoun | Proposed Standard | December 2001 |
| 3108 | Conventions for the use of the Session Description Protocol (SDP) for ATM Bearer ConnectionsR. Kumar, M. Mostafa | Proposed Standard | May 2001 |
| 3099 | Request for Comments Summary RFC Numbers 3000-3099S. Ginoza | Informational | November 2001 |
| 3087 | Control of Service Context using SIP Request-URIB. Campbell, R. Sparks | Informational | April 2001 |
| 3050 | Common Gateway Interface for SIPJ. Lennox, H. Schulzrinne, J. Rosenberg | Informational | January 2001 |
| 3027 | Protocol Complications with the IP Network Address TranslatorM. Holdrege, P. Srisuresh | Informational | January 2001 |
| 3015 | Megaco Protocol Version 1.0F. Cuervo, N. Greene, A. Rayhan, C. Huitema, B. Rosen, J. Segers · obsoleted by RFC 3525 | Proposed Standard | November 2000 |
| 3002 | Overview of 2000 IAB Wireless Internetworking WorkshopD. Mitzel | Informational | December 2000 |
| 2995 | Pre-Spirits Implementations of PSTN-initiated ServicesH. Lu, Ed., I. Faynberg, J. Voelker, M. Weissman, W. Zhang, S. Rhim, J. Hwang, S. Ago, S. Moeenuddin, S. Hadvani, S. Nyckelgard, J. Yoakum, L. Robart | Informational | November 2000 |
| 2976 | The SIP INFO MethodS. Donovan · obsoleted by RFC 6086 | Proposed Standard | October 2000 |
| 2924 | Accounting Attributes and Record FormatsN. Brownlee, A. Blount | Informational | September 2000 |
| 2916 | E.164 number and DNSP. Faltstrom · obsoleted by RFC 3761 | Proposed Standard | September 2000 |
| 2885 | Megaco Protocol version 0.8F. Cuervo, N. Greene, C. Huitema, A. Rayhan, B. Rosen, J. Segers · obsoleted by RFC 3015 | Historic | August 2000 |
| 2871 | A Framework for Telephony Routing over IPJ. Rosenberg, H. Schulzrinne | Informational | June 2000 |
| 2848 | The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call ServicesS. Petrack, L. Conroy | Proposed Standard | June 2000 |
| 2824 | Call Processing Language Framework and RequirementsJ. Lennox, H. Schulzrinne | Informational | May 2000 |
| 2806 | URLs for Telephone CallsA. Vaha-Sipila · obsoleted by RFC 3966 | Proposed Standard | April 2000 |
| 2705 | Media Gateway Control Protocol (MGCP) Version 1.0M. Arango, A. Dugan, I. Elliott, C. Huitema, S. Pickett · obsoleted by RFC 3435 | Informational | October 1999 |