RFC 2543 SIP: Session Initiation Protocol
RFC 2848 The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call Services
RFC 2976 The SIP INFO Method
RFC 3050 Common Gateway Interface for SIP
RFC 3087 Control of Service Context using SIP Request-URI.
RFC 3261 SIP: Session Initiation Protocol
RFC 3262 Reliability of Provisional Responses in the SIP
RFC 3263 Session Initiation Protocol (SIP): Locating SIP Servers
RFC 3265 Session Initiation Protocol (SIP)-Specific Event Notification
RFC 3311 The Session Initiation Protocol (SIP) UPDATE Method
RFC 3312 Integration of Resource Management and SIP
RFC 3313 Private SIP Extensions for Media Authorization
RFC 3319 DHCPv6 Options for SIP Servers
RFC 3323 A Privacy Mechanism for the Session Initiation Protocol (SIP)
RFC 3325 Private Extensions to SIP for Asserted Identity within Trusted Networks
RFC 3326 The Reason Header Field for the Session Initiation Protocol (SIP)
RFC 3327 SIP Extension Header Field for Registering Non-Adjacent Contacts
RFC 3329 Security Mechanism Agreement for SIP
RFC 3351 User Requirements for the SIP in Support of Deaf, Hard of Hearing and Speech-impaired Individuals
RFC 3361 DHCP-for-IPv4 Option for SIP Servers
RFC 3372 SIP for Telephones (SIP-T): Context and Architectures
RFC 3398 ISUP to SIP Mapping
RFC 3420 Internet Media Type message/sipfrag
RFC 3427 Change Process for the SIP
RFC 3428 Session Initiation Protocol (SIP) Extension for Instant Messaging
RFC 3455 Private Header (P-Header) Extensions to the SIP for the 3GPP
RFC 3485 The SIP and SDP Static Dictionary for Signaling Compression
RFC 3486 Compressing the Session Initiation Protocol (SIP)
RFC 3487 Requirements for Resource Priority Mechanisms for the SIP.
RFC 3515 The Session Initiation Protocol (SIP) Refer Method
RFC 3578 Mapping of Integrated Services Digital Network (ISDN) User Part (ISUP) Overlap Signalling to the SIP
RFC 3581 An Extension to the SIP for Symmetric Response Routing
RFC 3603 Private SIP Proxy-to-Proxy Extensions for Supporting the PacketCable Distributed Call Signaling Architecture.
RFC 3608 SIP Extension Header Field for Service Route Discovery During Registration
RFC 3665 Session Initiation Protocol (SIP) Basic Call Flow Examples
RFC 3666 SIP Public Switched Telephone Network (PSTN) Call Flows.
RFC 3680 SIP Event Package for Registrations
RFC 3702 Authentication, Authorization, and Accounting Requirements for the SIP
RFC 3725 Best Current Practices for Third Party Call Control (3pcc) n the Session Initiation Protocol (SIP)
RFC 3764 Enumservice registration for Session Initiation Protocol (SIP)
RFC 3824 Using E.164 numbers with the Session Initiation Protocol (SIP).
RFC 3840 Indicating User Agent Capabilities in SIP
RFC 3841 Caller Preferences for SIP
RFC 3842 A Message Summary and Message Waiting Indication Event Package for SIP
RFC 3853 S/MIME Advanced Encryption Standard (AES) Requirement for the SIP
RFC 3856 A Presence Event Package for the Session Initiation Protocol (SIP)
RFC 3857 A Watcher Information Event Template-Package for the SIP
RFC 3891 The Session Initiation Protocol (SIP) "Replaces" Header
RFC 3892 The Session Initiation Protocol (SIP) Referred-By Mechanism
RFC 3893 Session Initiation Protocol (SIP) Authenticated Identity Body (AIB) Format
RFC 3903 Session Initiation Protocol (SIP) Extension for Event State Publication
RFC 3911 The Session Initiation Protocol (SIP) "Join" Header
RFC 3959 The Early Session Disposition Type for SIP
RFC 3960 Early Media and Ringing Tone Generation in SIP
RFC 3968 The Internet Assigned Number Authority (IANA) Header Field Parameter Registry for the SIP
RFC 3969 The Internet Assigned Number Authority (IANA) URI Parameter Registry for the SIP
RFC 3976 Interworking SIP and Intelligent Network (IN) Applications
RFC 4028 Session Timers in the Session Initiation Protocol (SIP)
RFC 4032 Update to the Session Initiation Protocol (SIP) Preconditions Framework
RFC 4083 Input 3GPP Release 5 Requirements on the SIP
RFC 4092 Usage of the SDP Alternative Network Address Types (ANAT) Semantics in the SIP
RFC 4117 Transcoding Services Invocation in the SIP Using Third Party Call Control (3pcc)
RFC 4123 Session Initiation Protocol (SIP)-H.323 Interworking Requirements
RFC 4168 The Stream Control Transmission Protocol (SCTP) as a Transport for the SIP
RFC 4189 Requirements for End-to-Middle Security for the SIP
RFC 4235 An INVITE-Initiated Dialog Event Package for the SIP
RFC 4240 Basic Network Media Services with SIP
RFC 4244 An Extension to the SIP for Request History Information
RFC 4245 High-Level Requirements for Tightly Coupled SIP Conferencing
RFC 4320 Actions Addressing Identified Issues with the SIP's Non-INVITE Transaction
RFC 4321 Problems Identified Associated with the SIP's Non-INVITE Transaction
RFC 4353 A Framework for Conferencing with the SIP.
RFC 4354 A SIP Event Package and Data Format for Various Settings in Support for the Push-to-Talk over Cellular (PoC) Service
RFC 4411 Extending the SIP Reason Header for Preemption Events
RFC 4412 Communications Resource Priority for the SIP
RFC 4453 Requirements for Consent-Based Communications in the SIP
RFC 4457 The SIP P-User-Database Private-Header (P-Header)
RFC 4458 SIP URIs for Applications such as Voicemail and Interactive Voice Response (IVR)
RFC 4474 Enhancements for Authenticated Identity Management in the SIP
RFC 4475 Session Initiation Protocol (SIP) Torture Test Messages.
RFC 4483 A Mechanism for Content Indirection in SIP
RFC 4484 Trait-Based Authorization Requirements for the SIP
RFC 4485 Guidelines for Authors of Extensions to the SIP
RFC 4488 Suppression of SIP REFER Method Implicit Subscription
RFC 4497 Interworking between the SIP and QSIG
RFC 4504 SIP Telephony Device Requirements and Configuration
RFC 4508 Conveying Feature Tags with the SIP REFER Method
RFC 4538 Request Authorization through Dialog Identification in the SIP
RFC 4575 A SIP Event Package for Conference State
RFC 4579 SIP Call Control - Conferencing for User Agents
RFC 4596 Guidelines for Usage of the SIP Caller Preferences Extension
RFC 4662 A SIP Event Notification Extension for Resource Lists
RFC 4730 A SIP Event Package for Key Press Stimulus (KPML).
RFC 4740 Diameter Session Initiation Protocol (SIP) Application.
和SDP有关的RFC：
RFC 2327 SDP: Session Description Protocol
RFC 3108 Conventions for the use of the SDP for ATM Bearer Connections.
RFC 3264 An Offer/Answer Model with the Session Description Protocol (SDP)
RFC 3266 Support for IPv6 in Session Description Protocol (SDP)
RFC 3388 Grouping Media Lines in SDP
RFC 3407 Session Description Protocol (SDP) Simple Capability Declaration
RFC 3556 Session Description Protocol (SDP) Bandwidth Modifiers for RTCP Bandwidth
RFC 3605 Real Time Control Protocol (RTCP) attribute in SDP
RFC 3890 A Transport Independent Bandwidth Modifier for the SDP
RFC 4091 The Alternative Network Address Types (ANAT) Semantics for the SDP Grouping Framework
RFC 4145 TCP-Based Media Transport in the Session Description Protocol (SDP)
RFC 4317 Session Description Protocol (SDP) Offer/Answer Examples
RFC 4566 SDP: Session Description Protocol.
RFC 4567 Key Management Extensions for SDP and Real Time Streaming Protocol (RTSP)
RFC 4568 Session Description Protocol (SDP) Security Descriptions for Media Streams
RFC 4570 Session Description Protocol (SDP) Source Filters
RFC 4572 Connection-Oriented Media Transport over the TLS Protocol in the SDP
RFC 4574 The Session Description Protocol (SDP) Label Attribute
RFC 4583 SDP Format for Binary Floor Control Protocol (BFCP) Streams.
RFC 4796 The Session Description Protocol (SDP) Content Attribute
和Presence, IM有关的RFC:
RFC 2778 A Model for Presence and Instant Messaging
RFC 3858 An Extensible Markup Language (XML) Based Format for Watcher Information
RFC 3859 Common Profile for Presence (CPP)
RFC 3860 Common Profile for Instant Messaging (CPIM)
RFC 3863 Presence Information Data Format (PIDF)
RFC 4119 A Presence-based GEOPRIV Location Object Format
RFC 4479 A Data Model for Presence
RFC 4480 RPID: Rich Presence Extensions to the PIDF
RFC 4660 Functional Description of Event Notification Filtering
RFC 4661 An XML-Based Format for Event Notification Filtering
RFC 4745 Common Policy: A Document Format for Expressing Privacy Preferences
XPIDF Draft: A Data Format for Presence Using XML (XPIDF)
XCAP Draft: The XML Configuration Access Protocol (XCAP)
Resource Lists Draft: The XML Formats for Representing Resource Lists
Presence Authorization Draft: Presence Authorization Rules
Partial Publication Draft: Publication of Partial Presence Information
Partial Presence Format Draft: PIDF Extension for Partial Presence
Partial Notification Draft: SIP extension for Partial Notification of Presence Information
OMA-defined PIDF extensions: OMA-defined PIDF extensions
SIMPLE: SIP for Instant Messaging and Presence Leveraging Extensions (simple)
Sipping-config-framework: A Framework for SIP User Agent Profile Delivery
其它:
RFC 2246 The TLS Protocol
RFC 2616 Hypertext Transfer Protocol -- HTTP/1.1
RFC 2617 HTTP Authentication: Basic and Digest Access Authentication
RFC 2782 A DNS RR for specifying the location of services (DNS SRV)
RFC 2806 URLs for Telephone Calls
RFC 3310 HTTP Digest Authentication Using Authentication and Key Agreement (AKA)
RFC 3489 STUN - Simple Traversal of UDP Through Network Address Translators (NATs)
RTP相关：
rfc3550, rfc3551, rfc4585, and some related technical presentations, such as rfc2119, rfc2354, rfc2733, rfc3448, rfc3556, rfc4340, rfc4566, rfc5109