(注：只供作参考，下载链接已删除)  Core SIP Documents RFC 2543 SIP: Session Initiation Protocol (obsolete) RFC 3261 SIP: Session Initiation Protocol SDP Related Documents RFC 2327 Session Description Protocol (SDP) RFC 3264 An Offer/Answer Model with the Session Description Protocol (SDP) RFC 3266 Support of IPv6 in SDP RFC 3388 Grouping Media Lines in SDP RFC 3407 Session Description Protocol (SDP) Simple Capability Declaration RFC 3556 SDP Bandwidth Modifiers for RTCP Bandwidth RFC 3605 Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP) RFC 3890 A Transport Independent Bandwidth Modifier RTP Related Documents RFC 3550 RTP: Transport Protocol for Real-Time Applications RFC 3551 RTP Profile for A/V Conferences with Minimal Control RFC 2198 RTP Payload for Redundant Audio Data RFC 2733 An RTP Payload Format for Generic Forward Error Correction RFC 2793 RTP Payload for Text Conversation RFC 2833 RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals RFC 2959 Real-Time Transport Protocol Management Information Base RFC 3389 RTP Payload for Comfort Noise RFC 3611 RTP Control Protocol Extended Reports (RTCP XR) RFC 3711 The Secure Real-time Transport Protocol (SRTP) HTTP Related Documents RFC 2616 Hypertext Transfer Protocol -- HTTP/1.1 RFC 2617 HTTP Authentication: Basic and Digest Access Authentication RFC 3310 HTTP Digest Authentication Using Authentication and Key Agreement (AKA) RFC 3310 HTTP Digest Authentication Using Authentication and Key Agreement (AKA) MIME Related Documents RFC 1847 Security Multiparts for MIME: Multipart/Signed and Multipart/Encrypted RFC 2045 MIME Part One: Format of Internet Message Bodies RFC 2046 MIME Part Two: Media Types RFC 2047 MIME Part Three: Message Header Extensions for Non-ASCII Text RFC 2048 MIME Part Four: Registration Procedures RFC 2633 S/MIME Version 3 Message Specification RFC 3204 MIME media types for ISUP and QSIG Objects RFC 3420 Internet Media Type message/sipfrag RFC 3555 MIME Type Registration of RTP Payload Formats SIP Extension and Options RFC 2976 The SIP INFO Method RFC 2848 Extensions for IP Access to Telephone Call Services RFC 3050 CGI for SIP RFC 3262 Reliability of Provisional Responses RFC 3263 Locating SIP Servers RFC 3265 SIP-Specific Event Notification RFC 3311 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 SIP RFC 3324 Short Term Requirements for Network Asserted Identity RFC 3325 Private Extensions to SIP for Asserted Identity within Trusted Networks RFC 3326 The Reason Header Field RFC 3327 Extension Header Field for Registering Non-Adjacent Contacts RFC 3329 Security Mechanism Agreement 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 3428 SIP Extension for Instant Messaging RFC 3455 Private Header Extensions for 3GPP RFC 3515 The Session Initiation Protocol (SIP) Refer Method RFC 3608 Extension Header Field for Service Route Discovery During Registration RFC 3680 SIP Event Package for Registrations RFC 3840 Indicating User Agent Capabilities in SIP RFC 3841 Caller Preferences for SIP RFC 3842 Message Summary and Message Waiting Indication Event Package RFC 3856 Presence Event Package RFC 3857 A Watcher Information Event Template-Package RFC 3903 Event State Publication RFC 3959 Early Session Disposition Type RFC 3960 Early Media and Ringing Tone Generation SIP Informational RFCs and BCP Documents RFC 3087 Control of Service Context using SIP Request-URI RFC 3351 User Requirements for SIP in Support of Speech/Hearing Impaired RFC 3603 Private SIP Proxy-to-Proxy Extensions for PacketCable Distributed Call Signaling RFC 3702 Authentication, Authorization, and Accounting Requirements for SIP RFC 3824 Using E.164 numbers with SIP RFC 3911 The SIP "Join" Header RFC 3968 IANA Registry for SIP Header Field RFC 3969 IANA Registry for SIP URI RFC 3976 Interworking SIP and IN Applications SIP Related Documents RFC 3219 Telephony Routing over IP (TRIP) (tutorial) RFC 3320 Signalling Compression RFC 3321 Signalling Compression - Extended Operations (informational) RFC 3322 Signalling Compression - Requirements and Assumptions (informational) RFC 3486 Compressing the Session Initiation Protocol (SIP) RFC 3485 SIP and SDP Static Dictionary for Signaling Compression RFC 3725 Best Current Practices for 3PCC in SIP RFC 3764 enumservice registration for SIP Addresses-of-Record Directory Services Documents H.350 Directory Services Architecture for Multimedia Conferencing H.350.4 Directory Services Architecture for SIP   相关链接：http://www.packetizer.com/voip/sip/standards.html

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