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    SIP Relevant Standards
    RFC 3261 SIP: Session Initiation Protocol
    RFC 3219 Telephony Routing over IP (TRIP)
    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
    RFC 4077 A Negative Acknowledgement Mechanism for Signaling Compression
    RFC 4083 3GPP Release 5 Requirements on SIP
    RFC 4092 Using SDP Alternative NAT Semantics in SIP
    RFC 3219 Telephony Routing over IP (TRIP)
    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
    RFC 4077 A Negative Acknowledgement Mechanism for Signaling Compression
    RFC 4083 3GPP Release 5 Requirements on SIP
    RFC 4092 Using SDP Alternative NAT Semantics in SIP
    SIP Options recommended 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 3891 "Replaces" Header
    RFC 3903 Event State Publication
    RFC 3959 Early Session Disposition Type
    RFC 3960 Early Media and Ringing Tone Generation
    RFC 4028 Session Timers in the Session Initiation Protocol (SIP)
    RFC 4235 An INVITE-Initiated Dialog Event Package for SIP
    RFC 4244 Extension for Request History Information
    SIP Docs SIP Informational RFCs and BCP
    RFC 3087 Control of Service Context using SIP Request-URI
    RFC 3351 User Requirements for SIP in Support of Speech/Hearing Impaired
    RFC 3603 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
    RFC 4117 Transcoding Services Invocation using 3PCC
    RFC 4123 SIP-H.323 Interworking Requirements
    RFC 4168 SCTP as a transport for SIP
    RFC 4189 Requirements for End-to-Middle Security for SIP
    RFC 4245 High-Level Requirements for Tightly Coupled SIP Conferencing
    SDP Docs 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 SDP
    RFC 3890 A Transport Independent Bandwidth Modifier
    RFC 4091 An Alternative NAT Semantics for SDP
    RFC 4145 TCP-Based Media Transport in the SDP
    RTP Relevant Standards
    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 relevant 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 relevant 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
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