The Ietf RFCS and Drafts:
RFC 1889 "RTP: A Transport for Real-Time Applications" RFC 2327 "SDP Session Description Protocol" RFC 2617 HTTP Authentication: Basic and Digest Access Authentication (for SIP) RFC 2833 "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals" RFC 2976 "The SIP INFO Method" RFC 3261 "SIP: Session Initiation Protocol" RFC 3263 Session Initiation Protocol (SIP): Locating SIP ServersRFC 3264 "An Offer / Answer Model with Session Description Protocol" RFC 3265 Session Initiation Protocol (SIP) - Specific Event NotificationRFC 3489 "STUN - Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)" RFC 3515 "The Session Initiation Protocol (SIP) Refer Method" RFC 3555 MIME Type Registration of RTP Payload FormatsRFC 3558 RTP Payload Format for Enhanced Variable Rate Codecs (EVRC) RFC 3581 An Extension to the Session Initiation Protocol (SIP) for Symmetric Response RoutingRFC 3605 "Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SD P) "RFC3856 a Presence Event Package for the session initiation protocol (SIP) RFC3857 A Watcher Information Event Template-Package for The Session Initiation Protocol (SIP)
Interactive Connectivity Establishment (ICE): A Methodology for Network Address Translator (NAT) Traversal for Multimedia Session Establishment Protocolsdraft-ietf-sipping-mwi "Message Summary and Message Waiting Indication Event Package for the Session Initiation Protocol (SIP)" draft-ietf- Sipping-CC-Transfer "Session Initiation Protocol Call Control - Transfer"
