@techreport{barnes-sip-em-ps-req-sol-00, number = {draft-barnes-sip-em-ps-req-sol-00}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-barnes-sip-em-ps-req-sol/00/}, author = {Russ Barnes and Matt Lepinski}, title = {{Early Media in SIP: Problem Statement, Requirements, and Analysis of Solutions}}, pagetotal = 14, year = 2007, month = feb, day = 8, abstract = {The Session Initiation Protocol (SIP) enables and permits endpoints in an INVITE transaction to send media packets before an SDP offer/ answer exchange has completed; we refer to such media packets as early media. The use of early media is common in current SIP implementations, and causes several problems, which have been documented elsewhere. This document puts forward the goal of modifying SIP so that compliant implementations will complete an SDP exchange before sending media, and lays out high-level requirements for such a solution. The set of possible solutions is then laid out, and each possibility examined in light of these requirements.}, }