{"draft":"draft-ietf-sipping-early-media-02","doc_id":"RFC3960","title":" Early Media and Ringing Tone Generation in the Session Initiation Protocol (SIP) ","authors":["G. Camarillo","H. Schulzrinne"],"format":["ASCII","HTML"],"page_count":"13","pub_status":"INFORMATIONAL","status":"INFORMATIONAL","source":"Session Initiation Proposal Investigation","abstract":" This document describes how to manage early media in the Session Initiation Protocol (SIP) using two models: the gateway model and the application server model.  It also describes the inputs one needs to consider in defining local policies for ringing tone generation.  This memo provides information for the Internet community. ","pub_date":"November 2004","keywords":[" "],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC3960","errata_url":null}