{"draft":"draft-ietf-sip-join-03","doc_id":"RFC3911","title":" The Session Initiation Protocol (SIP) \"Join\" Header ","authors":["R. Mahy","D. Petrie"],"format":["ASCII","HTML"],"page_count":"17","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Session Initiation Protocol","abstract":" This document defines a new header for use with SIP multi-party applications and call control.  The Join header is used to logically join an existing SIP dialog with a new SIP dialog.  This primitive can be used to enable a variety of features, for example: \"Barge-In\", answering-machine-style \"Message Screening\" and \"Call Center Monitoring\".  Note that definition of these example features is non-normative.  [STANDARDS-TRACK]","pub_date":"September 2004","keywords":["SIP","Session Initiation Protocol","Join header"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC3911","errata_url":null}