{"draft":"draft-ietf-sip-history-info-06","doc_id":"RFC4244","title":"An Extension to the Session Initiation Protocol (SIP) for Request History Information","authors":["M. Barnes, Ed."],"format":["ASCII","HTML"],"page_count":"44","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Session Initiation Protocol","abstract":"This document defines a standard mechanism for capturing the history\r\ninformation associated with a Session Initiation Protocol (SIP)\r\nrequest.  This capability enables many enhanced services by providing\r\nthe information as to how and why a call arrives at a specific\r\napplication or user.  This document defines a new optional SIP header,\r\nHistory-Info, for capturing the history information in requests.  [STANDARDS-TRACK]","pub_date":"October 2005","keywords":["history-info","retarget","enhanced services","voicemail","automatic call distribution"],"obsoletes":[],"obsoleted_by":["RFC7044"],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC4244","errata_url":"https:\/\/www.rfc-editor.org\/errata\/rfc4244"}