{"draft":"draft-ejzak-sipping-p-em-auth-04","doc_id":"RFC5009","title":"Private Header (P-Header) Extension to the Session Initiation Protocol (SIP) for Authorization of Early Media","authors":["R. Ejza"],"format":["ASCII","HTML"],"page_count":"15","pub_status":"INFORMATIONAL","status":"INFORMATIONAL","source":"IETF - NON WORKING GROUP","abstract":"This document describes a private Session Initiation Protocol (SIP)\r\nheader field (P-header) to be used by the European\r\nTelecommunications Standards Institute (ETSI) Telecommunications and\r\nInternet-converged Services and Protocols for Advanced Networks\r\n(TISPAN) for the purpose of authorizing early media flows in Third\r\nGeneration Partnership Project (3GPP) IP Multimedia Subsystems\r\n(IMS).  This header field is useful in any SIP network that is\r\ninterconnected with other SIP networks and needs to control the flow\r\nof media in the early dialog state.  This memo provides information for the Internet community.","pub_date":"September 2007","keywords":["IMS","NGN","ETSI TISPAN","Gating","Cut-through","Call progress","Charging","PSTN","Interworking","Gateway","Ringback","Trust domain"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC5009","errata_url":null}