{"draft":"draft-allen-sipping-poc-p-answer-state-header-05","doc_id":"RFC4964","title":"The P-Answer-State Header Extension to the Session Initiation Protocol for the Open Mobile Alliance Push to Talk over Cellular","authors":["A. Allen, Ed.","J. Holm","T. Hallin"],"format":["ASCII","HTML"],"page_count":"32","pub_status":"INFORMATIONAL","status":"INFORMATIONAL","source":"IETF - NON WORKING GROUP","abstract":"This document describes a private Session Initiation Protocol (SIP)\r\nheader (P-header) used by the Open Mobile Alliance (OMA) for Push\r\nto talk over Cellular (PoC) along with its applicability, which is\r\nlimited to the OMA PoC application.  The P-Answer-State header is\r\nused for indicating the answering mode of the handset, which is\r\nparticular to the PoC application.  This memo provides information for the Internet community.","pub_date":"September 2007","keywords":["p-header","oma","open mobile alliance","poc"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":["RFC8996"],"see_also":[],"doi":"10.17487\/RFC4964","errata_url":null}