{"draft":"draft-ietf-sip-refer-feature-param-01","doc_id":"RFC4508","title":"Conveying Feature Tags with the Session Initiation Protocol (SIP) REFER Method","authors":["O. Levin","A. Johnston"],"format":["ASCII","HTML"],"page_count":"6","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Session Initiation Protocol","abstract":"The SIP \"Caller Preferences\" extension defined in RFC 3840 provides a\r\nmechanism that allows a SIP request to convey information relating to\r\nthe originator's capabilities and preferences for handling of that\r\nrequest.  The SIP REFER method defined in RFC 3515 provides a mechanism\r\nthat allows one party to induce another to initiate a SIP\r\nrequest.  This document extends the REFER method to use the mechanism\r\nof RFC 3840.  By doing so, the originator of a REFER may inform the\r\nrecipient as to the characteristics of the target that the induced\r\nrequest is expected to reach.  [STANDARDS-TRACK]","pub_date":"May 2006","keywords":["caller preferences"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":["RFC8217"],"see_also":[],"doi":"10.17487\/RFC4508","errata_url":null}