{"draft":"draft-ietf-sip-scvrtdisco-04","doc_id":"RFC3608","title":" Session Initiation Protocol (SIP) Extension Header Field for Service Route Discovery During Registration ","authors":["D. Willis","B. Hoeneisen"],"format":["ASCII","HTML"],"page_count":"17","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Session Initiation Protocol","abstract":" This document defines a Session Initiation Protocol (SIP) extension header field used in conjunction with responses to REGISTER requests to provide a mechanism by which a registrar may inform a registering user agent (UA) of a service route that the UA may use to request outbound services from the registrar's domain. ","pub_date":"September 2003","keywords":["SIP","Session Initiation Protocol","user agent","domain","register"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":["RFC5630"],"see_also":[],"doi":"10.17487\/RFC3608","errata_url":null}