The Reason Header Field for the Session Initiation Protocol (SIP)

Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as " work in progress. " To view the list Internet-Draft Shadow Directories, see Abstract For creating services, it is often useful to know why a SIP request was issued. This document defines an optional informational header field, Reason, that provides this information.