Requirements from Session Initiation Protocol (SIP) Session Border Control (SBC) Deployments
RFC 5853

Approval announcement
Draft of message to be sent after approval:

From: The IESG <iesg-secretary@ietf.org>
To: IETF-Announce <ietf-announce@ietf.org>
Cc: Internet Architecture Board <iab@iab.org>,
    RFC Editor <rfc-editor@rfc-editor.org>, 
    sipping mailing list <sipping@ietf.org>, 
    sipping chair <sipping-chairs@tools.ietf.org>
Subject: Document Action: 'Requirements from Session Initiation Protocol (SIP) Session Border Control (SBC) Deployments' to Informational RFC

The IESG has approved the following document:

- 'Requirements from Session Initiation Protocol (SIP) Session Border 
   Control (SBC) Deployments '
   <draft-ietf-sipping-sbc-funcs-09.txt> as an Informational RFC


This document is the product of the Session Initiation Proposal Investigation Working Group. 

The IESG contact persons are Robert Sparks and Cullen Jennings.

A URL of this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-sipping-sbc-funcs-09.txt

Technical Summary
This documents describes functions implemented in Session
Initiation Protocol (SIP) intermediaries known as Session
Border Controllers (SBCs). The goal of this document is to
describe the commonly provided functions of SBCs. A special 
focus is given to those practices that are viewed to be in
conflict with SIP architectural principles. This document
also explores the underlying requirements of network operators
that have led to the use of these functions and practices in
order to identify protocol requirements and determine whether
those requirements are satisfied by existing specifications
or additional standards work is required.

Working Group Summary
The SIPPING WG supports the development and advancement of
this document.

Document Quality
This document defines no new protocol elements.
The document was thoroughly reviewed within the SIPPING WG.

Francois Audet, Spencer Dawkins and Michael Procter
provided detailed reviews during and post WGLC.