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

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        RFC 5853

        Title:      Requirements from Session Initiation Protocol 
                    (SIP) Session Border Control (SBC) Deployments 
        Author:     J. Hautakorpi, Ed.,
                    G. Camarillo, R. Penfield,
                    A. Hawrylyshen, M. Bhatia
        Status:     Informational
        Stream:     IETF
        Date:       April 2010
        Mailbox:    Jani.Hautakorpi@ericsson.com, 
                    Gonzalo.Camarillo@ericsson.com, 
                    bpenfield@acmepacket.com,  alan.ietf@polyphase.ca, 
                    mbhatia@3clogic.com
        Pages:      26
        Characters: 60476
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-sipping-sbc-funcs-09.txt

        URL:        http://www.rfc-editor.org/rfc/rfc5853.txt

This document 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 if additional standards work is required.  This document is not 
an Internet Standards Track specification; it is published for 
informational purposes.

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

INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
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