I-D Action: draft-ietf-straw-b2bua-taxonomy-01.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the Sip Traversal Required for Applications to Work Working Group of the IETF.

	Title           : A Taxonomy of Session Initiation Protocol (SIP) Back-to-Back User Agents
	Author(s)       : Hadriel Kaplan
	Filename        : draft-ietf-straw-b2bua-taxonomy-01.txt
	Pages           : 9
	Date            : 2013-02-25

Abstract:
   In many SIP deployments, SIP entities exist in the SIP signaling
   path between the originating UAC and final terminating UAS, which go
   beyond the definition of a Proxy, performing functions not defined
   in standards-track RFCs.  The only term for such devices provided in
   [RFC3261] is for a Back-to-Back User Agent (B2BUA), which is defined
   as the logical concatenation of a User Agent Server (UAS) and User
   Agent Client (UAC).

   There are numerous types of SIP Back-to-Back User Agents (B2BUAs),
   performing different roles in different ways.  For Example IP-PBXs,
   SBCs and Application Servers.  This document identifies several
   common B2BUA roles, in order to provide taxonomy other documents can
   use and reference.



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