The IESG has received a request from the Sip Traversal Required for Applications to Work WG (straw) to consider the following document: - 'A Taxonomy of Session Initiation Protocol (SIP) Back-to-Back User Agents' <draft-ietf-straw-b2bua-taxonomy-02.txt> as Informational RFC The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2013-07-01. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. 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. The file can be obtained via http://datatracker.ietf.org/doc/draft-ietf-straw-b2bua-taxonomy/ IESG discussion can be tracked via http://datatracker.ietf.org/doc/draft-ietf-straw-b2bua-taxonomy/ballot/ No IPR declarations have been submitted directly on this I-D.
