Best Current Practices for a Session Initiation Protocol (SIP) Transparent Back-To-Back User-Agent (B2BUA)
Unrecognized · 2007
A SIP Back-To-Back User Agent (B2BUA) refers to the concatenation of a SIP User Agent Client (UAC) and a SIP User Agent Server (UAS). A transparent B2BUA is a particular type of B2BUA that forwards SIP messages in a SIP proxy-like way, and that also benefits from some features of a User Agent (UA) element. This document recommends best current practices for the implementation of such a transparent B2BUA. Developing transparent B2BUAs that meet this set of requirements will greatly increase the likelihood that SIP applications will function properly.