https://www.cisco.com/c/en/us/support/docs/conferencing/meeting-server/214623-analysis-of-callbridge-and-xmpp-connecti.html
Analysis of Callbridge and XMPP Connection Signaling on CMS - Cisco
This document describes how Callbridge and Extensible Messaging and Presence Protocol (XMPP) discover and communicate with each other.
analysisxmppconnectionsignalingcms