Openfire (formerly Wildfire) is a real time collaboration (RTC) server dual-licensed under the Open Source GPL and commercially. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber). Openfire is incredibly easy to setup and administer, but offers rock-solid security and performance.
Openfire offers an RPM that can be easily installed on trixbox.
1. login to the trixbox command prompt
2. cd to /var/tmp
3. get the latest Openfire RPM from http://www.igniterealtime.org/downloads
4. put the rpm in /var/tmp
5. install the RPM with
rpm -i openfire-3.6.0a-1.i386.rpm