The Unison project combines a telephone system, email and instant messaging in a single server and client. In one system, it replaces your PBX as well as legacy email servers such as Microsoft Exchange.
Unison Server is the next generation of messaging. It combines all major forms of communication on a single Linux server. The server integrates many different components: e-mail; instant messaging and presence; an IP-PBX; a calendar server and an LDAP directory with contacts. Administrators manage everything via Unison Control Panel.
What's inside Unison Server
PBX / telephone
Call center-class IP-PBX built in, with patented scaling technology
Directory / contacts
LDAP with global, departmental and personal address books
E-mail / e-mail security
High-performance e-mail server with antivirus and antispam built in
Integrated XMPP-based instant message and presence server
Advanced CalDAV-based calendaring with group scheduling
Managing Unison Server
Unison Control Panel
One admin panel controls the corporate directory, telephone, email and more
Components / protocols
View Unison's components, protocols and RFCs