Open-Xchange, a provider of open source collaboration software, has unveiled new enhancements that give users telephone and fax integrated with e-mail, contacts, calendar and task information.

By combining Open-Xchange hosted and on-premises editions with unified communications and virtual PBX offerings, businesses can replace their traditional phone lines, the company said.

Open-Xchange has entered into a partnership with 4PSA, a software supplier of unified communications, VoIP delivery offerings, business and operations automation, to launch 4PSA VoipNow Bundle for both Open-Xchange Server and Open-Xchange Hosting Edition.

The companies also plan to add instant messaging services and presence, the capability for users to see the current status of other phone extensions, in the next release of the Open-Xchange user interface.

In addition, the new release of Open-Xchange enhances the user interface with design and usability improvements, and provides new features including, calendar subscription for the Google calendar, optimised calendar invitation and confirmation, and usability improvements of calendar, tasks and permissions.

Rafael Laguna, CEO of Open-Xchange, said: The combination of our business-class email and collaboration with IP-based telephony, fax and other services provides users unmatched ease of use for their day-to-day communications. Enhancements to the user interface and the addition of Google Calendar integration provide users with a very competitive open-source alternative.