Open-Xchange, a provider of business-class open source collaboration software, today announced enhancements that give users telephone and fax integrated with e-mail, contacts, calendar and task information. By combining Open-Xchange (hosted and on-premise editions) with Unified Communications and Virtual PBX solutions, businesses can replace their traditional phone lines -- saving on phone bills.

Open-Xchange, the leading provider of business-class open source collaboration software, announced today the availability of a free connector for Mozilla Thunderbird, the cross-platform e-mail and news client developed by the Mozilla Foundation.