The Other Open-Source IP PBX

“The story has a familiar ring. A vendor offers powerful,
reliable new appliances to go with the open-source IP PBX (Private
Branch eXchange) software it provides and supports. The new boxes
make it easier for users to turn the software into business phone
systems that are significantly cheaper than proprietary solutions.
Given the enthusiastic reception small companies have been giving
similar efforts, it might seem this idea can hardly miss…”