...Plan 9 didn't have much commercial success, although Vita Nuova does sell a version called Inferno. Getting a mainstreamoperating system off the ground is hard: you must convince programmers, software companies, and hardware makers to embrace...
http://news.cnet.com/8301-30685_3-10395355-264.html
...Pure software based PBX – not an appliance! A key point is that a software PBX is PBX software running on a mainstreamoperating system that can easily be managed by the average administrator. So NOT yet another appliance running some custom...
http://www.3cx.com/voip-articles/whitepaper.pdf