jamesva asks: "The telecommunications industry is rapidly converging on Windows NT/2000 for all telephony and voice-related needs. Most ACD systems, virtual operators, and voicemail are being ported to Windows if they're not already running on it. In the past, telephony apps have existed most notably on OS/2, SCO, and even DOS. However, free Unix (or unix-like) platforms have absolutely no penetration in this area, with seemingly no chance on the horizon. The Bayonne app server from the GNU folks seems to be the one exception, but even then there doesn't seem to much built around it or anyone using it. It reached a 1.0 release in September and was met with no fanfare. Even the LinuxTelephony doesn't seem to have much news. Can someone prove me wrong? Why is this the case? I'm interested in finding out if anyone is using Linux (or any free OS) in a production environment for something like voicemail or ACD. These types of systems require high availability and reliability and Linux just seems like a natural fit."