NBX/PBX Linux Based
 

Does anyone knnow or have information on software that is written for linux that will turn a linux box into a phone system. I know it exists (a friend told me he knows some one that put it together). If anyone can point me in the right direction I would appreceate it. Thanks.
David

The book Linux Toys explains how to set one up & there is also some information at their website linuxtoys.net. There is also a program for telephony using linux called Skype, but I haven't looked at it yet so it might not be what you are looking for.