Linux Magazine: Free and Open: An Interview with Mark Spencer, the Creator of Asterisk PBX

“Asterisk PBX changed the way teleco viewed Linux and Open
Source. Things may never be the same.

“Created in 1999, Asterisk PBX is widely considered the first
Open Source PBX to run on commodity hardware. Mark Spencer
initially wrote Asterisk because his start-up needed a PBX and he
didn’t want to put capital into an expensive phone system. While
initially created to solve an in-house problem, it has since
evolved into a company, Digium’with Spencer as its
president’earning $10 million in yearly revenue and a respected PBX
capable of scaling from small-to-large enterprise deployments as
well as handling carrier-grade applications…”