In order to drive down costs and ramp up the speed of innovation, AT&T is taking an open source-first approach to virtualization. While some service providers, such as CenturyLink, pick and choose elements of open source, AT&T is all in. AT&T has its fingers in various open source groups, many of which it has championed in the early going before turning them over to an open source community.
Source:
Fierce Telecom
