AsteriskNOW
AsteriskNOW is a software appliance, a customized Linux distribution that includes Asterisk, the AsteriskGUI, and all other software needed for an Asterisk system. The world's leading open source telephony engine and toolkit, Asterisk can now be easily configured with a graphical interface. AsteriskNOW includes all the Linux components necessary to run, debug and build Asterisk. Since version 1.5, AsteriskNOW is based on CentOS.
Learn More @ www.asterisknow.org
