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 (earlier versions were based on rPath Linux).
Mark Spencer has announced the release of AsteriskNOW 1.5.0, a CentOS-based Linux distribution and software appliance that includes Asterisk (the world's leading open-source telephony engine and toolkit), AsteriskGUI, and other software needed for an Asterisk system: "AsteriskNOW 1.5.0 is immediately available for download (existing users can run 'yum update' to keep up with releases, in some rare cases, users may need to run 'yum update glibc' first). Notable changes since beta 2: updated several packages to latest versions (Asterisk, DAHDI, etc); fixed more permissions issues between Asterisk and httpd/FreePBX; updated to CentOS 5.3.