Asterisk?

may i ask? what is asterisk? how does it work? i only know that asterisk is got to do with VoIP. in this case, how do i set-up the asterisk too??? thanks!

Asterisk is an open source VOIP PBX. A PBX (private branch exchange) is a server used for managing multiple phone devices and call routing within an organization.

For a good resource getting started with asterisk go to:

http://www.voip-info.org/wiki/view/Asterisk