Conference Bridge connects a number people participating
in conference-calls. It represents itself a server that works as a telephone
and can respond to many calls simultaneously.
Main portion of the advantages of the Asterisk server appears from it being an open source downloadable product. Most of the users, especially business people, can find it difficult to understand the idea behind this principle, or free software, but a business models behind open source are different and specific, as in case with Asterisk server.