Asterisk is the no. 1 open source communications toolkit.
Asterisk powers IP PBX systems, VoIP gateways, and conference servers, and is used by SMBs, enterprises, call centers, carriers, and governments worldwide.
Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers, and other custom solutions. It is used by small businesses, large businesses, call centers, carriers, and government agencies, worldwide.
FreePBX is a web-based open-source graphical user interface (GUI) that manages Asterisk, a voice over IP and telephony server. FreePBX is licensed under the GNU General Public License version 3.
Asterisk, as a server, is a SIP registrar and location server and also acts as a useragent endpoint (softphone).
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