FreeSWITCH

FreeSWITCH is free and open source, scalable and cross-platform telephony software designed to route and interconnect popular communication protocols. It provides a stable telephony platform on which many applications can be developed using a wide range of free tools. The source code of FreeSWITCH is available under the MPL software license.

Learn more

• https://freeswitch.org
• https://en.wikipedia.org/wiki/FreeSWITCH
• https://www.openhub.net/p/freeswitch