FreeSWITCH is a telephony and media-processing platform for building communications services. It can operate as a softswitch, PBX, media gateway or application server, handling calls between different endpoints while providing facilities for recording, conferencing and interactive voice response.
The platform is built around a multithreaded switching engine with a modular architecture. Administrators can configure call handling through an XML-based dialplan, while developers can integrate FreeSWITCH with external applications and services. This flexibility makes it suitable for anything from a small telephone system to a larger communications platform handling substantial call traffic.
FreeSWITCH can be deployed independently or used as the underlying engine for management systems such as FusionPBX. It supports communication with SIP phones, service providers and other compatible telephony infrastructure.
This is free and open source software.
Key Features
- SIP endpoint and gateway integration through the mod_sofia module.
- Multithreaded switching engine capable of handling simultaneous call sessions.
- XML dialplan for call routing, number manipulation and application execution.
- Audio and video conferencing through the mod_conference module, including participant management and conference recording.
- Interactive voice response, automated attendants and DTMF processing.
- Call recording, voicemail, call transfer, call parking and music on hold.
- Wideband and narrowband audio codecs, with transcoding between compatible formats.
- Event Socket Library and mod_event_socket for controlling sessions from external applications.
- Dynamic configuration retrieval through mod_xml_curl.
- Speech recognition and text-to-speech integration through supported modules and external engines.
- Call detail records, accounting information, diagnostics and event-based monitoring.
- Media bypass and media proxy modes for different network topologies.
Website: github.com/signalwire/freeswitch
Support:
Developer: Anthony Minessale II and contributors
License: Mozilla Public License v1.1
FreeSWITCH is written in C. Learn C with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
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