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  • Rating & Routing Server
  • Transcoding B2BUA
  • IVR & Announcement Server
  • Conference Server
  • Voicemail Server
  • SBC (Session Border Controller)
  • Basic Topology Hiding Session Border Controller
  • DAHDI, Khomp, PIKA, Rhino, Sangoma and Xorcom Hardware Support
  • Fax server
    • T.38 gateway, termination, and origination mode
    • T.30 to T.38 and T.38 to T.30 gateway
    • See also: mod_spandsp
  • And, of course, a PBX

Features

  • WebRTC support
  • Centralized User/Domain Directory (directory.xml)
  • Nano Second CDR granularity
  • Call recording (In Stereo caller/callee left/right)
  • High Performance Multi-Threaded Core engine
  • Configuration via cURL to your HTTP server (mod_xml_curl).
  • XML Config files for easy parsing.
  • Protocol Agnostic
  • ZRTP support for transparent RTP based key exchange and encryption
  • Configurable RFC 2833 Payload type
  • Inband DTMF generation and detection.
  • Software based Conference (no hardware requirement)
  • Wideband Conferencing
  • Media / No Media modes
  • Proper ENUM/ISN dialing built in
  • Detailed CDR in XML
  • Radius CDR
  • Subscription server
    • Shared Line Appearances
    • Bridged Line Appearances
  • Enterprise/Carrier grade Eventing Engine. (XML Events, Name Value Events, Multicast Events)
  • Loadable File formats and streaming
  • Stream to and play from Shoutcast and Icecast
  • Multi-lingual Speech Phrase Interface
  • ASR/TTS support (native and via MRCP)
  • Basic IP/PBX features
  • Automated Attendant
  • Custom Ring Back Tones (Early Media)
  • XML-RPC support
  • Multiple format CDRs supported
  • SQL Engine provides session persistence
  • Thread Isolation
  • Parallel Hunting
  • Serial Hunting
  • Mozilla Public License
  • Support
    • Paid support available
    • Free support via IRC & E-mail
  • Many supported codecs
    • CELT (32 kHz ahd 48 kHz)
    • G.722.1 (wideband)
    • G.722.1C (wideband 32 kHz)
    • G.722 (wideband)
    • G.711
    • G.726 (16k, 24k, 32k, 48k) AAL2 and RFC 3551
    • G.723.1 (passthrough)
    • G.729AB (Requires a license unless using passthrough)
    • AMR (passthrough)
    • iLBC
    • Speex (narrow and wideband) with RFC 5574 fmtp support
    • LPC-10
    • DVI4 (ADPCM) 8 kHz and 16 kHz
    • SILK
    • OPUS - RFC 6716
    • Video Codecs (passthrough):
      • Theora
      • H.261
      • H.263
      • H.264
      • MP4
    • See also: codecs
  • Live Migration of calls from one FreeSWITCH box to another. See Freeswitch_HA

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