Protocols

FreeSWITCH supports the following protocols:

VoIP endpoint protocols

Signaling

• SIP
  • provided by mod_sofia
• H.323
  • provided by mod_h323
  • provided by mod_opal
• IAX2
  • provided by mod_opal
• SCCP (Skinny)
  • provided by mod_skinny
• Jingle / Google Talk
  • provided by mod_dingaling
• GSM
  • provided by mod_gsm
• ALSA
  • provided by mod_alsa
• PortAudio
  • provided by mod_portaudio

Media

• RTP
  • provided by Core
• UDPTL + T.38
  • provided by mod_spandsp

It is possible to bridge calls between any of the above protocols, in either direction.