PLEASE VISIT http://www.freeswitch.org for more up to date info.

What is it?

FreeSWITCH™ is an open source communications platform. FreeSWITCH™ is a library which ships with a small executable that loads the library, launches the core, and performs the various tasks that are defined by the modules. In its base form FreeSWITCH™ is a soft-switch or PBX telephony application, not completely unlike Asterisk but capable of handling thousands of simultaneous calls.

FreeSWITCH™ makes it possible to build a softphone, PBX system, soft-switch, or interface with other open source PBX systems such as OpenPBX.org, Bayonne, YATE or Asterisk. It can also be used to build a voip switching platform uniting various technologies such as SIP (using the Nokia Sofia library), H.323, IAX2, LDAP, Zeroconf, XMPP / Jingle etc.

As a library FreeSWITCH™ can be used by developers to enable switching in their custom applications. FreeSWITCH™ can be launched not only from a C application, but also via PHP, Perl, or a variety of other languages.

FreeSWITCH™ is written in C, built from the ground up (not a fork of another code base). It is designed to take advantage of as many existing software libraries as possible. It has a modular, extensible architecture, with few and necessary functionality in core ([libfreeswitch]]) with optional modules to do the rest.

FreeSWITCH runs on Windows, Mac OSX, Linux, *BSD, ARM, and other Unix flavours.

It is licensed under the MPL.

Features

• Runs on Win32/MAC/UNIX
• IVR Application API
• 8kHz/16kHz/32kHz/48kHz Audio
• Soft Conferencing
• SIP B2UA/SRTP/TLS
• SIP BLF/SLA/PBX Features
• Presence
• GoogleTalk
• IPv4/IPv6
• ENUM/ISN
• Async Audio
• Event/Logger Engine
• Real Time
• zRTP (libzrtp)

Supported protocols

•SIP (Sofia-Sip)
•IAX2 (LibIax2)
•Google Talk (dyngaling)
•H.323 (OPAL) (Beta)
•Skype (SkypIax) Watch 4 part video of Giovanni Maruzzelli on SkypIax.

VoIP Today News

• Official FreeSWITCH Training Announced! (25 May 2010 | 2:34 am PDT)
• FreeSWITCH and FreePBX v3 Tutorial On Chillingsilence. (28 Apr 2010 | 11:59 pm PDT)
• FreeSWITCH Connector For Vestec Now Available. (28 Apr 2010 | 12:14 am PDT)
• G.729 Codec Licenses Now Available For FreeSWITCH! (18 Apr 2010 | 11:41 pm PDT)
• FreeSWITCH, an amazing open source PBX and telephony solution. (17 Mar 2010 | 11:35 pm PDT)

News Resources

• freeswitch.net.ru - Latest News About FreeSWITCH - Communication Consolidation in English, Russian, Ukrainian
• VOIP Today Magazine -Keep up to date on the latest news and views about VoIP and FreeSWITCH PBX.
• Freeswitch G.729 Transcoding Products - Purchase G.729 Transcoding Products from Howler Technologies.