Thanks to a cooperative effort with Polycom, FreeSWITCH can use Polycom's Siren codecs for wideband and super-wideband audio. The software also adds a free open source codec using Constrained Energy Lapped Transform (CELT) technology that should provide sample rates of 44.1 to 48 KHz with minimal latency, especially suited for speech and music.

The FreeSWITCH community also added new modules for designing telephony applications. The release announcement especially highlights the community's contribution of mod_fax for the fax capability. And the fs_cli command line client allows admins to connect to local and remote FreeSWITCH instances from a single terminal.

FreeSWITCH source code is available as a tarball, but also as binaries from the OpenSUSE Build Service and unofficial packages for Ubuntu. The software is under Mozilla Public License (MPL).