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[https://freeswitch.com/ FreeSWITCH] is a voice service that can be used with [http://opensimulator.org/wiki/Main_Page Opensimulator]. Until recently it has been a little-used option; however, with the announcement that Vivox support for opensimulator is coming to an end, it is one of the alternative options. This page is not complete, the compilation works, and the plugin states it's active in the console. Additionally in the viewer in the voice preferences voice can be tested successfully. However, neither local nor IM voice chat buttons are enabled.

 This page is aimed at adding to the information available for both getting a working version of FreeSwitch and configuring it for opensimulator. At the time of writing the latest release is 10.6.

* [http://opensimulator.org/wiki/Freeswitch_Module Opensimulator Wiki - FreeSwitch page]* [https://computingforgeeks.com/how-to-install-freeswitch-pbx-on-ubuntu/ Setup Free Switch on Ubuntu 20.04 - Computing for Geeks] - linked to from the Opensimulator Wiki* [https://www.programmersought.com/article/63125535268/ Freeswitch installation and Zabbix monitoring] - by [https://www.programmersought.com/ Programmer Sought]* [https://files.freeswitch.org/freeswitch-releases/ FreeSwitch Releases] == Compile And Install == === Compile And Install on Ubuntu 20.04 Server ===The packages listed are a combination of those found so far after starting from three different images of ubuntu 20.04 server including a direct download ==== Ubuntu Packages Required ====* build-essential* git* unzip* autoconf* cmake* Libtool* pkg-config* libcurl4-opensssl-dev* python-pycurl* python3-pycurl* python3-pycurl-dbug* libtiff-dev* libaudiofile-dev* fftw-dev* sqlite3* libsqlite3-dev* libcurl4-openssl-dev* libpcre3-dev* speex* libspeex-dev* libspeexdsp-dev* libldns-dev* nasm* libavformat-dev* libswscale-dev* liblua5.3-dev* libpq-dev - required to compile Spandsp* libx11-dev - required to compile Fltk* libfreetype-dev - required to compile Fltk* libssl-dev - required to compile Sofia* uuid - required to compile Libks* uuid-dev - required to compile Libks* libedit-dev* libopus-dev* libsndfile-dev   sudo apt install build-essential autoconf cmake libtool pkg-config libcurl4-openssl-dev python-pycurl python3-pycurl libtiff-dev libaudiofile-dev fftw-dev sqlite3 libsqlite3-dev libpcre3-dev speex libspeex-dev libspeexdsp-dev libldns-dev nasm libavformat-dev libswscale-dev liblua5.3-dev libpq-dev libx11-dev libfreetype-dev libssl-dev uuid uuid-dev git unzip libedit-dev libopus-dev libsndfile-dev ==== [https://github.com/fltk/fltk Fltk] ====Required by Spandsp  git clone https://github.com/fltk/fltk.git cd fltk cmake . make sudo make install ==== [https://github.com/freeswitch/spandsp Spandsp] ====  git clone https://github.com/freeswitch/spandsp cd spandsp ./bootstrap.sh ./configure make -j sudo make install === [https://github.com/freeswitch/sofia-sip sofia-sip] ===  git clone https://github.com/freeswitch/sofia-sip cd sofia-sip sh autogen.sh (if building from darcs) ./configure make sudo make install ==== [https://github.com/signalwire/libks.git libks] ====<syntaxhighlight lang="Bash" line>git clone https://github.com/signalwire/libks.gitcd libkscmake .make sudo make install</syntaxhighlight> === [https://github.com/signalwire/signalwire-c.git Signalwire] ===  git clone https://github.com/signalwire/signalwire-c.git cd signalwire-c cmake . make sudo make install === Free Switch ===First download, extract and enter the folder.    sudo wget https://files.freeswitch.org/freeswitch-releases/freeswitch-1.10.6.-release.zip unzip freeswitch-1.10.6.-release.zip cd freeswitch-1.10.6.-release  Copy lua5 files to where they should be, but are missing from the release files.   mkdir src/mod/languages/mod_lua cp /usr/include/lua5.3/*.h src/mod/languages/mod_lua/  add a symbolic link so its found  sudo ln -s /usr/lib/x86_64-linux-gnu/liblua5.3.so /usr/lib/x86_64-linux-gnu/liblua.so  compile  ./configure make sudo make install Compile the sounds  sudo make all cd-sounds-install cd-moh-install  Create Symbolic links for ease of use  sudo ln -s /usr/local/freeswitch/bin/freeswitch /usr/bin/ sudo ln -s /usr/local/freeswitch/bin/fs_cli /usr/bin ==== Configure FreeSWITCH ====Once you've compiled and installed Freeswitch, you will need to activate mod_siren and mod_xml_curl in /usr/local/freeswitch/conf/autoload_configs/modules.conf.xml, since it's disabled by default on a fresh install. This bit needs doing as root  su root nano /usr/local/freeswitch/conf/autoload_configs/modules.conf.xml uncomment the lines...  <load module="mod_xml_curl"/>and  <load module="mod_siren"/> save and exit then su back to your normal user ====Create a user with limited rights to run freeswitch====  cd /usr/local sudo groupadd freeswitch sudo adduser --disabled-password --quiet --system --home /usr/local/freeswitch --gecos "FreeSWITCH Voice Platform" --ingroup freeswitch freeswitch sudo chown -R freeswitch:freeswitch /usr/local/freeswitch/ sudo chmod -R ug=rwX,o= /usr/local/freeswitch/ sudo chmod -R u=rwx,g=rx /usr/local/freeswitch/bin/  ==== Create a systemd service file to start automatically==== sudo nano /etc/systemd/system/freeswitch.service added the following contents and save  [Unit] Description=freeswitch Wants=network-online.target Requires=syslog.socket network.target local-fs.target After=syslog.socket network.target network-online.target local-fs.target [Service] Type=forking Environment="DAEMON_OPTS=-nonat" EnvironmentFile=-/etc/default/freeswitch ExecStartPre=/bin/chown -R freeswitch:freeswitch /usr/local/freeswitch ExecStart=/usr/bin/freeswitch -u freeswitch -g freeswitch -ncwait $DAEMON_OPTS TimeoutSec=45s Restart=always RestartSec=90 StartLimitInterval=0 StartLimitBurst=6 User=root Group=daemon LimitCORE=infinity LimitNOFILE=100000 LimitNPROC=60000 LimitSTACK=250000 LimitRTPRIO=infinity LimitRTTIME=infinity IOSchedulingClass=realtime IOSchedulingPriority=2 CPUSchedulingPolicy=rr CPUSchedulingPriority=89 UMask=0007 NoNewPrivileges=false [Install] WantedBy=multi-user.target start the service sudo systemctl start freeswitch.service check its working with sudo systemctl status freeswitch.service enable the service so it starts each time at boot sudo systemctl enable freeswitch.service == Configure Opensimulator ==Grid ModeIn grid mode, [FreeSwitchVoice] in OpenSim.ini and [FreeswitchService] in Robust.ini or Robust.HG.ini need to be configured. Configurations details are shown in both OpenSim.ini.example, Robust.ini.example and Robust.HG.ini.example. Here is an example configuration for OpenSim.ini. opensim.ini  [FreeSwitchVoice] Enabled = true LocalServiceModule = OpenSim.Services.Connectors.dll:RemoteFreeswitchConnector FreeswitchServiceURL = "${Const|BaseUrl}:${Const|FreeSwitchPort}/fsapi"  Add for Robust.ini/Robust.HG.ini  [FreeswitchService] LocalServiceModule = OpenSim.Services.FreeswitchService.dll:FreeswitchService ServerAddress = "${Const|FreeswitchURL}"