- http://www.asteriskdocs.org/ - CC available book on older version of Asterisk PBX
- https://developer.signalwire.com/fr...scellaneous/Users-Guide-Introduction_9633805/ - FreeSwitch.com redirects to signalwire.com/freeswitch
www/fusionpbx is a network user interface for FreeSwitch. There used to be a few network interfaces and GUI's for Asterisk in ports. While many Asterisk GUI's and network interfaces are defunct, there are still a few available online.
Ports: net/freeswitch, net/asterisk18, net/asterisk20, net/asterisk22
Additional telephony ports: net/yate & comms/deforaos-phone