What features are included in an open source IP PBX?
Open source PBX systems are generally quite feature rich and robust. For example, Asterisk offers traditional PBX functionality, as well as more advanced features found with VoIP systems. Asterisk contains nearly all of the features that a buyer would expect to find in an enterprise-class PBX including directory-based voicemail, conference calling, integrated messaging, interactive voice response (IVR), three-way calling, caller ID, and call queues. There are many additional features as well.
