Asterisk xAP Connector and xAP SwitchBoard
Asteriskis a "digital PBX" that is used to integrate telephony equipment with traditional analog PSTN and more recent VoIP lines.
The Asterisk xAP Connector (axc) provides a gateway between Asterisk and xAP-enabled devices. xAP Switchboard (SB) implements xAP-enabled telephony monitoring and dialing services. Collectively, axc and SB bridge advanced telephony with home automation.