Connect and configure a Call4tel FXS Gateway with 3CX, from hardware to provisioning.
Download, prepare, and upload the Call4tel FXS device template for 3CX to recognize.
Connect ISDN (PRI/BRI) lines to 3CX through the Call4tel E1 Gateway.
Configure the AiO64's combined 3CX server and FXO/FXS gateway in one appliance.