The default IP address of the LAN port is 192.168.2.1 and the web configuration page can be reached by typing the address into a browser (if the WAN port has been enabled for web configuration you can find its IP address by dialling "***" and then "02" at the voice menu prompt).
Change the settings that are highlighted orange in the screen grab below ensuring that the references to "Blue Face Demo" are replaced with your own details. Your Blueface Username and Password respectively should be entered in the fields marked in red.