Voipthe panasonic kx nt346 ip system phone is compatible with the panasonic kxtde telephone system as it is an ip system phone it needs to be connected to a lan and allocated an ip address to work if it is plugged into a standard extension or telephone line then the phone will not function backlit displaythe 6 line lcd is backlit so that even in a low light area the screen is easy to read below the display are four soft keys that the users can use to navigate through the menus24 programmabl