An interface unit for employment at a dentist's or dental
treatment/workstation, which is provided for the purpose of passing on
signals containing image information, has at least two inputs for
receiving input signals containing image information, at least two
outputs for passing on output signals containing image information to one
or more displays connectable with the interface unit and/or to further
interface units, and at least one internal transfer unit for selectively
passing on of the input signals containing image information to the
outputs. There is further provided a processing unit for conversion of an
analog video input signal into an output signal corresponding to a PC
standard.