Call from external unit (incoming)
On receipt of a call from an external unit, the display can appear in two different ways, depending on whether
the call is coming from an audio only or from an audio/video external unit:
Call from external unit (incoming), Audio
Call from external unit (incoming), Video
Note: the display of internal unit Art. 40505 switches on on receiving a call from an external unit to display the
signal of the external unit in accordance with its own programming, as indicated in the table below.