16 ringing tone melodies. Door, floor and internal call ringing tone assignment. Cancel button for ringing tone, with status LED. 3 menu operating buttons for settings and for triggering the functions shown in the display. Menu access and switching by horizontal swiping movement on the touch control surface. Illuminated TFT colour display. Display of moving camera images from video front-door stations or external cameras. Symbol line for displaying the menu key assignment. Display of the calling door/internal station number. Display brightness and contrast adjustable in steps. Ringing tone volume and microphone sensitivity adjustable in steps. Hands-free or push-to-talk. Acoustic and optical call signalling via LED and video image display. Storey call forwarding. Parallel operation of up to 3 indoor stations.