• Electronic call. • Two positions electronic call volume regulator with on-off function. • Privacy on audio and door open progresses. • Input for door bell apartment push button. • Different call reception tones depending where the call is coming from. • Uses the lock release push button to call to the concierge unit, with panic call facility. • Background tones in the telephone handset confirm that outgoing calls are in progress. .

• Additional push button with one of the followings selectable functions:. o Activation of auxiliary devices using SAR-12/24 relay units. o Intercommunication between two “Plus” units in the same apartment. o Call to a second concierge unit. • Output for activation of a SAV-90 call repeater or a SAR-12/24 relay unit during call reception. • The maximum number of units inside the same apartment, without additional power supplies, is three.