Specifications

Art.4838-0
Art.4203-0
Art.4303N-0
Art.4838-1
Art.4203-1
Art.4303N-1
Art.4838-1D
Art.4203-1D
Art.4838-2D
Art.4203-2D
Art.4838-2
Art.4203-2
Art.4303N-2
59
The 4838 Speaker Units incorporate call progress LED’s and reassurance tones along with the benets of micro-
processor technology.
The 4838 Speaker Unit is the building block for the following types of system.
- Audio door entry systems with multiple entrances without the need of the audio two entrance exchange
(Art.502).
- Video door entry systems without the need of the control unit (Art.890) and on multiple entrances, without the
need of the video two entrance exchange (Art.892).
- With an additional wire, allows for the inclusion of a local door bell (only on system without privacy of speech)
having a dierent call tone from the external call.
The Art.4838 (in each version) has a dip-switch that allows for the adjustment of the following settings:
- To set one of 4 dierent call tones.
- To set the number of rings.
- To set the conversation time.
- To set the door opening time.
In addition to conventional acoustic signals, the 4838 speaker unit gives visual indication relevant to the system
operation by the 4 LEDs on the front panel.
- The rst LED (red) marked by the symbol
, if switched ON, indicates that it is not possible to make a call
because a call or a conversation is in progress (from the outdoor station from which you are calling or from an-
other outdoor station on system with multiple entrances).
- The second LED (red) marked by the symbol
, if switched ON, indicates that a call is in progress. The LED will
be switched OFF when the call is answered.
- The third LED (yellow) marked by the symbol
, if switched ON, indicates that it is possible to speak.
The LED will be switched OFF at the end of conversation (or at the end of the conversation time).
- The fourth LED (green) marked by the symbol , if switched ON, means that the door
lock has been operated. It will be switched OFF at the end of the “door opening” time.
As a result of the above features, the 4838 speaker units provide a cost effective solution with more
features and, at the same time simplify installation.
Art. FOR “4+1” AUDIO DOOR ENTRY SYSTEMS & VIDEO DOOR ENTRY SYSTEMS
4838-0 0 Call push button.
4838-1 1 Call push button.
4838-2 2 Call push buttons.
4838-1D 2 Call push buttons.
4838-2D 4 Call push buttons.
4000Series
Modular System