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
69
GENERAL CATALOGUE
The 4838 Speaker Units incorporate call progress LED’s and reassurance tones along with the benefits 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 different 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 different 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 LED’s on the front panel.
-- The first 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
another 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 oper-
ated. 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
