Pag. 27
Technical
General diagram for a basic door phone installation in a building with three entrances.
DIAGRAM SCHEMATIC
BASIC FUNCTION
Pushing a button on the outdoor panel causes the call signal
Cp1, generated in the amplifier, to be sent along the call
line to the corresponding telephone, wich produces the
typical tremolo call tone. At same time, on pass into the
excitation terminal (I-K) of the automatic switcher this cau-
ses the common wires of the installation to be connected
to the corresponding outdoor panel.
Upon picking up the handset, a switch connects the
telephone to common audio cables (2 & 6), thus establishing
communication with the outdoor panel from which the call
was made.
MATERIAL NEEDED
In the dwellings
T1, T2, ...Tn Citymax Telephones Ref.: 8044
In the communal interior area
A1.1, A1.2 Audio Power Supply Ref.: 8787
A7 Distributor Power Supply Ref.: 88231
A5.1, A5.2, A5.3 Audio Switcher Ref.: 8811
In the street
P1, P2, P3 Outdoor panels (neccessary combination)
F1, F2, F3 Electric lock Ref.: 2911 (for other types consult catalogue)
E 1.5 DOOR PHONE SYSTEM
BUILDING WITH THREE ENTRANCES
Upon pushing the door release button on the telephone
this connects the wires 1 & 3 of the installation, which
causes the amplifier to activate the door release.
OBSERVATIONS
The communication is limited to 90 seconds, whatever panel
the call is made from. After this time the call is ended.
For a greater number of entrances we advise the Digital
Systems (MDS).
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