Fermax CITYCOM III CENTRAL GUARD UNIT Manual page 21

If you go into HOUSE-PANEL mode without the house phone being answered,
the Central waits for 30 seconds for the house to answer; if it does not, the system
returns to GUARD UNIT-HOUSE status.
To enter this state from the Central you must press the yellow pushbutton.
In AUTOMATIC mode, the Central goes into HOUSE-PANEL
automatically when a call is made to a house from the outdoor panel.
GUARD UNIT - PANEL
In this state, the Central enables communication between the outdoor panel and
the guard unit. To go into this state, the concierge must pick up the phone and press
the GUARD UNIT-PANEL button (red button).
Once communication is established, the status indicator (red LED) keeps blinking
while the call lasts. When the concierge hangs up, the system goes into GUARD UNIT-
HOUSE mode automatically.
3. TECHNICAL FEATURES
Power Source Tension
Management by Micro-controller
Status changes by Pushbutton and signalling LED
Night (OFF) / Day (ON) key
FERMAX ELECTRÓNICA S. A. E.
CITYCOM III Guard Unit Central
9 - 12 Vdc
3
mode
Code 94487 V-02/04