
Digibell Vandal Resistant System
PD-169 Issue 3B Installation Guide Page 27 of 56
DBA-4I 4 Way Phone Isolator
The DBA-4I Isolator is used to distribute wiring to up to 4 flats, whilst providing isolation
between flats. This isolation ensures that a cable fault within one flat will not stop phones
within other flats functioning.
There is a maximum of 2 phones in each flat. Adding a 2
nd
phone / extension phone reduces
the maximum number of flats that can be powered from the same Power supply.
Isolator PCB’s are normally supplied in an individual ABS plastic enclosure, but can be
supplied in multiples in a lockable IP55 Steel cabinet (with or without power supplies). All
control equipment must be placed in a protected indoor environment.
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