User guide

EXTERNAL PAGING INTERFACE -
STATION PA PORT
Any station port can be programmed as a PA port and
used to couple a station voice path to an external
paging amplifier. Refer to Chapter for programming
details. Figure 3-7 shows connection details for this
feature.
•
The audio input of an external paging amplifier can
be connected to the audio pair of the station port at
the J-1 or J-2 connector blocks for models N0616,
N0820, and N1024 or at the barrier-type terminal
strip on the model N0308 common equipment
cabinet.
•
The audio input connection must be isolated with a
600 ohm to 600 ohm audio matching transformer.
Terminate the audio input of the paging amplifier
with a 600 ohm (nominal value) resistor.
•
If station port 15 is programmed as a PA port,
the Common Audible contact points on J-2 are
automatically reconfigured as PA enable terminals.
The contact closure now occurs when PA station 15
is dialed. The normal common audible function is
disabled as long as station 15 is a PA station.
•
If station port 17 is programmed as a PA port,
the Auxiliary Station Interface (station 17 audible)
contact points are automatically reconfigured as PA
enable terminals. The contact closure now occurs
when PA station 17 is dialed. The normal auxiliary
station interface function is disabled as long as
station 17 is a PA station.
IMI 66-064 System Description
3-14