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cable and RJ45 connectors. Microphones may be located anywhere in the system, provided that the total cable length does not exceed 1 km.
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on its type. The upper diagram shows a host device equipped with the Digital Paging Interface; in this case, the connection may be made with
another ordinary CAT-5 cable.
The lower diagram shows connection to the host being made via the analogue interface, comprising the audio signal from the microphone itself,
and zone selection commands made by short-to-ground contacts. By using the PM’s simple analogue connection, a single unit can interface with
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CAT-5 cable.
System Example
IN
OUT OUT
CAT-5CAT-5
CAT-5 CAT-5CAT-5
(with Digital Paging Interface)
IN
OUT
CAT-5
IN
CAT-5
IN IN
OUT
AUDIO OUT
ZONE ACCESS CONTROL
Mixer
IN
OUT
MIC INPUT PAGING ACCESS
Mixer
+12V
Z1 Z2 Z3 Z4 Z5 Z6 Z7 Z8
0V
LF
HF
GAIN (dB)
50
123
10
+
-
-
+
(with Analogue Paging Interface)
CDPM
GAIN (dB)
IN
THRU
-10
+10
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