C
ONNECTORS
C
ONNECTORS ON THE DESK CONSOLE
8-way connector
The 8-way connector is on the back panel of the desk console. It is a male Nisshin
NS1508 or equivalent. It is used to interface to an external foot-switched PTT,
headset, microphone or morse key.
Figure 83:
Table 26: Pinouts of the 8-way connector
Pin no.
Function
1
Ground
2
External microphone
3
Bias for Electret
4
PTT
5
External earpiece
6
Ground
7
+5 V supply
8
External morse key
376
Front view of the 8-way connector
6
5
7
4
8
3
1
2
Input/output
Signal level
0 V
Input
To suit electret microphone
Output
+5 V via 3k2 resistor
Input
Active low, pull-up to 3.3 V
Output
20 mW max into 16 Ω
0 V
Output
+5 V, 100 mA max
Input
Active low, pull-up to 3.3 V
E
NVOY
™ T
R
RANSCEIVER
EFERENCE
M
ANUAL
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