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NPE
ON-BOARD
MICROPROCESSOR
PORT
I/O
CIRCUIT
GROUND
DETECTOR
T.O
R.O
PORT
S.0
CIRCUIT
S1.0
0
SZ.0
SZ1.0
I
I
I
I
I
TO
AUXILIARY
EQUIPMENT
T.3
R.3
PORT
S.3
CIRCUIT
S1.3
3
SZ.3
SZ1.3
/
Figure 3-18. Unique Auxiliary Trunk (TN763) Circuitry
3-36