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LINE VOLTAGE 60V DC
60V DC
NC
15k
NC
NC
IC4
NC
+2.65V
PULLS TOWARDS
0V DURING RING
HANDSET ON CHARGE
+12V
+5V
+60V DC ON-HOOK
+4.8V DC OFF-HOOK
NC
NC
NC
47k
220k
470k
IC2
470k
NC
NC
NC
12V DC
IC7
NC
NC
NC
NC
NC
NC
0V ON-HOOK
+0.7V OFF-HOOK
47k
150p
IC3
1.5V DC
270k
150p
NC
NC
NC
RING
3.8V DC
0V ON-HOOK
+4.6V DC OFF-HOOK
0V ON-HOOK
+2.8V OFF-HOOK
NC
TX-AF
CLIP
(CALLER ID)
CHARGE PULSE
RX-AF
2.65V DC
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