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N.M

LINE VOLTAGE 60V DC
0R0 N.M

N.M

N.M N.M

+60V DC ON-HOOK +4.8V DC OFF-HOOK
N.M

0V ON-HOOK +4.6V DC OFF-HOOK
N.M

0V ON-HOOK +2.8V OFF-HOOK
390R

N.M

60V DC
0R0

N.M N.M 1K 150n

RX-AF
0R0 10R 10uF

0R0

N.M

0V ON-HOOK +0.7V OFF-HOOK
2K2 10K

3n3

TX-AF

N.M.

15k

N.M

N.M N.M..

N.M 47k

47k 220k N.M. 150p

470k

IC3

IC4
N.M.

IC2

470k

1.5V DC
270k

150p

CLIP (CALLER ID)

N.M N.M

+2.65V PULLS TOWARDS 0V DURING RING

N.M N.M

N.M

N.M

CHARGE PULSE RING

12V DC

3.8V DC

2.65V DC

IC7
110R

110R

110R

HANDSET ON CHARGE +12V +5V