Oki B4100 - Manual (Page 448)

40055101TH Rev.4
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Figure A3.7.1 Block Diagram of UNC
TEL1
TEL2
CN2 (2/2)
CN2 (1/2)
CN1
AR
1
, AR
2
arresters
1
LINE
SR RL 2
CML
RL 1
7
8
C31 R5
C
DP RL3
B
R 10 , 11
4
T 1
E 5
Impedance
matching
NT
PP
RL6
A
Receiving
Sensitivity
Adj
R 574 , R 504
6
R
Rp
S
RI
02
CN3
OFF HOOK Detector
IC
2
IC1
D
C4
to Modem
F
Ring Detector