Oki B4100 - Manual (Page 454)

40055101TH Rev.4
454 /
Figure A3.7.3 Block Diagram of FN5
TEL1
TEL2
T
RL7
F
IC 2 F
IC 1 D
SR
8
RL2
RL1
CML
S
AR
1
, AR
2
arresters
CN26/CN36
(F) (UK)
CN26, CN36
MUTE
IC 7
R
Q1, Q2 Q3 4
H
0
9 DBI DP IC5
IC 6
Q
C 11
C
31
R
590
RL3
T 1
C
E
MUTE
FICC
Receiving
sensitivity
Adj
PP
A
G
S5-1, 2
6
Constant
current
DC
current
Impedance
matching NT
5
R
Rp
S
RI
OH2
to Modem
RL6
Ring Detector
B
3
7
1
Shunt TEL
CN1
LINE
CN2
(1/2)
CN2
(2/2)
OFF-HOOK
Detector
CN3
S5-3 to 6