Oki B4100 - Manual (Page 486)

40055101TH Rev.4
486 /
Figure A3.8.4 Block Diagram of TEL-W2D (option)
Connected to
NTIF Circuit
CN2
CN3
TEL-W2 (option)
Sending
Frequence
Responce
Circuit
Sending Level
Adjustment
Side Tone
Adjustment
Return Loss
Circuit
Receiving
Level
Circuit
Manual Pad
Adjustment
Automatic
Gain
Control
DC V-1
Characteristics
Circuit
Charge Pulse
Elimination
Characteristics
Circuit
+
-
~
~
DB1
Rectifier
Speech IC (IC1)
Microphone
Handset
Receiver
+
Connected to
HOOK Circuit
VL
RIN
CL
RPO
MPAD
AGC
TIN+
TIN-
R01
R02
CN5
Sending
Frequency
Circuit
TFC