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IC401
Q101 AMP Q105 1 1 2 TIP RING 2 SIDE-TONE -CIRCUIT D101 TEL-JACK TR-RLY

VR401

MOD.

6

LPF

COMPRESER

LIMITTER

MAXIMUM DEVIATION ADJUST

TX-MUTE

+ ~ 4 - ~ 3

VR402 AMP

RX-MUTE

AF

9

LPF

EXPANDER

LINE-OUTPUT LEVEL-ADJUST

24

DATA-AMP

59 45 H/S-IN H/S-OUT 38 LINE IN 36 LINE OUT Q106 BELLDETECT 99 IC401, RF 64 Q751, Q752 56 RESET 57 POWER-DOWN 41 C-ID RESET 35

30

29

RX-DATA

SQL PLL-RST PLL-DATA PLL-CLK UNLOCK TX-POWER RX-POWER RLY BELL

97

TX-DATA

RX-MUTE

TX-MUTE

Q301, Q303 POWER DOWN IC301 6V REGULATOR DC-JACK 3 4 DC9V+ GND

24 21 22 23 26 25 20

SQL PLL-RST PLL-DATA PLL-CLK UNLOCK TX-POWER RX-POWER

IC701 (DSP)
Q312 TX-DATA 97 TX-DATA Q313 CHARGE-DET. 60 CHARGE DETECT

CHARGE-CONTACT 1 2 3 + C -

62

CLE

61

ALE

95

WE

83

WP

53

CE

IC702 (FLASH MEMORY)

94

RE

84-91

I/O 0~7 53 54 4.096MHz 65 INUSE LED701 CALL-ID 67 LED704 X701

82

LED702

ANSWER