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J1

to Tel_Line A B

Bridge Rect

Hook Switch

Audio

TXAF 28 RXAF 24

A/D D/A Analog Front End

Speech Encoding Speech Decoding ADPCM Codec Filter DSP

Burst Building Burst Decoding

9 5 30 11 63 64 6

TXDA RXDA RSSI SYRI

4 33 20 30

ANT1 ANT2

RINGER

BMC

RF Interface

IC3
SYEN 10

HOOK DTXAF DTXAF

61 26 27

RF Module BBIC Interface Limit Register CHARGE CONTACT

CPU

18

XTAL 10.368 MHz

VUNREG

IC2

16

to AC Adaptor

J2

4.0V Reg. 4.0V 2.65V Reg. 2.65V EEPROM

IC1

6 5

SCL SDA

41 40

BBIC

KX-TCD430FXB/FXC/FXW BLOCK DIAGRAM (BASE UNIT)