Panasonic KX-TC1743B Service Manual page 89

-51dBm/600
1.1kHz
Call ID data
IC332
3.3V 3.6V
SP Phone TX
SP PhoneRX
KX-TC1743B/F/G/W/PW: SCHEMATIC DIAGRAM (Base Unit)
IC331
6.0V
IC100
3.2V
TALK TX
TALK RX
Input 1.1kHz
140mVp-p
(-25dBm/600 )
Output
9V DC.
for H/S