Panasonic KX-TG2257BXS Service Manual page 81

-51dBm/600
1.1kHz
Auto
Disconnect
Circuit
Call ID data
IC332
Reset
Circuit
3.6V
3.3V
3.2V
SP Phone TX
SP PhoneRX
81
IC331
7.5V
IC100
Charge
Circuit
TALK TX
TALK RX
KX-TG2257BXS SCHEMATIC DIAGRAM (Base Unit)
KX-TG2257BXS
Input 1.1kHz
140mVp-p
(-25dBm/600 )
Output
9V DC.
for H/S