Caller Id Detect Circuit - Panasonic KX-TSC10EXB Service Manual

current flow through the circuit) and the following signal flow id for
the DC loop current. T
D101 R
- The receiving signal flows:
TEL line Q102
Q404 H/S SP
- The transmission signal flows
Mic Q422
9.3.2. Inializing Circuit
9.3.2.1. Function
This circuit is used for to initialize the microcomputer when it incorporates batteries.
9.3.2.2. Circuit operation
When the batteries is inserted into the unit, then the voltage is regulated by IC302 and power is
supplied to the CPU. The set can operate beyond point A in the circuit voltage diagram.

9.4. Caller ID Detect Circuit

9.4.1. Function (FSK signal)
The caller ID is a changeable ID which the user of a telephone circuit obtains by entering a
contract with the telephone company to utilize a caller ID service. For this reason, the operation
D101
C405 C401
R428 C427
Q102 Q108
R401 Q401
Q108 Tel Line
17
R114 D103
Q403