Panasonic KX-TSC11MXB, Service Manual

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14.4. Caller ID Detect Circuit
14.4.1. Function (FSK signal)
The caller ID is a chargeable 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 of this circuit assumes that a caller ID service contract has been
entered for the circuit being used.
The Caller-ID data from exchange is supplied to the telephone using the method of FSK and displayed on LCD of the unit.
• • • •
FSK (Frequency Shift Keying) format
14.4.2. Circuit operation
Caller ID
Caller ID signal is sent through the circuit via the following path:
TEL Line
→
C501, C502
→
R551, R552
→
Pin92,93 of IC502
32
KX-TSC11MXB / KX-TSC11MXW