KX-TG2511RUM, KX-TG2511RUN, KX-TG2511RUS, KX-TG2511RUT, KX-TG2512RUN, KX-TG2512RUS, KX-TG2521RUT, KX-TGA250RUM, KX-TGA250RUN, KX-TGA250RUS, KX-TGA250RUT - Panasonic Provideo Service Manual Supplement (repair manual). Page 13

13

The voltage from the AC adaptor is supplied to the charge circuits.

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 either method of FSK or DTMF. The method is chosen
according to the exchange of telephone office. This unit is available to receive the data with both methods and displays the
received data on LCD.

• FSK (Frequency Shift Keying) format

• DTMF format

It is the method to send the telephone number of calling party with DTMF to the telephone. DTMF is sent before the first bell sig-
nal.
The data is sent in turn; first the start code, secondly the telephone number of calling party, lastly end code.
The DTMF is chosen from A (1633 Hz and 697 Hz), B (1633 Hz and 770 Hz), C (1633 Hz and 852 Hz) and D (1633 Hz and 941
Hz) as the start code and end code according to the exchange.

D362

R37

2

R371

CHARGE+

F301

DCP

CHARGE-

+6.5V

DCM

STD Ring / 20Hz
Tip-Ring

FSK

DATA in

1st Ring

Silent interval

2nd Ring

DATA

0.1Vrms

70Vrms

1300Hz or
1200Hz
=DATA "1"

2100Hz or
2200Hz
=DATA "0"

Startcode

Endcode

Calling party's 
telephone number

DTMF

1st Ring

0.1Vrms

70Vrms