Panasonic KX-TG3411BXH Service Manual page 17

4.5.6. Calling Line Identification (Caller ID)/Call Waiting Caller ID
Function:
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
STD Ring / 20 Hz
Tip-Ring
FSK DATA in
1300 Hz or
1200 Hz
=DATA "1"
• 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
signal. 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
941Hz) as the start code and end code according to the exchange.
1st Ring
DATA
2100 Hz or
2200 Hz
=DATA "0"
Calling party's
Startcode
telephone number
DTMF
KX-TG3411BX/KX-TG3412BX/KX-TG3419BX/KX-TGA341BX
Silent interval
0.1 Vrms
Endcode
1st Ring
0.1 Vrms
17
2nd Ring
70 Vrms
70 Vrms