Telephone Line Interface; Pulse Dialing - Panasonic KX-TCD400RUB Service Manual

20.3. Telephone Line Interface

<Function>
Bell signal detection:
ON/OFF hook circuit:
off-hook condition
off-hook condition
20.4. Transmitter/Receiver
Signal Pass:
SIGNAL ROUTE
20.4.1. Transmitter Block
DIAGRAM (BASE UNIT)
20.4.2. Receiver Block
DIAGRAM (BASE UNIT)

20.5. Pulse Dialing

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BELL
BELL
OFF HOOK
BLOCK
BLOCK