Tel Line Section ( Fax Supported Models Only ) - Panasonic KX-MB2230JT Service Manual

6.3.4.

TEL Line Section ( Fax supported models only )

Composed of ITS circuit and NCU circuit.
6.3.4.1. Description of Block Diagram in Analog Section
Function
The analog section works as an interface between the telephone line.
DAA control ITS circuit and NCU circuit.
DAA control signals are output from SOC (IC300).
Circuit Operation
[NCU]: Network Control Unit the NCU comprises of the following; DC loop forming circuit to connect with the telephone line;
Switching circuit for other interconnected telephones; Bell detection circuit; Remote fax activation circuit.
Refer to NCU Section ( Fax supported models only ) (P.35) for the details.
KX-MB2230JT/ KX-MB2270JT/ KX-MB2515JT/ KX-MB2545JT/ KX-MB2575JT/ DP-MB310JT
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