Muratec F-110 Field Engineering Manual page 57

Circuit Description
4-3 LIU PBA
The LIU (Line Interface Unit) using the discrete method is comprised of the following.
(1) Tel_line Interface Circuit that connects the PSTN(exchange) and the system (Facsimile)
(2) Telephone circuit composed of dial/speech circuit.
4-4-1 Tel_Line interface Circuit
Tel_Line Interface is the path that connects the signals between PSTN(exchange) and the system (Facsimile) and it is com-
prised of Tel-Line Interface Circuit and Impedance Matching Trans Circuit.
(1) TEL_LINE Interface Circuit
(2) TRANS Circuit for IMPEDANCE MATCHING
4-4-2 Telephone Circuit (Ringer/Dial/Speech Circuit, etc)
The telephone circuit is comprised of ring detect circuit, dialer circuit, speech circuit, external hook detect circuit and recall cir-
cuit.
(1) Ring Detect Circuit
(2) Dialling Circuit (including MF Dialling Signal Transmitting Circuit)
(3) Speech Circuit
(4) External Hook Detect Circuit
(5) Recall Circuit
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