Canon fax basic 2000 서비스 매뉴얼

GENERAL DESCRIPTION OF A FACSIMILE

2–22

2.4

NCU board (Network Control Unit board)

The NCU board is a kind of relay board for interfacing the telephone line

to facsimile equipment. This unit detects the calling identification signal

(for ringing the bell on the called party’s telephone) that arrives from the

telephone line to perform control of connection to the telephone or the

modem.

Fig. 2-20   NCU board Location

2.5

System Control Section

The role of this control section includes the control of all facsimile devices

(mainly the 

, program ROM and memory), data processing and saving

of data.

Generally, the system control section corresponds to the electrical circuit

boards called the SCNT board or IP board mounted on Canon facsimiles.

Telephone line

T1

T2

L1

L2

System

control

section

Facsimile

MODEM

NCU

board