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Table A-1 Phenomenon Caused by Deteriorating Factors and Countermeasures
Deteriorating
Factor
Echo
Control procedure errors may occur.
Time taken for
In international communications, it
establishing line
may take a long time to connect
connection
lines. With automatic dialing, it may
not be possible to connect.
Lightning
High voltage is conducted on tele-
phone lines when lightning strikes.
This voltage passes through the
NCU board and may damage the
inside of the facsimile.
Phenomenon
Countermeasure
Several countermeasures are avail-
able. (See this chapter, 7.3 Echo.)
Insert a pause in the registered tele-
phone number.
• Take high-quality ground.
• Unplug the power supply cord and
telephone line during thunder-
storms.
1
2
3
4
5
6
A
çi
A–9
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