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d. Crosstalk test
As shown the figure below: it shows 3, 6 and 4, 5 with crosstalk. The line
pair with crosstalk will flash to indicate failure. In the line pair with crosstalk,
end-to-end connection is correct. However the connected lines are from
different line pairs. Line pair crosstalk will cause an over large crosstalk,
and therefore, network operation is interfered.
3
6
4
5
Connection diagram of crosstalk line pair
Crosstalk interface is shown as below:
Note:
In case of the non-twisted-pair cable like telephone cable,
due to over large crosstalk, it generally shown as crosstalk.
Wire Map: Remote
1 2 3 4 5 6 7 8
M:
R:
1 2 3 4 5 6 7 8
Crosstalk line pair flashes
-17-
Your wiring expert
3
6
4
5
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