5.14 Cable diagnostics
63
–
short — two or more conductors are short-circuited together;
–
fail — test failed.
•
Att., dB
— signal attenuation value.
•
Dist., m
— distance to the defect.
•
Polarity
— polarity of twisted pairs.
Possible states:
–
<
+
>
— positive polarity (normal state);
–
<
—
>
— negative polarity (two conductors in a twisted-pair are
connected with reverse polarity).
•
Crossover
— cross-connection of twisted-pairs (MDI/MDI-X); these
values allow to define the cable type.
In the table 5.5 speed (Mbit/s) for the port A and port B can be specified
in the
Interface setup
menu.
Table 5.5. Cable type analyzing
Speed, Mbit/s Pair
Value
in
menu
item
Crossover
for the port
A
Value
in
menu
item
Crossover
for the port
B
Cable type
1-2
3-6
4-5
7-8
MDI
MDI
—
—
MDI
MDI
—
—
crossover
1-2
3-6
4-5
7-8
MDI-X
MDI-X
—
—
MDI-X
MDI-X
—
—
crossover
10/100
1-2
3-6
4-5
7-8
MDI-X
MDI-X
—
—
MDI
MDI
—
—
straight-
through
1-2
3-6
4-5
7-8
MDI
MDI
—
—
MDI-X
MDI-X
—
—
straight-
through
ETS-1000. Operations manual
Содержание ETS-1000
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