Cable Test Setup and Results
178
FTB-860/880
Summary Results
MDIX (-)
: For 1Gbit/s, crossed pair with pair A swapped with pair B
and/or pair C swapped with pair D.
Noise:
Excessive noise on a pair most likely caused by a link
partner running in 10/100 Mbit/s forced mode. In this case, no
propagation delay or length is reported and there is no comparison
with any threshold.
Note:
For 1Gbit/s, both MDI and MDIX can be reported simultaneously since
crossed pairs detection is performed independently for pairs A-B and C-D.
When the link is down:
Short:
Short-circuit between Tip and Ring wires of a pair or Tip or
ring wire of a pair is connected with an alien wire grounded.
Open:
No cable plugged in, remote end open, or either one or two
wires of a pair are not connected.
Short-between-pairs:
Short between one or two wires of a pair
with one or two wires of another pair. Short between more than
two pairs, including one or two wires for each pair.
Noise:
Excessive noise on a pair most likely caused by a link
partner running in 10/100 Mbit/s forced mode. In this case, no
distance is reported and there is no comparison with any
threshold.
Unknown:
No fault has been identified but the link is down. To
maximize the cable test result, it is preferable to have the far end
equipment powered up.
Note:
Refer to
Distance To Fault (m/ft)
: Gives the distance to fault from the near end
for each pair, unless the problem is due to excessive noise. Noise may
be due to electrical noise causing communication error.
Summary of Contents for FTB-860
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Page 382: ...Specifications 370 FTB 860 880 Straight Through Cable 1000 Mbit s Crossover Cable 1000 Mbit s...