EXFO FTB-860, Руководство пользователя, Страница: 190 / 409

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
Ethernet Cables
on page 369 for cable pinout.

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.